Diagnostic Fault Information
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
HO2S Sensor 1
| Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
| HO2S High Signal | P0131, P0171, P1133, P2A00 | P0131, P0133, P0134, P1133, P2A00 | P0131, P0133, P0134, P1133, P2A00 | P0132, P0134, P0172, P0300, P1133, P2A00 | P0133, P0134, P1133, P2A00 |
| HO2S Low Signal | P2A00 | P0131, P0132, P0133, P0134, P1133, P2A00 | P0133, P0134, P1133, P2A00 | P0134, P1133, P2A00 | P2A00 |
HO2S Sensor 2
| Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
| HO2S High Signal | P0137, P0140, P2270 | P0137, P0140, P2271 | P0137, P0140, P2271 | P0138, P0140, P2271 | P0140, P2271 |
| HO2S Low Signal | - | P0137, P0138, P0140, P2270 | P0137, P0138, P0140, P2270, P2271 | P0138, P0140, P2270, P2271 | P2270 |