P2252
DTC P2252: A/F Sensor (Sensor 1) AFS - Terminal Low Voltage1. 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 the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the A/F sensor (Sensor 1) 4P connector, and ECM/PCM connector A (31 P).
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, substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.
NO - Replace the A/F sensor (Sensor 1).