DTC P2243 Acura
Rear Air Fuel Ratio (A F) Sensor (Bank 1, Sensor 1) VCENT Circuit High Voltage
Rear Air Fuel Ratio (A F) Sensor (Bank 1, Sensor 1) VCENT Circuit High Voltage
Description
With engine running the VSB1 terminal voltage repeatedly fluctuates from a value above 4.8 volts to a value below 3.4 volts, at least 150 times. The execution time is continuous and DTCs P0135, P2195, P2237, P2238, 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 needs to be updated with the latest software
Video Guide
Diagnostic Info
- DTC Code: P2243
- Brand: Acura