2003 GM Avalanche 1500 5.3L V8 P0343 Fault: Camshaft Position Sensor Bank 1 High Circuit Input
I own a 2003 GMC Avalanche 1500 with a 5.3L V8 engine and am currently experiencing Diagnostic Trouble Code (DTC) P0343, which indicates 'Camshaft Sensor A - Bank 1 - High Circuit Input'. The vehicle exhibits hard starting but eventually starts reliably; there are no misfires and the engine runs smoothly under normal conditions. The camshaft position sensor is located behind the intake manifold on the driver's side (Bank 1), as per standard engine layout for this model. I plan to first inspect the wiring harness for damage or corrosion, and if that checks out, I will replace the sensor. I'm seeking confirmation of the exact location and any available diagrams or images showing the sensor placement. Any detailed photos, schematics, or guidance on accessing the sensor would be greatly appreciated.
P0343 (5.3L V8, VIN T, Automatic Transmission) - Camshaft Position (CMP) Sensor Signal Stuck High Possible Causes: • Damaged camshaft reluctor ring • Sensor physically contacting the reluctor ring • Foreign material lodged between sensor and reluctor ring • Excessive camshaft end-play • Wiring routed too close to secondary ignition components • If the issue is intermittent, refer to intermittent fault conditions Location: Behind the intake manifold, near the oil pressure sender on the driver's side (Bank 1) Reference tutorial for visual guidance: https://www.youtube.com/watch?v=WLls4VNo5Oo Additional troubleshooting tips and common fixes available in community discussions. Let me know how it goes after repair!