P2BB5

Engine Coolant Temperature Sensor 5 Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$6–28 (est.)

Symptoms

Unstable coolant temperature readings
Floating engine speed
Increased fuel consumption
Engine overheating
Check Engine Light Illuminates

Causes

Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Coolant temperature sensor malfunction
Wiring harness damage
ECU problems (rare)

How to Fix

Check the integrity of the sensor circuit
Inspect connectors and contacts for oxidation or damage
Replace the coolant temperature sensor if necessary
Check wiring harness for damage
Test the ECU if there are no other faults

Related codes

P0115 P0116 P0117 P0118