Fuel Pump Secondary Circuit High
Table of contents
- Possible Causes
- How To Fix
- Tech Notes
- Cost To Diagnose
- When is the code detected
- Possible Symptoms
- Description
P0232 MERCURY 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 P0232 MERCURY?
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.
Tech Notes
- For some models:
- 1. Disconnect the inertia switch harness connector
- 2. Turn key to ON position (Engine OFF)
- 3. Measure voltage of circuit between inertia switch harness connector and ground
- 4. If battery voltage is found, replaced Inertia Switch
- 5. Clear codes
Cost of diagnosing the P0232 MERCURY code
The cost of diagnosing the P0232 MERCURY 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)
P0232 MERCURY Description
The Engine Control Module (ECM) provides ignition positive voltage to the coil side of the fuel pump relay. When the ignition switch is first turned ON, the ECM energizes the fuel pump relay, which applies power to the fuel pump. The ECM enables the fuel pump relay as long as the engine is cranking or running, and crankshaft reference pulses are received. If no crankshaft reference pulses are received, the ECM de-energizes the fuel pump relay after 2 seconds. The ECM monitors the voltage on the fuel pump relay control circuit.