Fuel Pump Secondary Circuit Low
Table of contents
P0231 CHEVROLET Possible Causes
- Blown Fuel Pump fuse
- Open Fuel Pump Monitor Circuit
- Faulty Fuel Pump Relay
- Damaged Engine Control Module (ECM)
How do I fix code P0231 CHEVROLET?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P0231 CHEVROLET code
The cost of diagnosing the P0231 CHEVROLET code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the code detected
The code will be set if a low voltage on the control circuit of the fuel pump relay is detected by the ECM.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0231 CHEVROLET Description
The Engine Control Module (ECM) supplies voltage to the Fuel Pump Flow Control Module (FPCM) when the ECM detects that the ignition is on. The voltage from the ECM to the FPCM remains active for 2 seconds, unless the engine is in crank or run. While this voltage is being received, the FPCM supplies a varying voltage to the fuel tank pump module in order to maintain the desired fuel rail pressure.