Diagnostic Aid
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- The following diagnostics are run in sequence while the vehicle is in decel cut-off HO2S Bank 1 Sensor 2: P2270, P013E, P013A, P2271 HO2S Bank 2 Sensor 2: P2272, P014A, P013C, P2273 At the same time, after P2270 and P2272 run and pass, diagnostics for P015A and P015C are also running. Any accelerator input will stop the tests, causing the sequence to start over.
- After the above tests run and pass, the following diagnostics are run in sequence and are not affected by accelerator pedal input: HO2S Bank 1 Sensor 2: P013F, P013B HO2S Bank 2 Sensor 2: P014B, P013D At the same time, diagnostics for P015B and P015D are also running.