Code p0340 intermittent po340. have had vehicle in 3 times and shop now says wiring harness needs replacement. can get vehicle to start by pressing gas pedal.

those codes p0340 is bank 1 camshaft position sensor wiring or sensor problem. p0345 is same but for bank 2. double check your work check wiring/connectors e.t.c. good luck

P0340 - Camshaft Position (CMP) Sensor Circuit Malfunction ,did you check the wiring ?
P0340 - Camshaft Position (CMP) Sensor Circuit Malfunction The test fails when the PCM can no longer detect the signal from the CMP sensor.

• CMP circuit open
• CMP circuit short to GND
• CMP circuit short to PWR
• SIG RTN open (VR sensor)
• CMP GND open (Hall effect sensor)
• CMP misinstalled (Hall effect sensor)
• Damaged CMP sensor shielding
• Damaged CMP sensor
• Damaged PCM

Harness routing, harness alterations, improper shielding, or electrical interference from other improperly functioning systems may have intermittent impact on the CMP signal. DR1 DTC P0340: CHECK IF ENGINE WILL START

Note: Refer to the Pinpoint Test Schematic to determine the type of CMP sensor.

• Start engine.

Will the engine start? Yes No GO to DR2 . DTC P0340 is not the cause of the No Start. GO to Section 3 to diagnose the No Start symptom. Is the PCM firing the injectors ?

• Starting Concerns:
  • No Start, Normal Crank

Note: Extended cranking because of a no start can load the exhaust system with raw fuel, damaging the catalytic converter after the engine starts. For applications with Secondary Air Injection (AIR) Systems, perform the following after the no start has been repaired: Disconnect the electric secondary air injection (AIR) solid state relay, run the engine until the surplus fuel is used up, and reconnect the relay (disconnecting the relay may set a Continuous Memory PCM DTC that will need to be cleared).


SYSTEM/COMPONENT REFERENCE (Section 5 Pinpoint Test unless noted)

• Add-on Anti-Theft Devices

• Visual, check with customer.

• Fuel/Ignition

• For LS6/LS8:
• GO to KB85 .
• All others:
• GO to A1 .

• If engine is now a no start:
• If engine will start and run normally at part throttle, check Idle Air Control (IAC) System.

• Engine will now start and run normally at part throttle:
• GO to KE2

• Exhaust System (restrictions)

• GO to HF1

• Base Engine

• Engine System - General Information Section 303-00 of the Workshop Manual.

• Additional Testing

• GO to Z1

DTC code is P0340 no cam signal at PCM. Chrysler always used to say replace the cam and crank sensors together..wouldn't pay our warranty time at dealer unless we replaced both.

http://www.chevyhhr.net/forums/problems-service-repairs-42/reduced-engine-power-engine-shutdown-error-code-p0340-p0601-47411/page2/ Reduced engine power engine shutdown error code P0340 and P0601 Chevy...

P0340: Camshaft Position Sensor A - Bank 1 Circuit Malfunction

- Camshaft Position Sensor harness is open or shorted
- Camshaft Position Sensor circuit poor electrical connection
- Faulty Camshaft Position Sensor
- Faulty starter motor
- Starting system circuit
- Dead (Weak) battery

P0340-P0345 aeall for the "camshaft" postion sensor. It is going out, or a wire to it is intermittantly shorting against a ground. But, is DEFINATELY in the camshaft postion sensor.

any electrical noise in the system may trip the p0340. check plug wires for arcing. the most likely culprit is the alternator. unplug the alternator, and i bet the code can be cleared. had this happen to me once.

I have a 1999 BMW 740 il My SES light came on so I hooked up my OBD code reader p0340 - Camshaft Position Sensor Circuit Malfunction is what came up. so I went to the BMW parts department and bought the Camshaft Position Sensor.
I Replaced the with the new. My SES light was still on so I hooked up the OBD reader again hoping it may reset my SES light but it didn't what did happen is the OBD reader came up with the same code (p0340 - Camshaft Position Sensor Circuit Malfunction) witch is what I just replaced. now I'm at a loss. I'm not sure how to reset my SES light and if I just replaced the Camshaft Position Sensor why dose it the OBD code p0340 still come up. Any suggestions?

P0340 - 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

Causes: 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

Possible Solutions: 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


Test it and keep us updated.

i have 2000 cadillac deville runs really good it has a po340 engine code runs good b when i come to a complete stop the engine idles up and down only at a complete stop what do i need to do