DTC B0102 Hummer
Rear Air Fuel Ratio (A F) Sensor (Bank 1, Sensor 1) IP Circuit High Voltage
Rear Air Fuel Ratio (A F) Sensor (Bank 1, Sensor 1) IP Circuit High Voltage
Description
With the engine running the IPB1 terminal voltage is 2 volts or less, or 5.6 volts or more, for at least 15 seconds. The execution time is continuous and DTCs P0135, P2195, P2238, P2243, P2245, P2251, P2252, P2627, P2628 are not active. NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot.
Cause and Solution
Poor connections or loose terminals at the A F sensor (Sensor 1) and the PCM Open circuit between the PCM and the A F sensor (Sensor 1) Faulty A F sensor (Sensor 1) PCM may need to be updated with the latest software Faulty PCM
Video Guide
Diagnostic Info
- DTC Code: B0102
- Brand: Hummer