Dodge

Dodge Repair Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Dodge

2001 Dodge Ram 1500: diagnostic codes..this is an emission problem

Customer Question
I have a 2001 Dodge...
I have a 2001 Dodge Ram 1500. The diagnostic codes that showed up are P455 & P442. I know this is an emission problem.    What do I need to do to repair this?
Submitted: 10 years ago.Category: Dodge
Show More
Show Less
Ask Your Own Dodge Question
Answered in 1 hour by:
9/29/2007
Dodge Mechanic: Dodgerench, ASE Certified Technician replied 10 years ago
Dodgerench
Dodgerench, ASE Certified Technician
Category: Dodge
Satisfied Customers: 3,412
Experience: 30+ years Dodge/Chrysler exp., ASE Master with L1 certification. Driveability/ combustion specialist
Verified
Customer welcome to JustAnswer!.

These two codes indicate an evaporative system leak has been detected by the Leak Monitor. The code P0442 indicates a medium leak and P0455 shows that it escalated to a large leak.

First, some background on the system. Your fuel system basically consists of two parts: The liquid and the vapor portions.

Liquid, you know about. Fuel doesn't stay liquid, though, in your fuel tank. Gasoline would evaporate away if given the opportunity. The job of the evaporative system is to manage these vapors. They're held in the tank until internal pressures push them into a storage device called the vapor canister. From there, they're piped to the engine compartment and become part of the purge system. The purge solenoid opens under control of the PCM to allow metered amounts of vapor into the engine to be burned as you drive.

Your evaporative system includes all vapor lines and controls REARWARD of the purge solenoid. The codes you set indicate the problem lies somewhere between the gas cap and the purge solenoid, so this is where you will need to direct your attention.

First, check your gas cap. Very lightly, use the spring tension on the cap ratchet mechanism to turn the cap a little to the left (loosen). If the cap is loose, it will fall off easily. Tighten it at that point and you're done.

If it wasn't loose, it could still be defective. Caps develop evaporative leaks all the time. Unfortunately, there really isn't a good way to test one at your end. Replacement is easier.

The next check would be underhood. Your purge solenoid and lines are located on the right side fenderwell area underhood. It's very near the leak detection pump (LDP), which is what originally determined your leak problem.

Check for cracked or detatched hoses at the purge solenoid and LDP, following the hose harness as far as you can see. It will lead you to the next stop, if needed.

The vapor canister is located on the right side outer frame rail on your 2001 Ram. It's a two-piece unit, with a round and a square-ish canister mounted on a metal carrier. The hoses come into the canisters from the top, making inspection difficult without removing the carrier.

The carrier is held in place by four bolts (13mm hex head). Two at one end, one at another and the fourth in the upper center. You will need a 6" socket extension to get that one.

Once lowered, check all rubber in the area. The large hose goes to the LDP. The small (1/4" dia) hose heads toward the tank. And there is a pass-through (U-shaped) hose that connects the two individual canisters. This is the usual area where the leak is found. The canisters are sometimes damaged by contact with road debris, so look for signs of plastic trauma.

The pass-through hose is available separately. The small 1/4" hose can be cut from bulk. But the large hose connected to the LDP is serviced with a new hose harness only. You will need to see your friendly neighborhood Dodge dealer for that part.

The last possibilies for setting these codes are leaks above the fuel tank (sometimes given away by liquid fuel staining down the sides) or a failed LDP (rare).

Once you're confident you've found and repaired your leak, you can do two things to remedy the MIL light being on.

Nothing. The system will test itself each morning within minutes of start. Once two Good Trips are logged, the PCM will understand that the problem is no longer present and turn the light out.

Do a battery disconnect. This clears all information, including adaptives and such. It works, but the engine may run just a little different while the PCM relearns.

Either way, you should know within a few days whether the repair was good or not.

Good luck!

Ed

Dodgerench
Dodgerench, ASE Certified Technician
Category: Dodge
Satisfied Customers: 3,412
Experience: 30+ years Dodge/Chrysler exp., ASE Master with L1 certification. Driveability/ combustion specialist
Verified
Dodgerench and 87 other Dodge Specialists are ready to help you
Ask your own question now
Ask Dodgerench Your Own Question
Dodgerench
Dodgerench
Dodgerench, ASE Certified Technician
Category: Dodge
Satisfied Customers: 3,412
3,412 Satisfied Customers
Experience: 30+ years Dodge/Chrysler exp., ASE Master with L1 certification. Driveability/ combustion specialist

Dodgerench 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 AM VERY GLAD THAT I TOOK A CHANCE ON YOUR PROBLEM SOLVING SKILLS. I WAS SUCCESSFUL IN REPLACING THE FUEL PUMP. MY TRUCK RUNS LIKE A CLOCK. IT RUNS LIKE THE DAY I BOUGHT IT. NO LUNGING FORWARD, THE TURBO REACTS THE SECOND I STOMP ON THE GAS, AND IT HAS A LOT MORE POWER AND EVEN SOUNDS BETTER TO ME. IT SAVED ABOUT $500.00 BY DOING THE WORK MYSELF. I GIVE YOU ALL THE CREDIT FOR YOUR DIAGNOSING THE PROBLEM, JUST FROM THE SYMPTONS I GAVE YOU OVER THE e MAIL. I WILL USE YOUR WEB SITE AGAIN AND REFER MY FRIENDS. THANKS SO MUCH FOR THE HELP.

TOM WHITTAKERUSA

Just a quick line to tell you how pleased I am to have my brakes working properly after all this time. Your answer was what I needed. I would certainly recommend you highly. God bless!

Rev. Jerry BaysingerHolts Summit, Mo

I recently asked a question about my 2005 dodge ram, and I just wanted to let my Expert know that he hit the nail squarely on the head with his answer. I wanted to thank him again.

GregPittsburgh, PA

Just a quick line to tell you how pleased I am to have my brakes working properly after all this time. Your answer was what I needed. I would certainly recommend you highly. God bless!

JerryHolts Summit, MO

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

< Previous | Next >

Meet the Experts:

Jerry

Jerry

Master Mechanic

1,754 satisfied customers

ASE Master tech, 30 years exp. troubleshooter, driveability tech

Chris

Chris

Shop Foreman

6,753 satisfied customers

Dodge/Cummins and Chrysler Certified Master Tech

Mopar Certified

Mopar Certified

Dodge Technician

5,939 satisfied customers

24 Year Chrysler/Dodge Certified Specialist

moparfl

moparfl

ASE Certified Technician

3,292 satisfied customers

ASE Master Tech Gold level Chrysler Status 30 years dealership exp

Dodgerench

Dodgerench

ASE Certified Technician

3,412 satisfied customers

30+ years Dodge/Chrysler exp., ASE Master with L1 certification. Driveability/ combustion specialist

Tim Mohr

Tim Mohr

ASE MASTER TECH

2,322 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Don - Mo Lurch

Don - Mo Lurch

Aftermarket & Factory Electronics

1,568 satisfied customers

Cert. Dodge & Chrysler Warnty, Heavy Line Mech, Mobile Electronics. Sales, Installation & Repair for 30 years

< Previous | Next >

Related Dodge Questions
the blower motor quit on my 04 dodge ram 1500. checked the
the blower motor quit on my '04 dodge ram 1500. checked the fuse panel, ok. checked the resistor, no power. checked the blower motor lead, ok. checked the motor, ok. is there a second fuse panel or co… read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
dodge ram 1500: 09 dodge .ram 1500 no fuse msg when the key
09 dodge .ram 1500 no fuse msg when the key is turned to engage the starter.… read more
Brad
Brad
Technician at Dodge Dealership
Vocational, Technical or Trade Scho
12 satisfied customers
dodge ram 1500: stalls..when i accellerate hard it spits and sputters
03 dodge ram 1500 stalls when I start it up and when I accellerate hard it spits and sputters… read more
Dodgerench
Dodgerench
ASE Certified Technician
3,412 satisfied customers
I have a 2005 dodge ram 1500, and i need to know what
i have a 2005 dodge ram 1500, and i need to know what transmission is in it. here is my vin. 1D7HU18N65S13333 … read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
My 2007 Dodge ram 1500 Quad cab parking light not working on
My 2007 Dodge ram 1500 Quad cab parking light not working on the passenger side … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,403 satisfied customers
Just tried to help someone jump their car with my RAM 1500
just tried to help someone jump their car with my RAM 1500 ecodiesel and the cables got hooked up backwards. There was a little smoke and I quickly disconnected, but radio, and heated seats/steering w… read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
I just installed a new battery in my 2011 Dodge Ram 1500
I just installed a new battery in my 2011 Dodge Ram 1500 Laramie Longhorn. Put the key in the ignition and everything went dead. It acts like a dead battery but the battery tests out at 12.6 volts.… read more
Mopar Certified
Mopar Certified
Dodge Technician
Vocational, Technical or Trade Scho
5,939 satisfied customers
DODGE RAM 1500 INTERMITTENT TALL. This is a difficult one
DODGE RAM 1500 INTERMITTENT TALL JA: Okay, I'll connect you to the mechanic to discuss this further with you. Before I do, is there anything else you want him to know? Customer: This is a difficult on… read more
Chris
Chris
Shop Foreman
6,753 satisfied customers
Have a 2014 Ram 1500, engine light came on and i am getting
Second opinion] Have a 2014 Ram 1500, engine light came on and i am getting U11E9 and U0140 codes … read more
Chris
Chris
Shop Foreman
6,753 satisfied customers
I have a Dodge Ram 1500 pickup truck overheated put water in
I have a Dodge Ram 1500 pickup truck overheated put water in now it will not start … read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
I was at a stop light with my 2013 ram 1500, and all of
I was at a stop light with my 2013 ram 1500, and all of sudden my wipers came, and my dash instrumentation panel went black. I was able to keep driving, but the wipers would not cut off, made it home,… read more
Robert R
Robert R
Auto Technician
Vocational, Technical or Trade Scho
879 satisfied customers
Ram 1500 diesel truck won't start. i'm getting a anti theft
ram 1500 diesel truck won't start. i'm getting a anti theft code / restart the system last 8 # of vin fs549255 … read more
Chris
Chris
Shop Foreman
6,753 satisfied customers
2007 Dodge Ram 1500 Truck no electrical- ignition or
2007 Dodge Ram 1500 Truck no electrical- ignition or headlights, 16 volts across battery, replaced ignition switch & starter nothing … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,403 satisfied customers
There is no power to the coil. Consistent. 1999 ram 1500
Yes. I've tried another coil, ground and putting power to the wire that connects to the coil and all the fuses … read more
roy
roy
Associate Degree
3 satisfied customers
Reset anti theft on 14 ram 1500, Undone battery cable,
Reset anti theft on 14 ram 1500 JA: Are you fixing your Ram 1500 yourself? What have you tried so far? Customer: Undone battery cable JA: Have you tested the battery with a voltmeter? And can you see … read more
Don - Mo Lurch
Don - Mo Lurch
Aftermarket & Factory Electronics
Vocational, Technical or Trade Scho
1,568 satisfied customers
98 ram 1500 2wd auto won't crank battery and starter ,seem,
98 ram 1500 2wd auto won't crank battery and starter ,seem … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Dodge Ram 1500 idles low and says the battery is dead even
Dodge Ram 1500 idles low and says the battery is dead even though it's not. What could be wrong?… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
I have a 13 ram 1500 and disconnected the battery for
I have a 13 ram 1500 and disconnected the battery for maintenance and connected it again and I got an error that says wrong keyfob. I tried both of my fobs and nothing. I cant start it or anything … read more
Robert R
Robert R
Auto Technician
Vocational, Technical or Trade Scho
879 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