Question about 2007 GMC Sierra 2500HD

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Check engine light fuel evap system

6.0 v8 engine

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What are the codes and what is your question ?

Posted on Jan 13, 2013


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Posted on Jan 02, 2017


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I have a 2006 GMC 1/2 ton pickup with 5.3 V8. Engine light came on and upon checking, it has a P0442 and P0442 P code. Any suggestions on this? Also how do I erase the engine light.

You erase the engine light by fixing the problem . With every DTC - diagnostic trouble code there are diagnostic flow chart's , steps to find the problem .

DTC P0442 : Evaporative Emission (EVAP) System Small Leak Detected

How to Diagnose P0442 Small Evap Leak 04 Chevy Avalanche

Mar 22, 2017 | GMC Cars & Trucks

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How to repair engine code po442 2009 mazda 5?

Check the purge solenoid under the hood common problem in mazda 5 6 cx7.

Jul 11, 2014 | Mazda Cars & Trucks

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Code po456 on a 2006 mustang 6 cylinder. any suggestions?

P0456 - Evaporative Emission System Leak Detected (Very Small Leak)
The powertrain control module (PCM) monitors the complete evaporative emission (EVAP)
control system for the presence of a very small fuel vapor leak. The system failure occurs when a fuel vapor leak from an opening as small as 0.508 mm (0.020 inch) is detected by
the EVAP running loss monitor test.
Possible Causes:
• Very small holes or cuts in the fuel vapor hoses/tubes
• Loose fuel vapor hose/tube connections to the EVAP system components
• EVAP system component seals leaking. See the Possible Causes for DTC P0442
Diagnostic Aids:
Check for a missing fuel filler cap or the integrity of the cap.
Check for loose or damaged vapor hoses. Visually inspect the EVAP canister inlet port, CV solenoid filter, and canister vent hose assembly for contamination or debris.
Application Key On Engine Off Key On Engine Running Continuous

Nov 21, 2013 | 2006 Ford Mustang V6

1 Answer

I have 2003 chevy express cargo van 2500 w/4.8 v8 has engine code p0300, seems like entire passenger side of motor not firing , although there is spark at each coil pack, i can pull each plug wire of on...

Trouble Code: P0300

Multiple Cylinder Misfire Detected
Possible Causes:

Base engine mechanical fault that affects one or more cylinders.EGR valve is stuck open or PCV system has a vacuum leak
EVAP system problem or the EVAP canister is fuel saturated
Fuel metering fault that affects more than one cylinder
Fuel pressure too low or too high, fuel supply contaminated
IC control circuit is shorted to ground (an intermittent fault)Ignition system fault (a coil) that affects more than one cylinder
MAF sensor contamination (it can cause a very lean condition)TSB 03-06-04-030 contains a repair procedure for this code

Sep 15, 2013 | Cars & Trucks

1 Answer

Where is evap emission

Your evap emission system is your pressurized fuel system. If you are getting a check engine light and the scan is throwing an evap code start by changing your fuel cap. It is the cheapest part of the system and quite common to fail. Unfortunately if you change your cap and erase your fault codes and the check engine light returns for evap system again, you will probably end up at the dealership to track down the leak.

Apr 20, 2013 | 2005 Buick LaCrosse

2 Answers

Obd code p0457 fuel cap replaced mil reset defect not cleared connection checked ok

The code is for a large leak in the EVAP system such as a loose or missing gas cap. But it could also mean a loose or missing hose to the canister or other leak in the tank.
The computer vents the tank several times an hour while the engine is running, and it checks the system by pressurizing the gas tank. If the tank will not hold pressure the code is set.
You may have to check the top of the tank where the fuel pump gasket is, as well as the vent lines to the front of the car.
A mechanic would perform a smoke test to look for leaks.

Jul 23, 2012 | Honda Accord Cars & Trucks

2 Answers

My 1995 subaru legacy lsi cuts out when I rev the engine around 1 rpm. Plus the check engine light is on. I took it to the dealership and they couldn't fix it, but they got a code from the check engine...

code p 0441 refers to evaporative emission (EVAP) system --incorrect flow detected ==== causes --- hose connection/s--- intake leak---EVAP canister purge valve replace the purge valve

May 21, 2017 | 1995 Subaru Legacy

1 Answer

1996 mercury cougar V8 check engine light is on and reading P0172 system to rich (bank 1) how do i fix this

You have at least 10 possible causes

MAF Sensor--issues
Fuel System -with several problems
Evap System-problems

For the inexperienced & to save money,
before heading to the repair shop

Clean the MAF Sensor
Check,not replace,the Fuel Pressure regulator/sensor
The O2 Sensor may be contaminated or worn out

Apr 01, 2011 | Mercury Cougar Cars & Trucks

3 Answers

Code po440 for my 2003 pontiac aztek..what does that mean? Is it seems to be running just fine. it come on like 6 months ago and then went away till yesterday.

This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

Mar 15, 2011 | Pontiac Aztek Cars & Trucks

1 Answer

I have mercedes ml 430. check engine came on at the same time fuel warning light was blinking. took the car to authorized mechanic, they checked and found po455ctrl system grass leak. they reset the check...

it is more likely that the problem is in the EVAP system
code p 0455 refers to evaporative emission(EVAP)system---large leak detected ====causes --hose connections ---intake leak---EVAP cannister---EVAP canister purge valve
I would suggest to you to tell the mechanic to replace the EVAP purge valve as the problem is more likely to be that than the fuel tank

Jul 05, 2017 | Mercedes-Benz ML-Class Cars & Trucks

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