Question about 1997 Ford Thunderbird LX

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Check engine light came on, fault is for the Cam shaft position sensor. I changed the sensor. Didn't work. I changed the whole synchronizer assembly. Didn’t work. I checked the wiring, all good continuity (I didn’t use a break out box, just followed wires). I have read about possible problems with the computer or even the timing chain. Has anyone heard of a similar problem and what were some of the solutions? Thanks,

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  • Ford Master
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OK, on a 1998 Ford Taurus have a service engine soon light. Scanning it said the Camshaft Sensor circuit was bad. So I replaced the camshaft sensor. Cleared the code and it came back.

In the winter time it comes, and in the summer time it goes away (or after a week or so of warm weather).

I think it's a wiring problem or a bad calibration of distance to the reluctor ring.

I think your problem on the 1997 Ford Thunderbird LX is the same thing.

Good luck on the repair.

Posted on Oct 07, 2010

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Posted on Jan 02, 2017

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Pcm?


PCM= Powertrain Control Module. It is the brains of the car, it reads the sensor in put from all sensors including the cam shaft position sensor

May 14, 2014 | 2004 Toyota 4Runner

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CMP - Cam shaft Position Sensor


<p><b><span>3.2) <span> </span><u>CMP - Cam shaft Position </u>(sensor)<u> </u></span></b><br /> <p><b><u><br /></u></b><br /> <p><b><span>What is it?</span></b><span><span> </span>This electrical device is very similar in concept to the crank position sensor (above) in that it detects the position of the rotation of a shaft, in this instance the cam shaft.<span> </span>It is the cam shaft signal that indicates to the ECU that cylinder one is at top dead centre at compression and in the process provides the ECU with the timing reference for fuel injection.<span> </span>The cam shaft sensor provides extra information, to that of the crank sensor, to fine tune timed events such as injection and spark delivery.</span><br /> <p><span> </span><br /> <p><b><span>Where is it located?</span></b><span> The location of this device depends on the design and age of engine.<span> </span>On many modern overhead cam shaft engines the cam shaft sensor is located either on the end, or to the side of the end, of the cam shaft housing.<span> </span>On older pushrod engines the cam sensor is found where the distributor would once have been located.<span> </span>This type sensor assembly makes use of the distributor shaft meshing directly, at its bottom end, with a gear on the cam within the engine block.<span> </span>In this respect the distributor shaft is just an extension of the cam shaft.<span> </span>On the top end of this distributor shaft is a magnetic armature.<span> </span>The cam shaft sensor, that measures the movement of this armature, is located in the cover and uses either magnetic or 'Hall effect' pickup modules.<span> </span></span><br /> <p><b><span> </span></b><br /> <p><b><span>How does it work?</span></b><span><span> </span>The sensor detects the position of a magnet or set of teeth on the gear on the end of the cam.<span> </span>An electrical waveform output signal is sent to the ECU as the cam turns.<span> </span>The cam sensor tells the ECU that cylinder 1 is at TDC on its compression stroke prior to ignition. <span> </span>The cam sensor ensures the correct timing of the fuel injection cycle.<span> </span>If the timing belt ever jumps a tooth on the cam the lack of agreement between the respective signals from the cam and crank sensors is indicated as an error condition by the ECU. </span><br /> <p><b><u><span><span> </span></span></u></b><br /> <p><b><u><span>Symptoms of faulty cam sensor</span></u></b><br /> <p><b><span>Associated OBD2 error codes DTCs: <span> </span>P0341 - P0349; P1345</span></b><br /> <p><b><span> </span></b><br /> <ul> <li><b><span>Hesitant acceleration - </span></b><span>miss-timing of fuel injection due to a faulty CMP can cause intermittent loss of power.<b></b></span></li> <li><b><span>Starting difficulty/failure.<span> </span></span></b><span>If the faulty CMP timing problems are severe they may cause the engine not fire at all, or to fire and then stall, or stall at some random time without warning.<b></b></span></li> <li><b><span>Hot engine stall and failure to restart - </span></b><span>Sometimes the fault of the CSS only manifests itself when the engine is hot.<span> </span>Over time thermal stress can cause cracking and can weaken electrical junctions within the CMP.<span> </span>The CMP may work well at cold start up but can then cause a hot running engine to stop with little chance of restart whilst the engine is still hot;<span> </span>once cooled the down the engine may readily restart and again run for a limited period until hot.</span></li></ul> <p><b><u><span>Note </span></u></b><span>The cam sensor body often protrudes into the cam shaft gallery and when it's 'o' ring seal<span> </span>becomes age hardened, engine oil may leak back into the sensor electrical socket plug connector causing errors due to interruption of signal. </span><br /> <p><b><span> </span></b><br /> <p><b><span>How to check? </span></b><span>It is not technically<b> </b>easy<b> </b>to determine that the CMP is at fault and, like the crank sensor, may require the use of an oscilloscope.<span> </span>If it is part of a sophisticated on board diagnostics system its failure may be logged as a specific error code in the ECU. Due to the variability problems with engine running are often experienced well before any error codes are set by the ECU.</span><br /> <p><span> </span><br /> <p><span><span> </span>2 pin socket (magnetic - sine wave output).<span> </span>One pin is 'ground' the other is 'signal'.<span> </span>A voltmeter set to 2 volts AC should measure a signal in the 0.2 to 2 volts range on the 'signal' pin.</span><br /> <p><span><span> </span>3 pin socket (Hall effect, magneto - square wave form output).<span> </span>One pin is 'reference' (5volts), one pin is 'ground' and the third pin is 'signal'.<span> </span>A DC voltage should be detectable in the 0.5 to 1.5 volt range from the 'signal' pin.</span><br /> <p><span>It is important that the voltage measurement take place at start up when the engine is cold and again, 20 minutes later, when the engine has fully warmed up to operating temperature. Often the voltage output from faulty sensors declines with temperature rise.</span><br /> <p><span> </span><br /> <p><b><span>How to fix?<span> </span></span></b><span>If the CMP failure is due oil leakage into the electrical connector then a thorough clean and a renewal of the oil seal on the CMP may correct the situation.<span> </span>It can be a wise precaution to change the connecting cable as oil migration beneath the insulation may possibly contaminate components at some distance to the CMP.<span> </span></span><br /> <p><span>If the CMP has an internal fault then it must be replaced.</span><br />

on Jul 22, 2011 | Mercedes-Benz E-Class Cars & Trucks

2 Answers

Passing smog


I doubt it as you have stated that it shows a calibration fault . This will be from the variable valve timing assembly on the cam shaft/s that is altering the valve timing. The timing chain may be faulty but you should be hearing it to be that bad.

Apr 03, 2014 | Volkswagen Jetta Cars & Trucks

1 Answer

It won't start


check that the cam shaft is turning. (broken timing belt/chain) check immobiliser is operational. run fault codes and check for cam/crank position sensor fault.

Mar 14, 2014 | 1997 Isuzu Oasis

1 Answer

Quit running will not turn over


run fault codes and check for cam/crank angle position sensor fault. Check that the cam shaft is turning over (broken cam belt) Check operation of the immobiliser and check that the fuel pump is still working.

Jan 03, 2014 | 2000 Chevrolet Blazer

1 Answer

Camshaft position sensor correlation bank 1 code


timing belt is off by a tooth or two. you probably didn\'t have to replace the coolant sensor; that code sets whenever the sensor is disconnected and the ignition is turned on; and it needs to be reset by disconnecting the battery or with a code reader. anyway, the crank/ cam sensors are out of sync. if you\'ve got the twin cam engine, they are a royal pain to get the belt to lay properly on the two cams.

Apr 15, 2013 | 2007 Chrysler PT Cruiser Touring Hatchback

1 Answer

Where is the cam sensor at



Description & Operation

2.5L Engines
On the 2.5L 4cylinder engine the Camshaft Position (CMP) sensor is located in the distributor.
The sensor contains a Hall effect device called a sync signal generator to generate a fuel sync signal. This sync signal generator detects a rotating pulse ring (shutter) on the distributor shaft. The pulse ring rotates 180 degrees through the sync signal generator. Its signal is used in conjunction with the Crankshaft Position (CKP) sensor to differentiate between fuel injection and spark events. It is also used to synchronize the fuel injectors with their respective cylinders.
When the leading edge of the pulse ring (shutter) enters the sync signal generator, the following occurs: The interruption of magnetic field causes the voltage to switch high resulting in a sync signal of approximately 5 volts. When the trailing edge of the pulse ring (shutter) leaves the sync signal generator, the following occurs: The change of the magnetic field causes the sync signal voltage to switch low to 0 volts. 4.0L

The Camshaft Position Sensor (CMP) on the 4.0L 6cylinder engine is bolted to the top of the oil pump drive shaft assembly. The sensor and drive shaft assembly is located on the right side of the engine near the oil filter.
The CMP sensor contains a Hall effect device called a sync signal generator to generate a fuel sync signal. This sync signal generator detects a rotating pulse ring (shutter) on the oil pump drive shaft. The pulse ring rotates 180 degrees through the sync signal generator. Its signal is used in conjunction with the crankshaft position sensor to differentiate between fuel injection and spark events. It is also used to synchronize the fuel injectors with their respective cylinders.
When the leading edge of the pulse ring (shutter) enters the sync signal generator, the following occurs: The interruption of magnetic field causes the voltage to switch high resulting in a sync signal of approximately 5 volts.
When the trailing edge of th4.7L

The Camshaft Position Sensor (CMP) on the 4.7L V8 engine is bolted to the front/top of the right cylinder head.
The CMP sensor contains a Hall effect device called a sync signal generator to generate a fuel sync signal. This sync signal generator detects notches located on a tone wheel. The tone wheel is located at the front of the camshaft for the right cylinder head. As the tone wheel rotates, the notches pass through the sync signal generator. The pattern of the notches (viewed counter-clockwise from front of engine) is: 1 notch, 2 notches, 3 notches, 3 notches, 2 notches 1 notch, 3 notches and 1 notch. The signal from 5.7L V8 Engines

The Camshaft Position Sensor (CMP) on the 5.7L V-8 engine is located below the generator on the timing chain / case cover on the right/front side of engine.

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Fig.

The CMP sensor is used in conjunction with the crankshaft position sensor to differentiate between fuel injection and spark events. It is also used to synchronize the fuel injectors with their respective cylinders. The sensor generates electrical pulses. These pulses (signals) are sent to the Powertrain Control Module (PCM). The PCM will then determine crankshaft position from both the camshaft position sensor and crankshaft position sensor.
The tone wheel is located at the front of the camshaft (2). As the tone wheel rotates, notches (3) pass through the sync signal generator.
When the cam gear is rotating, the sensor will detect the notches. Input voltage from the sensor to the PCM will then switch from a low (approximately 0.3 volts) to a high (approximately 5 volts). When the sensor detects a notch has passed, the input voltage switches back low to approximately 0.3 voltsthe CMP sensor is used in conjunction with the crankshaft position sensor to differentiate between fuel injection and spark events. It is also used to synchronize the fuel injectors with their respective cylinderse pulse ring (shutter) leaves the sync signal generator, the following occurs: The change of the magnetic field causes the sync signal voltage to switch low to 0 volts

Jun 08, 2012 | 1999 Jeep Grand Cherokee

1 Answer

I have the code P1309 (misfire monitor unable)on my F-150, year 2000, 6cyl, 4.2l... i change the camshaft sensor and the light wont turn off then i sincronized it but the check engine light still wont turn...


This is a code for missfire monitor disabled due to a problem with the cam shaft position sensor or wiring; the first thing to do is verify that the cam shaft syncronizer has not been removed/repositioned from the correct setting if it has been moved it is out of time now and will have to be timed with a special tool. If it has not been moved at all I would suggest removing the cam sensor that mounts on the top and inspect the sensor and the syncronizer for damage... if not damage is noticed check the wiring at the plug for loose pins and broken wires, and, if they are fine replace the sensor.

Tests/Procedures:
1. The code P1309 usually sets because the CMP synchronizer is not installed properly, and is "out of time".

2. If the special tool for installing the synchronizer is not available, the synchronizer must be installed with the crankshaft at 26 degrees AFTER TDC on the #1 cylinder COMPRESSION stroke. To find 26 After Top Dead Center (ATDC), set the engine at TDC of #1 compression stroke, then watch the teeth on the Crankshaft Position (CKP) sensor tone ring on the front of the crankshaft. Turn the engine by hand until an additional two and a half teeth on the tone ring have passed the CKP sensor. This will be 25 degrees ATDC (you can estimate 1 more degree from there). Then install the synchronizer so that when it is bottomed out, the skinny vane that rotates through the sensor is centered in the sensor opening.

3. Once the synchronizer and CMP sensor are installed, the misfire profile will need to be relearned. To do this, verify that the fuel level is between 1/4 and 3/4 tank, then drive the vehicle, and do 3 or 4 decelerations from 65 MPH down to 40 MPH without touching the brake pedal.


Hope this helps and just keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer. Thank you for using FixYa.

Jose.

Oct 20, 2011 | Cars & Trucks

1 Answer

Where does the cam position sencer located at


It's officially called a CMP Syncronizer.
There are stern warnings on the page associated with this.
CAMSHAFT POSITION (CMP) SENSOR Removal & Installation
CMP sensor is located on rear of engine, behind intake manifold. Before removing, note position of electrical connector on CMP sensor. Remove upper intake manifold. See UPPER INTAKE MANIFOLD . Disconnect CMP sensor. Remove CMP sensor screws and CMP sensor. To install, reverse removal procedure. Ensure CMP sensor electrical connector is pointing in original direction. Tighten CMP sensor to specification.
2 . Failure to use synchro positioner during installation will cause fuel injection to be out of time and may cause engine damage.
CAUTION: DO NOT rotate crankshaft when Synchro Positioner (T95T-12200-A) is positioned on CMP synchronizer. Armature tab will be damaged and synchronizer timing may be shifted. Removal
1. Position crankshaft to TDC of cylinder No. 1, on compression stroke. Note position of electrical connector on CMP sensor. 2. Disconnect negative battery cable. Unplug harness connector from CMP sensor. Remove CMP sensor screws and CMP sensor from positioner. Remove synchronizer hold-down bolt and CMP synchronizer.
Fig. 2: Exploded View Of CMP Synchronizer Assembly (Typical) Courtesy of FORD MOTOR CO.
CAUTION: DO NOT rotate crankshaft while synchronizer is removed from engine. Installation
1. Install Synchro Positioner (T95T-12200-A) on synchronizer housing. See Fig. 3 . Rotate synchronizer shaft until vane on shaft aligns with slot on synchro positioner. Rotate synchro positioner until engaged into notch in housing. Dip drive gear in engine oil.
Fig. 3: Installing Synchro Positioner On Synchronizer Assembly (Typical) Courtesy of FORD MOTOR CO.
Fig. 4: Positioning Synchronizer For Installation Courtesy of FORD MOTOR CO. 2. Rotate sychronizer assembly so that synchro positioner is 60 degrees counterclockwise of crankshaft centerline before inserting synchronizer assembly into engine. See Fig. 4 . 3. As synchronizer is inserted into engine, synchronizer will rotate. When seated, synchronizer electrical connector should be located in original position.
CAUTION: If CMP sensor electrical connector is not positioned correctly, DO NOT reposition connector by rotating synchronizer. This may cause fuel system to be out of time with the engine, causing possible engine damage or an engine misfire. Remove synchronizer and reinstall. See step 3 . 4. Install hold-down clamp and tighten bolt to specification. See TORQUE SPECIFICATIONS . Install CMP sensor to synchronizer and tighten to specification. Ensure CMP sensor electrical connector is in original position. Reconnect wiring to CMP sensor. Connect negative battery cable.
fig2explodedviewofcmpsy.gif

May 03, 2011 | 1995 Ford Explorer

1 Answer

Check engine light came on, computer scan indicated the cam shaft sensor was bad, changed the cam shaft sensor 3 times and the engine is still studdering and trying to stall. now the computer scan is...


cam sensor it also linked to the crank sensor usually if the cam sensor fails around the same time the crank can become un synced with the replacement. or the new sensor is not the correct one, ie sensor from a 1998 model will sometimes work on a 2005 model if it has the same ecu fitted in the 2005 not the hole ecu but the chip. on the cam sensor there is say in some cases 3 poles positive feed negative and then signal. on all the poles there is a resistance between poles that the ecu reeds. it reads the voltage being used and the signal its receiving if one of these is wrong but it detects one of the readings being right it will think the other sensor is wrong. and thats a mis match. the resistance changes over time.

Jun 21, 2017 | 2005 Chevrolet TrailBlazer

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