P0546

Symptoms

• Check Engine Light Illuminates
• Emergency engine operation (power limitation)
• Increased fuel consumption
• DPF or catalytic converter errors
• Real overheating of the exhaust system (in rare cases)

Causes

• Broken wire or connector of the EGT sensor
• Malfunction (failure) of the EGT sensor
• Short circuit in the sensor circuit to power
• Real overheating of exhaust gases due to improper engine operation
• Oxidation of sensor connector contacts

How to Fix

1. Inspect the EGT sensor connector and wiring for damage and oxidation.
2. Measure sensor resistance at different temperatures according to specification
3. Check the integrity of the signal wire from the sensor to the ECU
4. If the circuit is broken, restore the wiring or replace the harness
5. If the wiring is OK, replace the exhaust gas temperature sensor
6. Reset the error and make sure it doesn't reappear

Related codes

Error P0546 by Vehicle Brand