2012 Honda Accord LX 2.4L OBD Codes P0134, P0141, and P0340 - Fault Diagnosis and Repair Guide
I'm experiencing ongoing issues with my 2012 Honda Accord LX 2.4L after replacing the starter. Following the replacement, my OBD-II scanner detected multiple fault codes: P0141 (Bank 1 Oxygen Sensor Circuit Malfunction) and P0340 (Camshaft Position Sensor Circuit Malfunction). I replaced both the oxygen sensor and the camshaft position sensor, but the problem persists. Now, the vehicle is showing additional codes: P0134 (Bank 1 Oxygen Sensor Circuit Malfunction), P0141, and P0340 together. What steps should I take to properly diagnose and resolve these issues? The car continues to exhibit poor performance and check engine light activation.
It's worth checking the wiring harness connections—sometimes a starter replacement can cause loose or disconnected wires, especially around sensor circuits. Consider inspecting the connectors for the oxygen sensors and camshaft position sensor to ensure they're securely plugged in. https://www.obd-codes.com/p0134 https://www.obd-codes.com/p0141 https://www.obd-codes.com/p0340