Our 2010 Chevrolet Traverse suddenly stopped starting. It previously ran smoothly, but now it cranks over and makes a sputtering sound—like it's trying to start—but never actually fires up. The starter functions normally, battery voltage is within range, and fuel pressure at the rail is confirmed as good. The only diagnostic code we're getting is P005
I removed the HO2S sensor and found it severely charred. I’ve ordered a replacement, which should arrive Monday. I’ll update here if installing it resolves the starting issue. Thanks for the advice, CJ.
I replaced what I believe is the correct O2 sensor (Bank 2 Sensor 1), but the vehicle still cranks and nearly starts—just doesn’t ignite fully. It’s possible I installed the wrong sensor. I’m now looking for a wiring schematic to confirm proper installation.
Bank 2, Sensor 1 is located on the front bank of the engine, near the radiator and before the catalytic converter—search 'Chevy Traverse O2 sensor location' for visual reference. If you removed a sensor, please share its heater resistance reading. BBBind.com offers free wiring diagrams but can be difficult to navigate. For more accurate and detailed schematics, consider ALLDAT.com (subscription-based), which provides comprehensive references for further troubleshooting.
The engine should start if all systems are functioning properly. However, it's best to resolve the existing fault code first. Check the resistance of the oxygen sensor heater circuit. It should not be open or shorted. If the resistance is normal, verify that there’s a 12V supply to and through the sensor when the key is on and engine off (ECM side). Potential causes for P0050 include: - Failed or damaged heater element inside the HO2S - Open ground circuit in the O2 sensor heater - Open or short in the B+ battery feed (on some models, this may be part of the control circuit) - Less likely: ECM failure For more details, see: p0050