P1172 CHEVROLET - Fuel Pump Insufficient Flow
- Faulty Fuel Pump
- Fuel Pump harness is open or shorted
- Fuel Pump circuit poor electrical connection
Tech notesThere is a factory service bulletin for the following Chevrolet Models:
2001-2005 Chevrolet Silverado
2001-2005 Chevrolet Silverado Factory Service Bulletin OBDII Code P1172
- Engine Light ON (or Service Engine Soon Warning Light)
P1172 Chevrolet DescriptionThe fuel pump is located on the left frame rail between the fuel tanks. The Engine Control Module (ECM) provides ignition positive voltage to the coil side of the fuel pump relay. The ECM energizes the fuel pump relay, which applies power to the fuel pump. Fuel is transferred from the rear fuel tank to the front fuel tank in order to ensure all of the usable fuel volume is available to the engine. This Diagnostic Trouble Code (DTC) sets when the ECM commands the transfer fuel pump ON and a predetermined change in the front and rear fuel level sensors does not occur.
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