Injection Pump Fuel Metering Control B Circuit High
The P0258 code means the vehicle's onboard diagnostic system has detected: Injection Pump Fuel Metering Control B Circuit High. This is a critical severity code.
- 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
- No-start or hard starting
- Fuel pressure uncontrolled
- Engine stalls
Probable Causes (Ranked by Likelihood)
- Open circuit in metering control B wiring Very High
- Burned-out metering control B valve coil High
- Disconnected connector Moderate
- PCM driver B open circuit Low
Step-by-Step Diagnostic Procedure
-
Measure metering control B resistance. Infinite ohms confirms open coil.
-
Check connector is seated.
-
Test wiring continuity from PCM to valve.
-
Replace valve if wiring is intact.
Frequently Asked Questions
What does circuit high mean for metering control B?
An open circuit means no current flows to the valve, so it cannot control fuel metering.
Can the valve be tested with 12V?
You can briefly apply 12V to test if the solenoid clicks, but extended testing should be done at the correct duty cycle with a scan tool.
How much does the metering valve cost?
The valve itself typically costs $100-$300. Labor to access and replace it on the injection pump adds $100-$500 depending on the vehicle.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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