DTC P1197 Audi
O2 Sensor Heater Circuit (Bank 2-Sensor 1) Electrical Malfunction
O2 Sensor Heater Circuit (Bank 2-Sensor 1) Electrical Malfunction
Description
Engine started, battery voltage must be at least 11.5v, all electrical components must be off, the ground between the engine and the chassis must be well connected, the exhaust system must be properly sealed between the catalytic converter and the cylinde
Cause and Solution
HO2S heater power circuit is open
HO2S heater ground circuit is open
HO2S signal tracking (due to oil or moisture in the connector)
HO2S is damaged or has failed
ECM has failed
Oxygen sensor (before catalytic converter) is faulty
Video Guide
Diagnostic Info
- DTC Code: P1197
- Brand: Audi