Engine Error
P0257
Injection Pump Fuel Metering Control B Range/Performance
Severity
High
Symptoms
Diesel engine knocking, loss of power
Common Causes
- Clogged fuel injectors
- Failed fuel metering control valve
- Incorrect engine timing
- Bad injection pump
How to Fix
- 1 Clean or replace injectors
- 2 Replace metering valve
- 3 Verify and adjust timing
- 4 Replace injection pump
Estimated Repair Cost
USD
$200
–
$2500
Injectors: 500 - 1,500; Pump: 1,000+