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2008 GMC Sierra 1500 WT 4.8L MIL Lamp on, Engine power reducti
Working on p2138 code. At an idle recieve voltage readings of app-1 .85v and on app-2 .44v. As the accerelator pedal is swept readings fall off on app-1 from a 50% corelation. I back probed circut 1161 at pin #29 pcm and recieved the same reading as backprobin...
FIX posted 8/19/2015
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Message Closed w/FIX
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Related Documents & Media 
| VIN | 1GTEC14C08 |
| Engine | 4.8 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / MPFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp on, Engine Power Reducti |
| Occurs | Always |
Trouble Codes
| P1238 | Fuel Injector 6 Output Circuit Malfunction |
Message Closed w/FIX
Vehicle Data
2008 GMC Sierra 1500 WT
| VIN | 1GTEC14C08 |
| Engine | 4.8 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / MPFI |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp on, Engine Power Reducti |
| Occurs | Always |
Trouble Codes
| P1238 | Fuel Injector 6 Output Circuit Malfunction |
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