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2004 Subaru Impreza WRX 2.0L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on
Posted to Asian Driveability on 9/10/2008 5 Replies

vehicle has a rough idle and hesitation in acceleration. found 3.754 volts at front a/f sensor and rear o2 sensor has 0.075 volts and fluctuates very slowly - never above o.100 volts. short term fuel trim 25%.

5 Replies Received (View Replies)

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car Vehicle Data

2004 Subaru Impreza WRX

VIN JF1GD29624
Engine2.0 L / 4 cyl / GAS
Trans5-speed Standard
DeliveryFI / mpfi
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp On
OccursCold, Under Load, Idle
Misc.Wrx

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0300Multiple Misfire Detected
Message Closed

car Vehicle Data

2004 Subaru Impreza WRX

VIN JF1GD29624
Engine2.0 L / 4 cyl / GAS
Trans5-speed Standard
DeliveryFI / mpfi
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp On
OccursCold, Under Load, Idle
Misc.Wrx

Trouble Codes

P0171Fuel System Too Lean (Bank 1)
P0300Multiple Misfire Detected