Engine Error
P0091
Fuel Pressure Regulator 1 Control Circuit Low
Severity
High
Symptoms
Engine won't start, severely reduced power, limp mode
Common Causes
- Short to ground in fuel pressure regulator circuit
- Defective fuel pressure regulator
- Failed fuel pump driver module
- Internal PCM short
How to Fix
- 1 Trace and repair shorted wire to ground
- 2 Replace fuel pressure regulator
- 3 Test and replace fuel pump driver module
- 4 Diagnose PCM
Estimated Repair Cost
USD
$100
–
$500
Wiring repair: $100 - $200; Regulator: $200 - $500