For a long time now my car has been throwing a P0300. I took it into the dealership to see what they thought and they didn't think anything of it. They figured it was a dirty throttle body and sent me off about my day. Please keep in mind this is before I started to Mod my car. Just a few weeks ago BennyHHR tuned my car and a few stored codes came to his attention. The obvious P0300 and a stored code P0171. Joe instantly knew what it was and he showed me this TSB about LE5 Injectors.



#08-06-04-001B: Check Engine Light On, DTCs P0171, P0300, P1174 Set (Perform Injector Test, Replace Injectors and Reprogram ECM, If Necessary) - (Apr 21, 2009)


Subject: Check Engine Light On, DTCs P0171, P0300, P1174 Set (Perform Injector Test, Replace Injectors and Reprogram ECM, if Necessary)


Models: 2006-2007 Chevrolet Cobalt, HHR

2006 Pontiac Pursuit (Canada)

2007 Pontiac G5, G6

2006-2007 Saturn ION

with 2.4L Engine (VIN B, P - RPO LE5)

Condition
Some customers may comment on the check engine light being illuminated.

A scan tool may reveal DTC P0171, P0300 or P1174 set as current or in history.

Cause
This condition may be caused by the plugging of one or more of the injector director plate orifices which results in a lean condition.

Correction
Important: This condition cannot be corrected by cleaning the injector(s).

Important: For Chevrolet and Pontiac vehicles, reprogramming must be done using the remote method.

For Saturn vehicles, reprogramming must be done using the pass-through method.


Follow the published diagnostics in SI for any DTC recorded.

Perform an injector balance test using the Active Fuel Injector Tester (AFIT), CH-47976. Refer to the Fuel Injector Diagnosis (w/CH47976) procedure in SI. If any injector is identified as having a lean condition, replace all four injectors with the revised injectors. After installing the new injectors, reprogram the ECM with updated calibration files using the TIS2WEB Service Programming System (SPS) application. There are two calibration part numbers that are valid for "Engine Operation". Select the part number with the description that reads for vehicles with second design injector. The injector has a dark blue overmold color for this repair.

Important: The fuel injectors must be replaced and the new calibration files must be installed to ensure a complete repair. Failure to perform both repairs will result in the customer returning with the same condition.

If a vehicle returns with the same condition after having this repair performed, the technician should first verify that the complete repair was performed before continuing with SI diagnostics.

Parts Information
Part Number Description Qty

12625029 Injector, Fuel 4




I will be going back into the dealership pretty soon to see what they say about this. I trouble shooted the entire issue (Swapping plugs, coilpacks, etc). The issue is the injectors because misfires shift between cylinders when i change them around. Oh yeah, my cat is currently roasting at 1,740 degrees. Thank god for Dashhawk.

Who else here has gone in for this exact issue?

 

I haven't had this happen but I have heard of this issue happening. I may have had this issue when I drove out to Ohio last year cause my CEL came on but since the car was running ok I figured I'd ignore it until I came home. Of course when I got back to NJ it went out and hasn't come back on since so I guess it corrected itself.

Either that or my car doesn't like my sister and her kids.

 

this might explain why my car runs a little lean... no cels tho


crap wait im an 08... idk but it runs slightly lean

 

Could be because you're not tuned on all of those mods?

 

maybe...

 

What engine did you have with the problem?

 

if you read the first post at all. the 2.4L LE5