Specifically, it means the PCM (Powertrain Control Module) has detected a problem with the circuit related to the camshaft position sensor on the #1 cylinder bank. This sensor is crucial for the engine's timing and operation. The malfunction could be due to several things:
* Faulty Camshaft Position Sensor: This is the most likely culprit. The sensor itself might be failing.
* Wiring Issues: A broken, shorted, or corroded wire in the CMP sensor circuit.
* Connector Problems: A loose, corroded, or damaged connector at either the sensor or the PCM.
* PCM Failure (less likely): While less common, a faulty PCM could also cause this code.
To diagnose and fix this, you'll want to:
1. Check the CMP Sensor: Visually inspect the sensor for damage. If it appears okay, you might need a multimeter to test its resistance and voltage output according to the specifications in your repair manual.
2. Inspect the Wiring and Connector: Carefully check the wiring harness for breaks, shorts, or corrosion from the sensor to the PCM. Clean the connector and ensure a good connection.
3. Check for Intermittent Issues: This code sometimes appears intermittently due to a loose connection. Try jiggling the wiring harness and connector while the engine is running to see if you can replicate the issue.
Important Note: You will need a repair manual specific to your 1997 Chevy C1500 5.7L to find the exact location of the sensor, wiring diagrams, and testing procedures. This information is crucial for proper diagnosis and repair. Attempting repairs without this information could lead to further damage. If you are not comfortable working on your vehicle's electrical system, it is recommended to take it to a qualified mechanic.
