P0A02

Motor Electronics Coolant Temperature Sensor A Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–33 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Problems starting the engine
Check Engine indicator on the dashboard
Incorrect temperature readings on the dashboard

Causes

Coolant temperature sensor malfunction
Open or short circuit in the sensor circuit
Poor contact in sensor connectors
Corroded contacts or damaged wiring
Engine ECU malfunction

How to Fix

Check the condition of the coolant temperature sensor
Check the integrity of the wiring and connectors in the sensor circuit
Measure sensor resistance at different temperatures
Check the voltage in the sensor circuit
If necessary, replace the sensor or repair the wiring

Related codes

P0115 P0116 P0117