Engine Error
P0186
Fuel Temperature Sensor B Circuit Range/Performance
Severity
Low
Symptoms
Check engine light, fuel trims adjusting incorrectly
Common Causes
- Sensor B reading out of expected range
- Faulty fuel temp sensor B
- High resistance in wiring
- Fuel heating system fault (if equipped)
How to Fix
- 1 Replace fuel temperature sensor B
- 2 Test and repair wiring resistance
- 3 Diagnose auxiliary fuel heater
- 4 Clear code and road test
Estimated Repair Cost
USD
$80
–
$300
Sensor replacement: 100 - 300