What does computer code P0340 98 Chevrolet Silverado mean?

Answer 1

Camshaft Position Sensor Circuit Malfunction This indicates that a problem was detected in the camshaft position sensor circuit. Since it says circuit, that means the problem could lie in any part of the circuit - the sensor itself, the wiring, or the PCM. Don't just replace the CPS (camshaft position sensor) and think that will definitely fix it. Symptoms can include: * Hard starting or no start * Rough running / misfiring * Loss of engine power A code P0340 could mean one or more of the following has happened: * a wire or connector in the circuit could be grounded/shorted/broken * the camshaft position sensor may have failed * the PCM may have failed * there exists an open circuit * the crankshaft position sensor may have failed With a P0340 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try: * Visually inspect all the wiring and connectors in the circuit * Check for continuity in the circuit wiring * Check the operation (voltage) of the camshaft position sensor * Replace the camshaft position sensor as required * Check the crankshaft position circuit as well * Replace circuit wiring and/or connectors as required * Diagnose/replace the PCM as required