P0186

Fuel Temperature Sensor B Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–167 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Difficulty starting the engine
Power Loss

Causes

Faulty fuel temperature sensor B
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Problems with the engine ECU

How to Fix

Checking the condition of the sensor connector and wiring
Checking the sensor resistance (comparison with reference values)
Checking voltage and grounding in the sensor circuit
Replacing a faulty sensor
Resetting the error code and checking the system operation

Related codes

P0185 P0187 P0188 P0172 P0175