P0544high severityPowertrain
Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 1)
on 2009 Volkswagen CC 3.6L V6 · AWD
What this code means
The PCM has detected a fault in the exhaust gas temperature sensor circuit for bank 1 sensor 1. This sensor protects the aftertreatment system by monitoring exhaust heat.
Symptoms
- Check engine light on
- Reduced engine power
- Possible limp mode
Common causes
- Faulty EGT sensor
- Damaged sensor wiring or connector
- Open or short in circuit
- Poor ground connection
Diagnostic steps
- Scan for codes and note conditions
- Inspect EGT sensor and connector
- Measure sensor resistance vs temperature
- Check wiring continuity to PCM
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