Question about 2000 Ford Escort

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Check engine light will not turn off '99 Ford zx2

Computer shows problem with camshaft position sensor. Sensor has been replaced 3 times, wiring has been traced with no problems, and timing has been checked and is ok. Please HELP!!

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  • enronloser2 Mar 11, 2009

    The code has been cleared several times. Initially, the light would stay off for about 45 miles now it comes on immediately on the next crank up. I do not know the code, I am about 200 miles from the car right now. I will get that posted as soon as I find out.

  • Curt Downs May 11, 2010

    After the camshaft position sensor was replaced, was the code erased with a scan tool?

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Looks like you have tried everything to turn off the check engine light. However, did you find out the error code for this? Until you resolve the issue, the light will keep coming back. You need to get diagnostics done

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Posted on Mar 11, 2009

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1 Answer

I have a l200 saturn 03 was running with old coil and boots but was misfiring. Replaced coil and boots now wont start will roll over but wont start if does start dies within 1 min. plugged computer in says...


The 2003 Saturn L200 does have a camshaft position sensor. It is located on the bottom front of the engine behind the starter.

You will need to remove the 2-bolts that secure the starter to get to the sensor.

A p0340 fault code is indicative of either:
1.) a faulty camshaft position sensor
2.) Faulty wiring w/in CPS circuitry
3.) Faulty Ignition Control Module or Power-train Control Module
4.) or a mechanical timing fault; involving a damaged, loose, worn, stretched, or broken timing belt.

To diagnose and test the CPS and its wiring circuitry, you would take frequency measurements a designated RPMs to see if it is functioning within specifications...if the correct frequency measurements are within specs- it's not the CPS, wiring circuitry, or PCM/ICM; you're looking at a timing belt fault.

If that's the case (timing belt fault), since you have to tear down a part of the engine, it is recommended that you replace the timing belt, the timing belt tensioner, water pump, and idler pulley.


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Mar 13, 2015 | Saturn Cars & Trucks

1 Answer

2003 jeep grand cherokee. I dove my jeep last nigh had no problem this morning turns over but won't start. Used my code reader and got p0340 cam shaft sensor, replaced that and still having same...


DTC 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

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


Monitor CMP sensor signal on a labscope looking for electrical noise that shows up on the pattern along with the CMP sensor Analog Current (AC) voltage sign wave signal.

Check timing belt alignment specific to the auxiliary shaft gear. There is a diamond on the gear that should align with a diamond on the rear belt cover just above the gear.

If electrical noise is present on the sensor signal, disconnect one coil pack at a time and disconnect the voltage regulator connection on the alternator to identify if the added electrical noise on the CMP signal pattern cleans up indicating the source of the electrical noise.

If no added electrical noise is present on the pattern and the timing gears are properly aligned, check the Dark Blue/Orange (DB/O) wire to verify it is not open between the sensor and PCM pin 85.

Also check the Grey/Red (GY/R) wire to verify it is providing a ground

In checking timing belt alignment, the auxiliary shaft sprocket has a diamond that should align with a diamond on the timing cover at the 12:00 position of the sprocket when the camshaft and crankshaft gears are at the top dead center position. If the Camshaft Position (CMP) sensor signal shows electrical noise on the labscope, disconnect the voltage regulator connection, and the coil packs individually to see if the electrical noise on the signal cleans up pinpointing the area of failure. If electrical noise cleans up when disconnecting a coil pack, remember that any of that pack's plug wires or the pack itself may be causing the noise.

Hope helps (remember to rate and comment this answer)..

Sep 05, 2011 | 2002 Jeep Grand Cherokee

2 Answers

I keep getting a code P0340.Chrysler has reprogrammed the PCM for a long start issue.I cant seem to get anywhere with it.


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


Hope helps.

Apr 24, 2011 | 2003 Dodge Neon

3 Answers

I have a Chevy 2006 Aveo. Two codes came up when the engine check light was put on a scanner. Code P0340 and Code P0133. The check engine light has turned off and on by itself several times in the...


P0340 OBD-II Trouble Code - 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



P0133 OBD-II Trouble Code - Oxygen Sensor Circuit Slow Response (Bank1, Sensor1)

This involves the front oxygen sensor on Bank 1. This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use.

Symptoms: You will likely not notice any drivability problems, although there may be symptoms.

Causes: A code P0133 may mean that one or more of the following has happened:
* The oxygen sensor is faulty
* The wiring to the sensor is broken / frayed
* There is an exhaust leak

Possible Solutions: The simplest thing to do is to reset the code and see if it comes back.
If the code comes back, the problem is more than likely the front Bank 1 oxygen sensor. You will likely wind up replacing it but you should also consider these possible solutions:
* Check and fix any exhaust leaks
* Check for wiring problems (shorted, frayed wires)
* Check the frequency and amplitude of the oxygen sensor (advanced)
* Check for a deteriorating / contaminated oxygen sensor, replace if necessary
* Check for inlet air leaks
* Check the MAF sensor for proper operation


Hope this helps (remember to rate this answer).

Feb 09, 2011 | 1999 Chevrolet K1500

2 Answers

Toyota ipsum 2002 check light comes on with code P1346.


Definition of Diagnostic Trouble Code P1346 Audi: Ignition Coil Power Output Stage 3 Short to B+ BMW: Misfire During Start Cylinder 3 Buick: Intake Camshaft Position [CMP] Sensor System Performance Cadillac: Intake Camshaft Position [CMP] Sensor System Performance Chevrolet: Intake Camshaft Position [CMP] Sensor System Performance Ford: Fuel Level Sensor B Circuit GMC: Intake Camshaft Position [CMP] Sensor System Performance Lexus: VVT Sensor Rang/Performance Problem (Bank 1) Lincoln: Fuel Level Sensor B Circuit Mazda: Fuel Level Sensor B Circuit Mercury: Fuel Level Sensor B Circuit Oldsmobile: Intake Camshaft Position [CMP] Sensor System Performance Pontiac: Intake Camshaft Position [CMP] Sensor System Performance Saturn: Intake Camshaft Position [CMP] Sensor System Performance Toyota: VVT Sensor /Camshaft Position Sensor Circuit Range/ Performance Problem (Bank 1) Volkswagen: Ignition Coil Power Output Stage 3 Short to B+

Mar 12, 2010 | 2001 Toyota Sienna

3 Answers

P0340 code. I Changed cam sensor and checked wiring. what else could be wrong? Jeep cherokee, 6 cil


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

Feb 20, 2010 | 2000 Jeep Grand Cherokee

4 Answers

Trouble codes p0340 and p0014 for a chevy trailblazer engine keeps either idling up real fast or trys to die


You need to check the cam phazer and see if it's damaged. Lots of the time it leaks oil into the connector and messes up the wires. Also I've seen the oil control screens come out of the phazer and go into the engine, which will also set the coeds. If I were you I'd pull the phazer out and see if all 3 of the oil control screens are there. My bet is one will be missing. Make sure to change the oil too. You may get lucky and it will have made it to the oil pan? Other wise I wouldn't worry too much about it. Most of the time it will not cause any engine problems. Good luck, oh and you do have to pull the power steering pump off to get the phazer out. But you can just take the bolts out for the pump and let it fall down so you can get the phazer out!

Nov 26, 2009 | 2002 Chevrolet TrailBlazer

2 Answers

For what sensor is the code po340 on a dodge neon 04 and how i change.


Hi,
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.

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
Thanks.

Jun 28, 2009 | 2004 Dodge Neon

1 Answer

1993 ford taurus, replaced all starting and charging componets still no spark to plugs. Checked all fuses and all fusible links. Replaced key switch, ignition switch,neutral safty...


The camshaft position sensor sends a signal to the PCM, powertrain control module. The PCM then determines spark plug firing. Could be the camshaft position sensor.

1996 is all I have
Camshaft Position (CMP) Sensor 3.0L (2V) Engine
The camshaft position sensor (CMP sensor) (12126):
  • is a single Hall-effect magnetic switch activated by a single vane which is driven by the camshaft (6250).
  • provides camshaft position information which is used by the ignition coil (12029) and the powertrain control module (PCM) (12A650) for fuel synchronization.
3.0L (4V) Engine
The camshaft position sensor (CMP sensor) (6B288) is:
  • a variable reluctance sensor.
  • triggered by the high-point mark on the LH exhaust camshaft sprocket (6256).
-----------------
3.0L (2V) Engine
SPECIAL SERVICE TOOL(S) REQUIRED Description Tool Number Syncro Positioning Tool T95T-12200-A
sth~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Prior to removal of the camshaft position sensor (CMP sensor) (12126), set cylinder No.1 to zero degrees top dead center (TDC) of compression stroke. Then note the position of the camshaft position sensor electrical connector. The installation procedure requires that the connector be located in the same position.
Removal
  1. Disconnect battery ground cable. Refer to Section 14-01 .
  1. Disconnect engine control sensor wiring connector from camshaft position sensor.
  1. Remove camshaft position sensor retaining screws and camshaft position sensor from camshaft position sensor housing.
  1. If removing camshaft position sensor housing from the cylinder block (6010), proceed with Removal Step 5. If not removing camshaft position sensor housing, proceed to installation Step 6.
  1. Remove hold-down clamp (bolt and washer assembly).
  1. Remove camshaft position sensor housing from cylinder block.
Installation
  1. sth~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: A special service tool such as Syncro Positioning Tool T95T-12200-A must be obtained prior to installation of the replacement camshaft position sensor. Failure to follow this procedure will result in improper camshaft position sensor alignment. This will result in the fuel system being out of time with the engine, possibly causing engine damage.
    Attach Syncro Positioning Tool T95T-12200-A as follows:
    1. Engage camshaft position sensor housing vane into the radial slot of the tool.
    1. Rotate tool on camshaft position sensor housing until tool boss engages notch in camshaft position sensor housing.
  1. Pre-lubricate synchronizer gear with engine oil meeting Ford specification ESE-M2C123-A prior to assembly.
  1. Install camshaft position sensor housing so that drive gear engagement occurs when arrow on locator tool is pointed approximately 75 degrees counterclockwise from the rear face of the cylinder block. This step will locate camshaft position sensor electrical connector in the pre-removal position.
  1. Roatate Syncro Positioning Tool T95T-12200-A clockwise slightly. This will engage oil pump intermediate shaft. Push downward while adjusting Syncro Positioning Tool T95T-12200-A until the Syncro Gear engages the camshaft gear.
  1. When synchronizer flange is fully seated against block, the installation tool should be facing counterclockwise of engine centerline approximately 33 to 45 degrees.
  1. Install hold-down clamp (washer and bolt) and tighten bolt to 19-30 Nm (14-22 lb-ft).
  1. Remove Syncro Positioning Tool T95T-12200-A.
  1. sth~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: If camshaft position sensor electrical connector is not positioned properly, DO NOT reposition the connector by rotating the camshaft position sensor housing. This will result in the fuel system being out of time with the engine, possibly causing engine damage. Remove the camshaft position sensor housing and repeat installation procedure, beginning with Step 1.
    Install camshaft position sensor and retaining screws. Tighten screws to 1.5-4.0 Nm (13-35 lb-in).
  1. Connect engine control sensor wiring connector to camshaft position sensor.
  1. Connect battery ground cable.
824fa44.gif
Item Part Number Description 1 T95T-12200-A Syncro Positioning Tool 2 — Water Outlet (Part of Intake Assy) 3 9424 Intake Manifold 4 N602704-S Screw and Washer 5 12126 Camshaft Position Sensor 6 12A362 Synchronizer Assembly 7 12270 Hold-Down Clamp A — Tighten to 1.5-4 Nm (13-35 Lb-In) B — Tighten to 19-30 Nm (14-22 Lb-Ft)

Apr 04, 2009 | 1993 Ford Taurus

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