I have a diagnostic code 340 and 320 on a 1997 Jeep Cherokee. What might the problem be?

DTC P0340 - Camshaft Position Sensor Circuit Malfunction
Symptoms can include:

• Hard starting or no start
• Rough running / misfiring
• Loss of engine power

• 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

• 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

Po320 ignition distributor speed input circut malfunction'''..............................................................
po 340 No camshaft signal being received by the computer

I would replace the cam sensor then clear the computer

This cam shaft will clear rhe 320 code too

Let me know if i can help more