P0063low severityPowertrain
HO2S Heater Control Circuit Low (Bank 2 Sensor 3)
on 2007 Mercedes-Benz S65 AMG 6.0L V12 BiTurbo M275 · RWD
What this code means
The heater circuit for bank 2 sensor 3 is reading low voltage or shorted to ground. This prevents proper sensor warm-up.
Symptoms
- Check engine light on
- Failed emissions readiness
- Reduced fuel economy
Common causes
- Shorted heater circuit wiring
- Faulty O2 sensor heater
- Connector corrosion
- Failed PCM driver
Diagnostic steps
- Scan and confirm code
- Inspect wiring for short to ground
- Measure heater circuit resistance
- Test PCM driver output
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Other Powertrain codes on this vehicle
P0001
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P0002
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P0003
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P0004
Fuel Volume Regulator Control Circuit High
P0005
Fuel Shutoff Valve A Control Circuit/Open
P0006
Fuel Shutoff Valve A Control Circuit Low
P0007
Fuel Shutoff Valve A Control Circuit High
P0008
Engine Position System Performance - Bank 1
P0009
Engine Position System Performance - Bank 2
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1