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2003 GMC Envoy SLT 4.2L Poor Fuel Economy, MIL Lamp on
Vehicle came in with MIL light on and codes P1523 Throttle Plate Position, and P0172 System runs rich bank 1. Hooked-up fuel pressure gauge found pressure to be 55psi, spec call for 54psi. Fuel pressure regulator has no vacuum to it. Is this normal. I did try ...
Summary posted 5/25/2006
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Related Documents & Media | VIN | 1GKDS13S93 |
| Engine | 4.2 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Fuel Economy, MIL Lamp On |
Trouble Codes
| P0172 | Fuel System Too Rich (Bank 1) |
| P1523 | TAC Module Return Performance |
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Vehicle Data
2003 GMC Envoy SLT
| VIN | 1GKDS13S93 |
| Engine | 4.2 L / 6 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Fuel Economy, MIL Lamp On |
Trouble Codes
| P0172 | Fuel System Too Rich (Bank 1) |
| P1523 | TAC Module Return Performance |
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