Engine Error
P0169
Incorrect Fuel Composition
Severity
Medium
Symptoms
Engine pinging, poor fuel economy, hard starting
Common Causes
- Excessive water or contaminants in fuel
- Wrong type of fuel added (e.g., E85 in a non-flex vehicle)
- Failed flex fuel sensor
- Wiring issue to the composition sensor
How to Fix
- 1 Drain and flush the fuel tank
- 2 Replace the fuel filter
- 3 Replace flex fuel sensor
- 4 Repair sensor wiring
Estimated Repair Cost
USD
$150
–
$600
Fuel flush: 200 - 400; Flex fuel sensor: 150 - 350