P0253 Fault Code

Injection Pump Fuel Metering Control A Low (Cam/Rotor/Injector)

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0253 fault code indicates that the fuel injector pump's fuel metering control circuit is experiencing low voltage. This can be caused by faulty wiring in the circuit, a damaged fuel injector pump, or a faulty fuel injector.

To resolve this issue, the first step is to check the wiring and connections related to the fuel metering control circuit. If any issues are found, they must be repaired. If the wiring and connections appear to be in good working condition, the fuel injector pump should be tested for any damage.

If the fuel injector pump is found to be faulty, it should be repaired or replaced. If the pump is in good condition, then the fuel injector itself needs to be tested for issues.

It is important to resolve this issue as soon as possible, as driving with a faulty fuel injector pump can cause engine damage.

What are the symptoms of the P0253 code?

Here are some possible symptoms of a P0253 fault code on cars:

• Illuminated check engine light
• Poor acceleration or power loss
• Reduced fuel efficiency
• Engine stalling or difficulty starting
• Excessive smoke from exhaust

Note that these symptoms may vary depending on the make and model of the vehicle, as well as the severity of the issue causing the fault code. It is recommended to have the car diagnosed by a professional mechanic to determine the exact cause of the problem.

What causes the P0253 code?

The P0253 fault code on cars is caused by a malfunction in the Injection Pump Fuel Metering Control Circuit of the engine. This could be due to a problem with the camshaft, rotor, or injector within the fuel system. It can also be triggered by damaged electrical connections, faulty wiring, or a failed fuel pressure regulator. Some common symptoms of this error code include engine misfire, reduced power output, and poor fuel efficiency. Proper diagnosis and repair by a qualified mechanic are necessary to remediate this issue.

How to fix P0253?

The P0253 fault code indicates a problem with the fuel injection system. Specifically, it is indicating that the fuel metering control for injector A is too low. Here are some steps you can take to try to fix the issue:

1. Check the wiring: The problem could be caused by damaged or corroded wiring leading to the fuel injection system. Check the wiring for any visible signs of damage or corrosion and repair or replace as needed.

2. Check the injection pump: The issue could be caused by a faulty injection pump. Inspect the pump for any signs of damage or wear. If it appears to be damaged, it may need to be replaced.

3. Check the fuel filter: A clogged fuel filter can also cause issues with the fuel injection system. Check the fuel filter and replace if necessary.

4. Check the fuel pressure: Low fuel pressure can also cause issues with the fuel injection system. Use a fuel pressure gauge to test the pressure and replace the fuel pump if necessary.

If none of these steps resolves the issue, it is recommended to take the vehicle to a professional mechanic or dealership for further diagnosis and repair.