Injection Pump Fuel Metering Control A Low
The P0253 code indicates that the Engine Control Module (ECM) has detected a low voltage or signal from the fuel metering control circuit of the injection pump, specifically related to the cam, rotor, or injector position. This typically points to a malfunction in the fuel metering solenoid or actuator within the injection pump, which controls fuel delivery based on engine demand. A low signal can result from a faulty actuator, wiring issues, or internal pump failure, leading to improper fuel metering and engine performance problems.
01. Most Common Causes
- Faulty fuel metering solenoid/actuator
- Open or shorted wiring in the metering control circuit
- Failed injection pump internal components
- Corroded or loose electrical connectors
02. Symptoms You Will Notice
- Engine hard to start or no start
- Loss of power and poor acceleration
- Engine stalling or rough idle
- Check Engine Light illuminated
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Visually inspect wiring and connectors for damage, corrosion, or loose connections.
Step 3: Test the fuel metering actuator resistance and voltage supply using a multimeter.
Step 4: Perform a fuel pressure test to verify pump output.
Step 5: If all else is normal, suspect internal injection pump failure and replace pump.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, driving with P0253 can cause severe engine performance issues and potential stalling, which is dangerous. It's best to have the vehicle towed to a repair shop.
How much does it cost to fix?▼
Repair costs vary widely. If it's a wiring issue, it may be under $200. If the injection pump needs replacement, expect $1000-$2000 including labor.