P00B1

Radiator Coolant Temperature Sensor Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Engine overheating
Cooling fan is not working properly
Unstable engine operation
Check engine light comes on

Causes

Open or short circuit in the sensor circuit
Radiator coolant temperature sensor malfunction
Poor contact in the sensor connector
Problems with the engine control unit (ECU)

How to Fix

Check the integrity of the sensor wires and connectors
Check the resistance of the radiator coolant temperature sensor
Replace the sensor if it is faulty
Check and replace wiring harness if necessary
Check ECU operation

Related codes

P0115 P0116 P0117 P0118