P0260 - Injection Pump Fuel Metering Control 'B' Intermittent
Code P0260 indicates an intermittent fault in the fuel metering control circuit 'B' of the injection pump, which may involve the cam, rotor, or injector. This typically points to a problem with the fuel injection pump's internal metering unit or its control circuit, often related to the pump's electronic control module or wiring. The condition can cause erratic fuel delivery, leading to performance issues.
1. Most Common Causes
- Intermittent failure of the fuel metering control valve (IMV/VCV) on the injection pump
- Loose, oxidized, or corroded electrical connections in the pump control circuit 'B'
- Wiring damage due to chafing, heat, or moisture in the injection pump harness
- Intermittent internal failure of the injection pump (wear of mechanical or electronic components)
- Poor connection at the injection pump connector
- Intermittent ECM failure in controlling the metering actuator
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Loss of power or poor acceleration
- Hard starting or stalling
3. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Visually inspect wiring and connectors for damage or corrosion.
Step 3: Test the metering control solenoid resistance and compare to specs.
Step 4: Check fuel pressure and injection pump timing.
Step 5: Perform a bidirectional test of the metering control using a scan tool.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause poor engine performance and potential stalling, which may lead to unsafe driving conditions.
How much does it cost to fix?▼
The cost to diagnose and repair P0260 typically ranges from $50 to $150 for diagnosis, but repair costs can be higher if the injection pump needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.