Updating the PCM can only be done by the dealer only as the software is not available elsewhere. If the sensor is prewired, the wiring should be correct.
DTC DTC P2252: A/F SENSOR (SENSOR 1) AFS-TERMINAL LOW VOLTAGE
1. Reset the ECM/PCM.
2. Start the engine. Is DTC P2252 indicated?
YES - Go to step 3.
NO - Intermittent failure, system is OK at this time. Check for poor
connections or loose terminals at the A/F sensor (Sensor 1) and at the ECM/PCM
3. Turn the ignition switch OFF.
4. Disconnect the A/F sensor (Sensor 1) 4P connector, and ECM/PCM connector A (31P).
5. Check for continuity between ECM/PCM connector terminal A16 and body ground.
Is there continuity?
YES - Repair short in the wire between the A/F sensor (Sensor 1) and the ECM/PCM (A16).
NO - Go to step 6.
6. Substitute a known-good A/F sensor (Sensor 1) and recheck.
Is DTC P2252 indicated?
YES - Update the ECM/PCM if it does not have the latest software, or
substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the
NO - Replace the A/F sensor (Sensor 1).
Friday, February 17th, 2012 AT 2:47 PM