Jeep

Have Jeep questions? Ask a Jeep repair expert for answers

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

Auto Question for. Will a bad airbag module cause the low…

Auto Question for Doug.Will a...
Auto Question for Doug.Will a bad airbag module cause the low voltage code?
Show More
Show Less
Ask Your Own Jeep Question
Answered in 5 minutes by:
1/12/2018
Doug
Doug, ASE Certified Technician
Category: Jeep
Satisfied Customers: 8,659
Experience: ASE Certified technician with experience in all levels of automotive repair
Verified

Hi Dom,

Yes, it is very possible if the vehicle was in a collision that deployed either bags or seat belts. The reason for this is the srs ecu is only really meant to work "one time"... it delivers its charge at high amperage to the bags/belts requested to be sure the signal reaches the safety device as fast as possible (before wiring can be damaged etc in the accident). As a result of this, internal damage to the srs ecu is highly likely. This is the reason some manufacturers (primarily Asian ones) use permanent "collision faults" that can not be removed, so the ecu can not be reused later.
If your vehicle voltage is normal (12-ish at rest, running 12.8-14.5, no lower than 10.5 when cranking), and you have good voltage at the power inputs to the srs ecu, and you still have a srs ecu low voltage fault, it is most certain that the ecu will be at fault.

Ask Your Own Jeep Question

For an actual air bag itself or seat belt itself (squibs they sometimes call them) to cause a low voltage fault however is not likely at all. They are simply a low resistance loop from the ecu... they are either there or short circuit or open circuit, none of which should be able to influence a low voltage fault. If you are suspicious though, you can always unplug the bag/belt/etc in question and see if the low voltage fault goes away (replaced by a squib circuit fault).

Ask Your Own Jeep Question
Customer reply replied 7 months ago
Doug, I'll let you know what happens after I get the airbag module back. I am going to send it in to a company to be reconditioned and then dealer-programmed for the car. If you ever need help for a Mac, PC or iPhone, I am your man. You've been extremely helpful to me and that's one way I could be helpful to you hopefully.
Sounds good Dom, keep me in the know.
If I ever detach from this site entirely, we'll definitely find a way to help each other out :)
Ask Your Own Jeep Question
Customer reply replied 6 months ago
Hey Doug. I got the airbag module back. Plugged it in and tried to reset the code, but the VCDS Lite software will not read the airbag module. It won't even read the engine module. When I test the communication from the software to the cable it the PC recognizes the cable. When I test the connection between the software and OBD II port it says the software is compatible with the OBD II system and should, but it still can't read the module. What do you think?

I would try a full scan tool before making any judgments on the vehicle. Those vag cables are a bit sketchy to begin with, and (going back 10+ years mind you) if they weren't genuine ones they often would sometimes not work more often than they did work.

Ask Your Own Jeep Question
Customer reply replied 6 months ago
This morning I connected my other scan too and it gave me a link error. I disconnected the battery and then disconnected the airbag module and tried again with other scan tool. It connected just fine. I tried the vag com software and it connected just fine. Could it be a problem with the airbag module?

That's weird... I have no explanation for that. It would certainly bother me that unplugging it makes everything else work. I remember way back when we used to have problems with the ABS modules failing on the VWs and when that happened they would crash the bus and you couldn't connect with anything. Perhaps this is similar, but I would think they would have tested the module before sending it. Might be worth a phone call to them.

Ask Your Own Jeep Question
Customer reply replied 6 months ago
Just got the airbag module back from the vendor. I plugged it in and bolted it down. Turned the key and no airbag light! When I got it back the first time I just plugged it in and didn't bolt it down. Apparently, they case needs to be touching the body because that is where the module gets its ground. By not bolting it down, I shorted it out! Another learning experience. :)
Oh yeah, you definitely need it grounded :)
Side note, whenever fooling with srs ecus always unplug them before unbolting them... Not just for the ground issue, but also some ecus will interpret rotating the ecu as a rollover event and deploy curtain bags even if the key is off!Glad it's all squared away and you can start enjoying it!
Ask Your Own Jeep Question
Customer reply replied 6 months ago
Hey Doug. I had to replace the engine oil adapter on that Bug because the housing was cracked from the accident. I put on the new adapter, put on the oil cooler, and installed the oil filter. There is a leak between the oil cooler and adapter. I have had that thing on and off a bunch of times. I have tried new gaskets, gasket sealant between the gasket, all tightening the nut more. All to no avail. It leaks in the same spot. Is it possible the accident caused the mating surface of the oil cooler to the engine adapter to warp? Here is a picture of the engine oil cooler adapter and oil cooler for reference.
It isn't really likely to be a result of the accident. Those coolers are super common to leak, both the coolers themselves and the gasket between the engine and the cooler.
I'd brake clean it really well and see if you can see any cracks, in case the threaded shaft got bent etc. I think it would be pretty obvious if it did though.
Otherwise I'd make sure you have new vw gaskets and reassemble, then if you can get your hands on a can of it, spray it with leak detection powder to make it easier to see where the leak begins.... Then just idle and stare until you see dampness start.
Ask Your Own Jeep Question
Customer reply replied 6 months ago
Thanks Doug. There is a new threaded shaft that came with the engine cooler adapter. There are no leaks between engine or the adapter. The leak is happening between the cooler and the adapter. The reason I know that is because I thought it would be a good idea to use white lithium grease on the rubber gasket between the cooler and the adapter (novice idea). I do have a new VW gasket between the cooler and the adapter. I saw the white lithium grease coming out with the oil from the leak. What do you think I should do next?
the leak is above or below the cooler?
Ask Your Own Jeep Question
Customer reply replied 6 months ago
Leak is above the cooler.
Yeah just double check for cracks, if nothing then reassemble with a fresh gasket, no grease, and be sure you don't over tighten it. I want to say it's like 20-25 ft lbs.
If there aren't any cracks in the flange, it's either the gasket or the cooler. Sometimes new stuff is bad.
Ask Your Own Jeep Question
Customer reply replied 6 months ago
Could over tightening cause it to leak? I can try another gasket on Monday. The dealer had 1 left after I bought this one. If that doesn't work should I try the cooler? Thanks Doug!
it could. I'm really bad about over tightening things and can tell you from experience on the old 2.0 VWs you can definitely over tighten them :)
Yes if still the same, try another cooler. I don't see any reason you have a problem other than one of those two if you don't see any damage (cracks) to the adapter.
Ask Your Own Jeep Question
Customer reply replied 6 months ago
Sounds good. I'll let you know what happens. I couldn't see any cracks in the adapter. I ran fingernail over the flange to feel for a crack and the entire flange was smooth. Do you think those coolers are necessary? Do people ever bypass them?

Let me know what happens. I haven't heard of anyone bypassing them, but i would imagine it's been done. I don't really think they are necessary on non-turbo models.

Ask Your Own Jeep Question
Customer reply replied 6 months ago
I bypassed the oil cooler. Guess what? Still leaked. However, I removed a bracket on the adapter and found the source of the leak! One of the plugs in the adapter is loose. I am still going to run the car without the cooler and I am fairly certain there was a problem with the cooler surface and the adapter surface because I saw the white lithium grease ooze out with the oil leak. So that means there were two leaks. I thought I was losing my mind with this one!
Great job Dom!
Ask Your Own Jeep Question
Customer reply replied 5 months ago
Hey Doug. Hope you're doing well! My '16 Cherokee won't start after 1 to 2 days of no driving. The battery is just dead. After I charge it, starts right up. There is no visible damage from the accident to the battery. Where do you think I should start looking? Thanks!

Start checking for things like doors that are not fully flush, if the visors have lighted vanity mirrors, make sure they are not staying lit.

If you have anything aftermarket in there (radio, GPS, anything), unhook it first and see if there is any change.
If you can't find anything obvious that is staying on with the key off, get the battery tested just to make sure it isn't failed (or defective if new).

If the battery tests good, then you'll want to do a parasitic draw test... unhooking the negative battery terminal and connecting an ammeter between the cable and the negative post. An acceptable draw is around 10-40mA on a car this new (ideal is more like 10-20, but newer cars are getting thirstier with the key off). If you see enough to kill the car in two days, it would be 100mA or higher most likely. From there you will want to try unplugging things/fuses one a time until you see the draw drop to a reasonable level (NOT 0 though, that just means you pulled the retained power/memory fuse!).

Be aware you can NOT turn the key on while the ammeter is hooked up; likewise you can not open the doors (if you need the doors open, you'll need to unplug them so the dome light doesn't register); any high draw like that will blow your meter.

Honestly odds are it is just the battery though. Check the basics for stuff left on like dome lights or aftermarket gear, if nothing get the battery checked. If it is new and not high end it may just be a bad battery; if original the impact would certainly be enough to damage the battery as the shock will often affect the plates inside them even if not directly hit.

Ask Your Own Jeep Question
Customer reply replied 5 months ago
I bought an new battery and I'm going to put it in today. I'll let you know what happens. I bought a 2015 Jeep Renegade that was in an accident. When I put it in reverse it kept bumping like it was going to go then stopped. I didn't have my foot on the gas. The service transmission light is on, but the transmission cover is intact and the wires going to the range sensor are good. Any idea what it could be? Thanks!
Cool.
That's pretty weird behavior, nothing really comes to mind. Make sure there's isn't a broken axle... I haven't seen it in that model, but older Chryslers we'd sometimes see the joint fail and look okay, spinning inside the boot :)
Otherwise, get the codes checked and see if there's a good hint there.
Ask Your Own Jeep Question
Customer reply replied 5 months ago
Guess what I found at the bottom of the battery on the back side of the 16 Cherokee? I nice little hole for fluid to leak out. :) It's where the battery was pushed up against the back of the battery tray from the accident. I'll let you know what I find on the Renegade. When I put it in reverse it's like it keep going into and out of gear.
Sweet! Didn't suspect that, but was pretty sure it would be the battery one way or another.Yeah with the renegade I don't really have any thoughts on that, haven't really dealt with them that much. Other than like I said before, check for axle issue, check trouble codes since you know something is reported. I'm not sure if you can check the fluid level on that one or not... Probably need that special tool dipstick again. I just don't have enough experience on that one too know of anything specific that might be common.
Ask Your Own Jeep Question
Customer reply replied 5 months ago
Yeah, I never noticed that hole while handling the battery. Here is the list of codes I pulled off that Jeep. Could one of these cause the behavior I described? Jumping into and out of gear?P0030 - Heater Control Circuit (Bank 1 Sensor 1)
P0007 - Fuel Shutoff Valve "A" Control Circuit High
P0364 - Clutch Position Sensor Circuit Malfunction
P3219 - No Definition
U100P - Lost Communication with ECM
0CFLP - No Definition
000LP - No Definition
007LU - No Definition
2191p - No Definition
U1000 - Lost Communication with ECM

Nothing there really rings a bell... and the defined ones I don't really see any expected correlation. Again I'm not familiar with that model though.

Doug
Doug, ASE Certified Technician
Category: Jeep
Satisfied Customers: 8,659
Experience: ASE Certified technician with experience in all levels of automotive repair
Verified
Doug and 87 other Jeep Specialists are ready to help you
Ask your own question now
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a jeep mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Doug Your Own Question
Doug
Doug
Doug, ASE Certified Technician
Category: Jeep
Satisfied Customers: 8,659
8,659 Satisfied Customers
Experience: ASE Certified technician with experience in all levels of automotive repair

Doug is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Thank you so much for your answer. My initial estimate was $325; I got it done for $100 - part and labor.

Lynn B.Ormond Beach, FL

I was skeptical at first but thought I'd give it a try. I was pleasantly surprised. Your site actually is a quality service that I would recommend to others in a heartbeat.

StanSayre, PA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

< Previous | Next >

Meet the Experts:

Chris

Chris

Shop Foreman

3,578 satisfied customers

Jeep Certified Master Tech

Mark

Mark

22 Year Factory trained technician

2,649 satisfied customers

Jeep factory training........25 years in the industry.

Dave

Dave

Jeep Master Tech

1,149 satisfied customers

Chrysler Triple Master, ASE master Tech AA degree in Auto.

moparfl

moparfl

ASE Certified Technician

1,130 satisfied customers

ASE Master Tech Chrysler Dodge Jeep Master Tech

Tim Mohr

Tim Mohr

ASE MASTER TECH

1,052 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Ron Z.

Ron Z.

- Jeep Tech -

641 satisfied customers

18+yrs experience. State Inspector & Jeep Diagnostics/Repair

jeepmopar76

jeepmopar76

Jeep/Chrysler Triple Master Tech

579 satisfied customers

32yr ASE Master Tech, 9yr Chrysler Master Tech, 19 yr Jeep Dealership service including AMC/Eagle

< Previous | Next >

Related Jeep Questions
1999 jeep grand cherokee gauges and windows not working at
1999 jeep grand cherokee gauges and windows not working at the same time apparently no communication with the cluster. What can I start checking?… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
I have a 2000 jeep Cherokee a few months ago I got acode
I have a 2000 jeep Cherokee a few months ago I got acode 1698 and 1694 no bus replaced the tcm was fine now its doing it again and the gauges don't work again I got another one and it didn't work this… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
I had a auto mechanic quickly scan the air bag system and said
I had a auto mechanic quickly scan the air bag system and said in could not get a reading. I had the drivers side door look, electric window panel assembly recently replaced. Could this have something… read more
jim
jim
Vocational, Technical or Trade Scho
702 satisfied customers
Wrangler sport: I have a 98 Jeep Wrangler and Im having trouble
I have a 98 Jeep Wrangler and I'm having trouble with the dash cluster gages going to 0. I've had the can bus connector replaced as per the service bulletin that was issued in 2000. I've swapped the c… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Overland: Multiple problems with the computer system in response
Multiple problems with the computer system in response to warning lights and messages. (air bag light constant can't reset. Air pressure warning-sensor missing or defective, but all wheels are reporti… read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
1998 jeep Cherokee,airbag light comes on,fuel guage and speedo
1998 jeep Cherokee,airbag light comes on,fuel guage and speedo quit,blow horn will work again,,quit 2day and blew horn still not working… read more
Chris
Chris
Shop Foreman
3,578 satisfied customers
Jeep Cherokee Sport: Hi.My 2001 Cherokee Sport starts and
Hi. My 2001 Cherokee Sport starts and runs good but I have been losing my tach and speedometer, then the airbag and finally the 'no bus' message. I gun the motor and everything returns to normal for a… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
cherokke sport: 2000 jeep cherokee sport, 4.0 auto customer
2000 jeep cherokee sport, 4.0 auto customer complaining of intermitant bucking / stalling at same time oil pressure goes up and down and all instrumentation goes crazy. i hooked up scanner to it and i… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Grand Cherokee: all the gauges stop working from time to time,
all the gauges stop working from time to time, one min they are working and the next everyone of the gauges will stop. including the speedometer, fuel, tac everything. On a different note, sometime th… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
grand cherokee: How do i clear the squib2 fault in jeep grand
How do i clear the squib2 fault in jeep grand cherokee the clock spring was replaced today but air bag light is still on… read more
jazzmaster
jazzmaster
LEAD AUTO TECH
Vocational, Technical or Trade Scho
1,124 satisfied customers
1999 Jeep Grand Cherokee Laredo: airbag lights keeps coming
RE: 1999 Jeep Grand Cherokee Laredo: Airbag lights keeps coming on and off sporadically. What could be the cause of this issue?… read more
Brad
Brad
Technician at Dodge Dealership
Vocational, Technical or Trade Scho
12 satisfied customers
, I have a 2005 jeep cherokee laredo and my airbag light just came on.
hi, I have a 2005 jeep cherokee laredo and my airbag light just came on. It keeps turning on and off… read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
2000 Jeep Cherokee: airbag light..intermittently..one of the sensors
Hello, My 2000 Jeep Cherokee's airbag light has started to come on intermittently, sometimes for 30 seconds, and sometimes for 5-10 minutes. It seems to do it only on really cold mornings. I was told … read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
2001 Jeep grand cherokee limited: V8..red air bag warning light
The heater blower fan speed constantly fluctuates between high and low ranges with turning the dial on my 2001 Jeep grand cherokee limited V8. How do I fix and what is wrong? Also the red air bag warn… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
99 wrangler sport: airbag light comes..speedometer..tach stop..gauges
I have a 99 wrangler sport, 4.0 liter straight 6. The airbag light comes on and the speedometer and tach stop working. Occasionally all the gauges stop. The 2 or 10 miles later, or the next day everyt… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
2000 Jeep Wrangler: about 30mph it wont shift..rev meter..faster
I have a 2000 Jeep Wrangler. It had been sitting outdoors for two years. When vehicle gets up to about 30mph it won't shift up and rev meter gets up near 4 and will not go any faster. Transmission flu… read more
brownjeff
brownjeff
Associate Degree
13,873 satisfied customers
1997 Jeep Wrangler: 000 miles..the instrument cluster..brake light
I have a 1997 Jeep Wrangler 2.5 5-speed with 60,000 miles. I owned it a week and the instrument cluster quit working, with the exception of the blinkers and brake light (in the cluster). After cleanin… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
2000 Jeep Wrangler: 4.0L..airbag light..gauges..checked fuses
I have a 2000 Jeep Wrangler 4.0L The Airbag light is coming on and causing the gauges to go off while you are driving and then they come back on after a little while , what is causing this ? checked f… read more
Derrick
Derrick
Associate Degree
920 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x