Injection Pump Fuel Metering Control A High
The P0254 code indicates that the Engine Control Module (ECM) has detected a high voltage signal from the fuel metering control circuit of the injection pump (cam/rotor/injector). This typically means the fuel metering actuator or its circuit is malfunctioning, causing excessive fuel delivery or incorrect timing. The issue can lead to poor engine performance, increased emissions, and potential engine damage if not addressed.
01. Most Common Causes
- Faulty fuel metering actuator
- Short to voltage in the fuel metering control circuit
- Damaged injection pump internal components
- ECM software or hardware failure
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine runs rough or misfires
- Excessive smoke from exhaust
- Poor fuel economy and reduced power
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to verify the code and check for additional codes.
Step 2: Inspect the fuel metering actuator wiring and connector for damage, corrosion, or shorts.
Step 3: Test the fuel metering actuator resistance and voltage supply per manufacturer specifications.
Step 4: If wiring and actuator are okay, test the injection pump internal components or replace the pump.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the issue can cause poor engine performance and potential damage to the injection pump or engine.
How much does it cost to fix?▼
Repair costs typically range from $150 to $500, depending on whether the issue is a simple wiring fix or requires injection pump replacement.