Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

I have a 2013 Tahoe with 5.3 engine. The service engine

light comes on when the...
I have a 2013 Tahoe with 5.3 engine. The service engine light comes on when the temperature drops below 45 degrees. It will go out when the temperature is above 45 or 50 degrees. The code it sets is P219a. Greens in Davenport IA have not been able to determine what is wrong. They tell me the O2 sensors test good.
Show More
Show Less
Ask Your Own Chevy Question
Answered in 25 minutes by:
12/9/2017
Eric
Eric, Automotive Repair Shop Manager
Category: Chevy
Satisfied Customers: 33,981
Experience: 20+ yrs. experience as repair shop manager and technician.
Verified

HI,

Ok, this a code for Fuel Trim Cylinder Balance Bank 1

First, I need to know if yours has aftermarket exhaust system, aftermarket air filter kit such as a K&N cold air kit, aftermarket intake manifold

Second, does the scan tool you bought have live data that shows voltages, vacuum Hg, etc for all the sensors

Ask Your Own Chevy Question
Customer reply replied 4 months ago
All original no aftermarket equipment.I'm not sure about the scan tools capabilities. The scan tool is Autel AL519 AutoLink Enhanced OBD ll Scan Tool with Mode 6 Fault Code Reader EOBD if that helps you any. I am 73 years old and understand basic automotive mechanics. But I getting to be too old to be crawling around under the hood anymore. I'm hoping to come up with something that I can take to the dealership and say "here do this" and see if it helps.

HI,

Ok, reading their write up, it does have live data. I havent used this one, but there should be directions to get to that screen. You will read live data with the engine idling and scan tool hooked up.

I need you to check the data showing for the MAP sensor. It should show in either voltage, Hg or Psi reading. I need that reading to know which direction to go on diagnosing

Ask Your Own Chevy Question
Customer reply replied 4 months ago
The fact that the problem is temperature sensitive causes me to wonder if it could be a component connection somewhere. Or a temperature sensitive component.OK I'm in the house so I'll go hook up the reader and see what I can see. I don't know if my wiFi is strong enough to reach the garage or not. Stand by.

HI,

The MAP sensor is affected by temperature, which is why that is the reading I am looking for to start with.

Ask Your Own Chevy Question
Customer reply replied 4 months ago
OK the model reader i have is not capable of checking any MAP sensor data.
Customer reply replied 4 months ago
Are you still with me?

HI,

Still here. Was walking someone thru removing their engine.

Ok, without knowing the readings, I cannot say definitely, but the most common temperature related cause for this code is the MAP sensor, followed by an intake manifold gasket leak on bank 1. As the temperature warms up, the leak is sealed by the metal expansion of the intake.

If the engine idle is erratic in cold temperature on first start up, I would more suspect the intake manifold gasket leaking. If not, then the MAP sensor

If for any reason, you can't rate my answer OKAY, GOOD, or EXCELLENT/3 STARS OR HIGHER today. Please reply and let me know why, so I can help more/better. All follow up responses are FREE, after completing the required rating

Please remember to rate service using the separate rating page. Thank you

Please note that if you have a subscription service, you still are required to rate service, however you are not charged again. This is just so that your expert is credited for their time and services. Thank you.

Ask Your Own Chevy Question
Customer reply replied 4 months ago
The engine runs beautifully from cold start to fully warm. Can the MAP sensor be tested directly? As not with a OBDII reader but as if it were off the engine?

HI,

let me check to see if there are any tests not involving a scan tool

Ask Your Own Chevy Question

Every test requires a scan tool with command and control functions in addition to needing live data

Eric
Eric, Automotive Repair Shop Manager
Category: Chevy
Satisfied Customers: 33,981
Experience: 20+ yrs. experience as repair shop manager and technician.
Verified
Eric and 87 other Chevy Specialists are ready to help you
Ask your own question now
Customer reply replied 4 months ago
OK I think I'll check the dealership to see about testing it. Or given the hourly rates it might just be money better spent to replace the dang thing. I've searched for people who may have had similar problems of and on for the past several years. Because there seems to be no drivability or performance problems I tend to ignore it for awhile and then search for awhile. The recent cooler weather lit it up full time so I'm back in the hunt. Thanks for the new idea.
Was this answer helpful?
Ask Eric Your Own Question
Eric
Eric
Eric, Automotive Repair Shop Manager
Category: Chevy
Satisfied Customers: 33,981
33,981 Satisfied Customers
Experience: 20+ yrs. experience as repair shop manager and technician.

Eric 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:

I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money.

Todd LRochester NY

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

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,289 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,357 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,866 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

2,918 satisfied customers

Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

Ron Z.

Ron Z.

- Chevy Tech -

2,734 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
2009 duramax 3000, mi sits a lot, had exhaust filter that
2009 duramax 3000, mi sits a lot, had exhaust filter that would not clean ,replaced with straight pipe and tuned by mechanic.Now engine light code says turbo. I wonder if it was tuned right by mechani… read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
Fault msg in exhaust Urea treatment: ;P2565-OBD-11. ~78,000;
Fault msg in exhaust Urea treatment: ;P2565-OBD-11 … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
353 satisfied customers
I have a indicator that is telling me to service my exhaust
I have a indicator that is telling me to service my exhaust fluid system and it's counting down to limit my speed, what can I do to stop this? … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
I am just starting to hear a slight exhaust leak on my 97
I am just starting to hear a slight exhaust leak on my 97 k2500 suburban and i am thinking about changing the entire system i want to run dual exhaust with flow masters and headers but still use my o2… read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
After changing the solenoid for the exhaust and manifold, My
after changing the solenoid for the exhaust and manifold, My '08 Chevy Malibu still has rough acceleration or rough idling … read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
353 satisfied customers
Drove till my 2012 VOLT electric charge was exhausted.
Drove till my 2012 VOLT electric charge was exhausted. Parked in garage by my home charging station but failed to plug in the charger. Three (3) days later my 12 volt battery appears to be totally dea… read more
Todd Audette
Todd Audette
Automotive Technician
Vocational, Technical or Trade School
353 satisfied customers
I have a 2010 2500hd with LMM. Exhaust lately smelling more
Hi. I have a 2010 2500hd with LMM. Exhaust lately smelling more dieselly....almost like no dpf.... … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
I have a 2015 Chevrolet 2500hd. Service Exhaust Fluid system
Hello I have a 2015 Chevrolet 2500hd. Service Exhaust Fluid system is flashing, 36 miles until speed rated 65mph. I recently had a code for def heater. I replaced heater, temp switch, & def pump. I no… read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,289 satisfied customers
Warning light says clean exhaust filter code thrown P0101 on
Warning light says clean exhaust filter code thrown P0101 on Duramax 2008 2500HD … read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
I'm getting a service exhaust fluid message. 130,000,
yes, ive tried the module on top of the exhaust fluid tank … read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
My 2013 Chevy equinox has a broken exhaust manifold. I
My 2013 Chevy equinox has a broken exhaust manifold. I looked on YouTube and the repair looked pretty basic so I decided to do it myself, only problem is the video I looked at is for a 2012 and mine i… read more
Gary
Gary
Chevy Technician
Vocational, Technical or Trade Scho
9,357 satisfied customers
Same issue, as on this screen. 2011 duramax, service exhaust
same issue, as on this screen. 2011 duramax, service exhaust system - see owners manual. Have snap on code reader, no error codes present. 162k miles.… read more
Eric
Eric
Automotive Repair Shop Manager
33,981 satisfied customers
Fuel coming out exhaust. Turned into a gas hog. Chevy half
they changed plugs plug wires injectors and the truck runs rough and mileage is down and holding your hand at the exhaust you can feel droplet of unburent fuel … read more
Expert
Expert
26 satisfied customers
My engine light went on yesterday The code is P0013. Exhaust
My engine light went on yesterday The code is P0013 … read more
fordguy4u
fordguy4u
Automotive Tech
Vocational, Technical or Trade Scho
70 satisfied customers
Engine light on" clean exhaust filter continue to dric. Ve
engine light on " clean exhaust filter continue to dric … read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
I get a bad odor like rich exhaust from the car. No exhaust
I get a bad odor like rich exhaust from the car. No exhaust leaks, no check engine light all engine data seems normal … read more
rpmdiag
rpmdiag
High school
7,492 satisfied customers
Exhaust smell with a/c on and windows closed. No it has been
we have mechanics at the factory they checked the exhaust mnaifold and a/c intake but could not pinpoint it we can take it to the dealer if needed … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
Cleaning exhaust fluid message then goes into engine power
Cleaning exhaust fluid message then goes into engine power reduced. Anything I can do we are in the boonies … read more
Eric
Eric
Automotive Repair Shop Manager
33,981 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