P0163Mercedes-benz ClaYears: 1996 - 2026
O2 Sensor Circuit Low Voltage (Bank 2, Sensor 3)
Reviewed by ASE Certified Technician
What does this mean?
Code P0163 indicates a problem with the third oxygen sensor on Bank 2.
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Mercedes-benz Cla models manufactured from 1996 to 2026. However, please note that the presence of this specific code depends on your vehicle's exact engine configuration, options, and production year.
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Common Causes
Faulty oxygen (O2) sensor
Failed O2 sensor heater circuit
Damaged, chafed, or broken wiring harness
Exhaust leak before oxygen sensor
Symptoms to Watch For
- Check Engine Light is illuminated
- Decreased fuel economy
- Failed emissions test