Engine Error
P0178
Flexible Fuel Sensor Circuit Low
Severity
Medium
Symptoms
Check engine light, vehicle runs poorly if E85 is in the tank
Common Causes
- Short to ground in the flex fuel sensor circuit
- Failed flex fuel sensor
- Water in the fuel
- Bad ground connection
How to Fix
- 1 Trace and repair shorted wire
- 2 Replace the flex fuel sensor
- 3 Drain water from fuel tank
- 4 Clean ground terminals
Estimated Repair Cost
USD
$100
–
$400
Wiring repair: 100; Sensor replacement: 150 - 400