P0253 critical

Injection Pump Fuel Metering Control A Low (Diesel)

The P0253 code means the vehicle's onboard diagnostic system has detected: Injection Pump Fuel Metering Control A Low (Diesel). This is a critical severity code.

My Garage →
Keep driving?
No -- stop driving
DIY difficulty
hard
Estimated cost
$200 - $800 (parts and labor)
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Common Symptoms

  • Check Engine Light on
  • Engine may not start
  • Severe loss of power
  • White or black smoke from exhaust

Probable Causes (Ranked by Likelihood)

  • Faulty fuel metering control valve on injection pump Very High
  • Short to ground in metering valve wiring High
  • Fuel contamination affecting metering valve Moderate
  • PCM driver circuit fault Low

Step-by-Step Diagnostic Procedure

  1. Read fuel metering valve commanded duty cycle vs. actual rail pressure on scan tool.

  2. Measure metering valve resistance and compare to spec (varies by manufacturer).

  3. Check wiring for shorts to ground between PCM and metering valve.

  4. Inspect fuel for contamination (water, debris) that could affect the metering valve.

Frequently Asked Questions

What is the injection pump fuel metering control?

It is a solenoid valve on the diesel injection pump that controls how much fuel enters the high-pressure pump, directly controlling rail pressure and engine power.

Can I drive with P0253?

No, this code indicates the engine cannot properly meter fuel. Driving may cause engine damage from incorrect fuel delivery.

Is P0253 a diesel-only code?

Yes, P0253 relates to diesel injection pump fuel metering, which is specific to diesel engines.

Sources

This page is built from documented references. Verify against your own service info before repair work.

P0253 on Diesel, EV & Equipment

The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:

Isuzu moderate Injection Pump Fuel Metering Control 'A' Low Kubota serious Injection Pump Fuel Metering Control A Low

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