Code p0340 i wanted to no what these codes ment i get two readings p1684..i no is the battery..but i dont no what 0340 means

alex metro

• 364 Answers
• Posted on Jul 22, 2008

SOURCE: Error Codes P1684 and P0340

P0340
Camshaft position sensor circuit

• Most likely cause : Camshaft position sensor failed.

Jermaine Johnson

• 81 Answers
• Posted on Jun 15, 2009

SOURCE: Car cut off while driving. Oil light on. Code of P0340

sounds like camshaft positioning sensor.

If you have this problem you will have a difficult time diagnosing what exactly is causing it. The easiest thing to do is to buy another sensor and install it. If this does not fix the problem then you should probably take it to a professional. The reason for this is it will take advanced diagnostic skills and equipment to pinpoint the problem.
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Greg Bernett

• 2993 Answers
• Posted on Jun 24, 2009

SOURCE: Camshaft Position Sensor

P0340 Camshaft Position Sensor "A" Circuit Bank 1 or Single Sensor

P0700 Transmission Control System (MIL Request)

The code P1684 is real easy. The computer is stating that the battery has been disconnected within the last 50 starts.

SOURCE: I have fault codes P1684 & P0340 on my 2002

P1684 The battery has been disconnected within the last 50 starts.

P0340


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

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