P2AFE

Engine Coolant Temperature Sensor 4 Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–28 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Difficulty starting in cold weather
Check Engine Light
Incorrect temperature readings on the dashboard

Causes

Malfunction of coolant temperature sensor No. 4
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Contact corrosion
Problems with the engine ECU

How to Fix

Check sensor resistance at different temperatures
Inspect the sensor circuit for damage
Check the contacts in the sensor connector
Replace temperature sensor if necessary
Reset the error code and check for its reappearance

Related codes

P0115 P0116 P0117