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2000 GMC C6500 7.4L MIL Lamp on
Posted to GM Driveability on 11/27/2006 3 Replies

This truck illuminates MIL w/ P1221 and P1120; also will default to limp-in and illuminate "POWER LOSS" light when code sets.

I have very limited data for this vehicle. What I do have tells me that P1221 must be addressed first. Neither of my scanners will p...

3 Replies Received (View Replies)

 
Message Closed w/FIX

car Vehicle Data

2000 GMC C6500

VIN 1GDJ7H1D3Y
Engine7.4 L / 8 cyl
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
Misc.Big Moving Truck

Trouble Codes

P1120TP Sensor 1 Circuit Malfunction
P1221TP Sensor 2 1-2 Correlation
Message Closed w/FIX

car Vehicle Data

2000 GMC C6500

VIN 1GDJ7H1D3Y
Engine7.4 L / 8 cyl
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
Misc.Big Moving Truck

Trouble Codes

P1120TP Sensor 1 Circuit Malfunction
P1221TP Sensor 2 1-2 Correlation