Quote:
|
Originally Posted by malexander52
I have a buddy that has an escape throwing the following codes:
P0301
P0351
P0171 and 0174
I am familiar with the 0171 and 0174 and I will guide him in eliminating those lean codes. The 0301 and 0351 are a mystery. The coilpacks and plugs are new and yet the engine still thinks there is a misfire. It runs fine. On cold days it may stall while at a stop light and require a little gas to rev it up. The IAC is brand new so we can rule that out. Throttle response is great. The transmission shifts fine
(up and down). I am wondering if anybody has had any experience with this particular vehicle.
|
P0301 through P0310 - Misfire Detection Monitor
Description:
The misfire detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred. Misfire is defined as lack of combustion in a cylinder due to absence of spark, poor fuel metering, poor compression, or any other cause. ( P0301 would indicate cylinder 1 )
Possible causes:
Ignition system
Fuel injectors
Running out of fuel
EVAP canister purge valve
Fuel pressure
Evaporative emission system
Base engine
P0351 Through P0360 - Ignition Coil A through J Primary/ Secondary Circuit Malfunction
Description:
Each ignition primary circuit is continuously monitored. The test fails when the PCM does not receive a valid IDM pulse signal from the ignition module (integrated in PCM).
Possible causes:
Open or short in Ignition START/RUN circuit
Open coil driver circuit in harness
Coil driver circuit shorted to ground
Damaged coil
Damaged PCM
Coil driver circuit shorted to PWR
P0171 - System to Lean (Bank 1)
Description:
The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. The test fails when the adaptive fuel tables reach a rich calibrated limit.
Possible causes:
For lean and rich DTCs:
Fuel system
Excessive fuel pressure.
Leaking/contaminated fuel injectors.
Leaking fuel pressure regulator.
Low fuel pressure or running out of fuel.
Vapor recovery system.
Induction system:
Air leaks after the MAF.
Vacuum Leaks.
PCV system.
Improperly seated engine oil dipstick.
EGR system:
Leaking gasket.
Stuck EGR valve.
Leaking diaphragm or EVR.
Base Engine:
Oil overfill.
Cam timing.
Cylinder compression.
Exhaust leaks before or near the HO2Ss.
P0174 - System to Lean (Bank 2)
Same as P0171