Question about 2001 Buick Century

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P0340 im a ford tec for 25 years and bought my daughter this buick real cheap . I need to get it inspected but keep getting codes for cam sensor circuit a p0340 and p0440 for the evap system . car cost me 700 runs good but I don't want to spend any money on it . will some buick man help me . I sure can return help on fords . trannys. and diesles

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  • Buick Master
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Go to the wreckers / junk yards and get good replacement parts
there is no difference between ford and GM technically so if you are a good ford technician , fixing a GM product will be no problem

Posted on Oct 26, 2017


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Posted on Jan 02, 2017



  • 85216 Answers

SOURCE: service engine light

From the GM Factory service Manual:
P0341 - Camshaft Position (CMP) Sensor Performance
The other thing about this code, is that it can be caused by a faulty ignition module, or the cam sensor magnet on the timing chain gear, behind the engine front cover that the sensor mounts to. These possibilities would
require a bit more involved diagnosis than just replacing the sensor related
to the code.
I have done a tech. bulletin search for this code, and come up with nothing.

Again, need to get harness checked, and if wiring OK, further diagnosis of
the ignition system.

Posted on Mar 03, 2009


kris vis

  • 147 Answers

SOURCE: Check engine light on. Code P0440.

wow thermostat >>>> shucks i believe its evep emissions code like faulty gas cap can reset any computer the chck eng light will come on in 50 to 100 miles if not fixed....

Posted on May 08, 2009


Harvey N Tawatao

  • 3854 Answers

SOURCE: code p0440

P0440 is a EVAP leak detected, try changing the gas cap and reseting the ECM to clear the service engine light. If you can not clear the code it takes about three start up with out any issues to clear the code and after 100 start up's the codes will clear from the ECM's history. Note use the GM OEM gas cap for a replacement, anything else is just garbage and you'll be replacing it again with in 6 months. If it's not the gas cap, need to take it to a garage and have them do a smoke test to locate the leak in the system. Good luck and hope this helps, keep me posted. be glad to help

Posted on Jun 08, 2009


  • 1 Answer

SOURCE: Someone please help!!!! I have a 2000 buick

I had a similar problem with my 2000 lesabre. It would cut off while driving, or hesitate then keep running while rpm guage would quit operating. Guage would return to normal function at next start up. After reading several posts here and elsewhere, and consulting with my mechanic, I decided to replace the crankshaft position sensor. My mechanic said he had done this before on this GM engine model. He gave me several possible causes and no guarantees. After replacing the CPS (about $120 including parts and labor), the car has not hesitated or cut off once. This was about a month ago. The problem was worse in hot weather, which my mechanic said was typical.

Posted on Jul 23, 2009


ZJ Limited

  • 17970 Answers

SOURCE: I am getting P0440 EVAP

A code P0440 could mean one or more of the following has happened:

  • The gas cap is not installed or working properly
  • The purge solenoid has failed
  • The canister is plugged and not working properly

Possible Solutions: with a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
  • Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
  • Inspect the EVAP system for cuts/holes in tubes/hoses
  • Inspect for damaged or disconnected hoses around the Evap purge solenoid
  • Check and/or replace the sensor
  • Check and/or replace the purge valve
  • Have a professional use a smoke machine to detect leaks

Keep us updated.

Posted on Nov 15, 2010

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Code P0340 Cam Sensor failure

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98 Windstar 3.8l code p0340 keeps coming

I'm pretty sure that sensor is a two wire, which produces an AC volt signal back to the computer. You would test it with an analog volt meter while the engine is cranking or running.
It could be a problem with the object the sensor is supposed to be "watching" such as the end of the cam shaft.

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1997 tacoma 2.7 cam sensor problem replaced it but still code p0340 so tryed crank sensor

There may be more than one issue. Here's some possibilities:
1. The new sensor you bought is defective. I have run across this problem a few times. Most notably was a mass air sensor for a Maxima that the first 3 NEW sensors were defective right out of the box.
2.Look for oil in the sensors plug socket and the pigtail connector. If oil is present, spray out both the socket and pigtail with brake cleaner. (Be sure to wear safety glasses when doing this)
3. The timing belt tensioner is losing/has lost the ability to keep tension on the timing belt and it's out of time.
4. There's a break or a sort in the wiring. You'll need a schematic and a mutlmeter to check for continuity.
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Apr 21, 2013 | 1997 Toyota Tacoma

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I have 2000 ford focus im working on and I had code po340. so I replaced the cam and crank sensor. It still pops threw the air intake and dies when put in gear. Timming belt is newer and still in time

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

Sep 05, 2011 | 2000 Ford Focus

1 Answer

I get a code 0340 on my 05 PT Crusier. Just started running real bad. step on gas and wants to stall like not getting gas. Can you help? Rc

p0340 is camshaft position sensor A-bank 1 curcuit malfunction, Its very likely you need a new cam sensor. check wiring also, the cam sensor is not expensive.

Apr 20, 2011 | Chrysler PT Cruiser Cars & Trucks

1 Answer

Cam position sensor broke

ok easy fix. this is common on ALL ford w this style cam sensor,3.0 eats them for lunch. the sensor base has bushings like a real distributor, they get wore and fail. you can get new from ford, or reman at auto parts about 100 bucks. they come w the sensor installed but as with either, you need the allginment tool, looks like a little hockey puck, that only come from ford to set up or check engine light wont shut off. it will run without this but poorly. if you need more advice just post a comment to this and ill do my best to advise you

Sep 03, 2009 | 1998 Ford Explorer

2 Answers

Most common cause for code P0340 of 95 Ranger

Hi, the cam shaft sensor will be located Under the hood, center, upper engine area, mounted behind rear of intake manifold, in the engine block.

This is a magnetic or hall effect sensor. It sends a signal to the computer relaying information about shaft speed, position and acceleration or deceleration. This information determines when the fuel/air mixture needs to be ignited and how much mixture is needed for the engine.

The possible causes of failure will be faulty housing or faulty wires as well. A faulty ECM could trigger a false alarm as well. this is highly unlikely but, possible in most cases. The most reported reasons is flat out sensor failure.

May 21, 2009 | 2001 Ford Windstar

1 Answer

03 Taurus with DTC P0340, P1336

I would think it would be just the Camshaft Position Sensor.I looked up the codes and they say pretty much the samething.

P0340 Ford Camshaft Position Sensor Circuit Malfunction

P1336 Ford Crankshaft/Camshaft Sensor Range/Performance

Jan 18, 2009 | 2003 Ford Taurus

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