How to fix po134 sensor

O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1

the bank one sensor is either disconnected are faulty.

the bank one sensor is the sensor in the exhaust of the rear cylinder bank of the engine cylinders 1,2,3, the sensor is the one before the catalytic converter. U will need an O2 semnsor socket to remove it or in some cases a 7/8" open end wrench will do.

P0340 OBD-II Trouble Code
Technical Description
Camshaft Position Sensor Circuit Malfunction

What does that mean? 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
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