Cadillac P1161: HO2S-22 (Bank 2 Sensor 2) Heater Circuit Malfunction
Is your scanner showing Cadillac P1161?
No worries. We'll show you what it means and how to deal with it.
Cadillac P1161: HO2S-22 (Bank 2 Sensor 2) Heater Circuit Malfunction
OVERVIEWWhat Does The Cadillac P1161 Code Mean?
Engine started; system voltage over 10.0v, HO2S heater enabled, and the PCM detected an unexpected voltage condition on the rear HO2S heater circuit during the CCM test.
What Are The Potential Causes Of The Cadillac P1161 Code?
- Air leaks present in the exhaust manifold or the exhaust pipes
- HO2S heater control circuit is open or shorted to ground
- HO2S heater power
How Can You Fix The Cadillac P1161 Code?
If DTC P0135, P0141, P0155, P0161, P1141 and P1141 are set, check Fuse 43 located in the ECM housing for a problem
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> A-Premium O2 Oxygen Sensor Upstream Downstream Replacement
>>> GM Genuine Parts 12633238 Engine Control Module
>>> GM Genuine Parts 12617944 Exhaust Manifold Gasket
>>> Autobahn88 Silicone Vacuum Hose Dress Up DIY Kit
>>> Vacuum Connector Assortment,Automotive Vacuum Tubing Connector
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
Cadillac P1161, DTCDECODE.
