P1432
Thermostat Heater Control Circuit Failure
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–67 (est.)
Symptoms
- The engine takes a long time to warm up
- Increased fuel consumption
- Unstable engine operation at idle
- Check Engine Light Is On
- Failure to reach engine operating temperature
Causes
- Open or short circuit in thermostat heater circuit
- Thermostat heating element malfunction
- Problems with the relay or circuit fuse
- Wiring harness damage
- Malfunction of the engine control unit (rare)
How to Fix
- Check heater circuit fuse and relay
- Check the integrity of wiring and connectors
- Measure the resistance of the thermostat heating element
- If necessary, replace the thermostat with heating element
- Check the operation of the system after repair