2005 Ford F-150 Lariat 5.4L Engine P0345 and P0349 Codes After Cam Phaser Replacement
Hello, I own a 2005 Ford F-150 Lariat 5.4L Super Crew 2WD with approximately 170,000 miles. A few months ago, the check engine light came on, and diagnostic trouble codes P0345 and P0349 were detected. I took it to the dealer, who diagnosed a faulty cam phaser and estimated the repair cost at $4,500. I had previously replaced the timing chains around 120,000 miles and spark plugs at 109,000 miles. After researching online, I replaced the driver-side cam phaser along with the Variable Cam Timing (VCT) system. However, the codes P0345 and P0349 persist. What other potential causes could be responsible for these persistent codes? Any advice on further troubleshooting steps would be greatly appreciated.
Start by inspecting the electrical circuits: - P0345: Camshaft Position (CMP) Sensor Circuit Malfunction (Bank 2) - P0349: Camshaft Position Sensor A Circuit Intermittent (Bank 2) >> The fault occurs when the Powertrain Control Module (PCM) fails to detect a signal from the CMP sensor on Bank 2. Please verify that the wiring between the CMP sensor and PCM is intact. Check for loose connectors, corrosion, or physical damage. Also review the freeze frame data to understand the conditions under which the fault occurs. Possible Causes: • Intermittent open circuit • Intermittent short circuit • Damaged sensor shielding • Faulty or damaged CMP sensor