Question about 1999 Mercury Villager

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Can you by pass a service engine light soon an make it go out

My ckp sensor is bad can i by pass it and make the light go out

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  • doros75 Dec 01, 2008

    Your Info was verry helpful. How do I by pass a sensor

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Any light or switch can be bypassed, but when you go to get the vehicle inspected and they put it on their machine its going to fail. Why not just find out whats causing the problem and fix it.

Posted on Dec 01, 2008

  • James Tepfenhart
    James Tepfenhart Dec 02, 2008

    remember I said any light or switch can be bypassed not a sensor. If you want the light to go out you can bypass the light, and make it go out. the sensors were made to not be bypassed. You would have to learn a lot about electrical engineering, and wiring. I could do this I don't know about the average Joe. You would need to figure out what makes the sensor look for what its doing and then loop it out or take it out and not just anyone can do that without setting off a lot of other sensors. Like I said, its easier to find out what sensor is going off and fix it.



    Do you know what sensor is bad, or going off? Your post just says ckp sensor I don't know what that is. can you explain.



    Also, most auto part stores will put your car on a computer for free now and tell you what sensors are bad. Just a thought.

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How to change crankshaft sensor on a 2001 cad catiera


Its on the side of the block firewall side ... REMOVAL Numbers in text in parenthesis correspond to numbered components in image. Disconnect the wiring harness (1) from the Crankshaft Position (CKP) sensor pigtail. Securely attach a scrap piece of wire about 36 inches long to the CKP sensor pigtail. Later, this piece will be used as a pull wire to guide the new sensor pigtail back through the same routing. Raise and support the vehicle. Remove the oil filter and capture any lost engine oil in a container. Loosen the oil cooler lines at the engine block. Back out the fittings far enough in order to gain sufficient clearance for the sensor pigtail connector to pass between the oil cooler lines and the side of the engine block. Remove the fastening bolt for the CKP sensor (1). Remove the CKP sensor and the O-ring seal from the engine block. Remove the CKP sensor pigtail. Observe the routing of the pigtail. Gently pull the CKP sensor pigtail down through the routing path and out. Guide the pigtail connector along the top of the oil cooler lines around to the side of the engine block. Pass the connector between the lines and the block at the point of the widest gap. Stop when the pull wire is exposed at both ends of the routing path. Disconnect the sensor from the pull wire. INSTALLATION Securely attach the CKP sensor pigtail to the lower end of the pull wire. Pass the pigtail connector between the oil cooler lines and the engine block. Using the pull wire as a guide, pull the sensor pigtail along the top of the oil cooler lines and around to the rear of the engine. Use the pull wire to pull the pigtail into position. Disconnect the pull wire from the sensor pigtail. Connect the sensor pigtail to the harness connector. Thoroughly clean the mating surfaces of the CKP sensor and the engine block. Install the CKP sensor with a new O-ring seal into the engine block. Install the fastening bolt (1) for the CKP sensor. Check the harness for proper routing. Make sure that the wiring cannot come in contact with the exhaust manifold. Tighten the oil cooler lines at the engine block. Install the oil filter. Lower the vehicle. Recheck the engine oil level.

Jun 22, 2016 | 2001 Cadillac Catera

1 Answer

What is code p0727


Possible causes
- Faulty Crankshaft Position (CKP) Sensor
- Crankshaft Position (CKP) Sensor harness is open or shorted
- Crankshaft Position (CKP) Sensor circuit poor electrical connection
- Communication error between the Engine Control Module (ECM) and Transmission Control Module (TCM)

The P0727 Codes is triggered when the TCM receives no signal from the ECM.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0727 Description
The Engine Control Module (ECM) monitors the engine speed through the Crankshaft Position (CKP) sensor with the engine running, and send signal to the Transmission Control Module (TCM).


May 06, 2015 | Cars & Trucks

1 Answer

P1336 gm code


P1335 CHEVROLET P1335 CHEVROLET - Crankshaft Position Circuit Possible causes
- Faulty Crankshaft Position Sensor
- Crankshaft Position (CKP) Sensor harness is open or shorted
- Crankshaft Position (CKP) Sensor circuit poor electrical connection help.png Help with this
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- Engine Stall
P1335 CHEVROLET Description
The Crankshaft Position (CKP) sensor sends pulses to the Powertrain Control Module (PCM) as the reluctor wheel teeth rotate past the CKP sensor. The PCM uses the CKP pulses to synchronize the ignition and fuel injector operation, and to time the interval between each CKP pulse. The PCM determines when an excessive change in crankshaft speed occurs by comparing each new time interval with the previous interval. A misfire causes an unexpected change in the crankshaft speed. A certain amount of acceleration/deceleration is expected between each firing stroke, but if the crankshaft speed changes more than an expected amount, the PCM interprets this as a misfire. The interval between CKP sensor pulses is extremely small. At high engine speeds, slight variations in the following components make misfire detection difficult:
- Crankshaft
- Reluctor wheel
- CKP sensor
The PCM learns variations during the Crankshaft Position System Variation Learning Procedure. The PCM compensates for these variations when performing detect misfire calculations. Only a scan tool can command the PCM to perform the Crankshaft Position System Variation Learning Procedure again.
Perform the learning procedure after the following actions:
- A PCM replacement
- Any operation or repair involving the crankshaft, the CKP sensor, or the CKP sensor to reluctor wheel gap relationship.
- An engine replacement.
- The ignition switch is in the ON position until the battery is drained.


Read more: http://nissanhelp.com/diy/obd_codes/p1335_chevrolet.html#ixzz37IoD1Imx

Jul 12, 2014 | 2001 GMC Safari

1 Answer

Honda civic ferio 2002. when driving at heavy traffic checklight appears and some times the engine stops. It restarts but the checklight does not dissapear. After scanning they refer the problem is in the...


the check light glows at ever engine, stall, below about 300 rpm

the engine stalls and the CEL glows, this is 100% normal and is the same deal key on, no started. it only means you have power to the ECU/PCM and is basically happy (rudimentary self tests pass)

there many are reasons (0ver 50 ) to cause a stall.

but of the check light glows running and over 800rpm

800 RPM (got a dash tachometer. next time see what i does)

if the CEL glows engine running that is the warning that there are

errors. not reporting the actual DTCs here, is a big issue.

each DTC has specific cause. 335? DTC?

P0340, 355, 336

and RPM dead cranking,

the ECU will infact set DTC for CKP pulse, 1 in 10 missing

it does that and you can be sure its not fibbing.



on many cars, (on engine option (size) stated, so....????)

1.7L or 2.0L? (auto or manual tranny)

the car dies the instant you loose the CKP, the crank sensor

but not all. on dizzy cars, (distributor) it runs with a cam sensor good.

but id bet yours needs the CKP to run.

if your DTC error decodes to bad CKP then you can believe that.

this assumes you did not lose, 12vdc electr. power to the EFI system.

or the wires are damage to any ckp or cmp sensor.



again, post the DTCs?

if confused or are a real serious DIY (most arent) go to

alldata.com and look, look up your DTC and read the reasons.

they are clear.



i just looked on line, this car even has a CKP learning procedure

do not knee jerk sway any sensor, read the FSM

see the tests to be sure its bad,

see the Vref test at the sensor, if that is bad, the sensor can no work.

eg: 336

Engine running, and the PCM detected the Crankshaft Position (CKP) Sensor \'A\' signal was missing for a short period of time. Note: This trouble code is usually caused by an intermittent fault. Possible Causes:



  • * CKP Sensor \'A\' signal circuit is open or shorted to ground


  • * CKP Sensor \'A\' signal circuit shorted to VREF or system power


  • * CKP Sensor \'A\' is damaged or has failed


  • * PCM has failed


try pulling it cleaning the connector and putting it back, (at the least)





alldata.com, or get a real FSM for #1 top, support. from Honda or helm.

Dec 14, 2013 | Honda Civic Cars & Trucks

2 Answers

Ght comes on when passing gear is kicked in and starts losing power but when moter is turnd off and cranked up the light is out till the passing gear is kicked in again


what kind of light,check engine, abs,traction control? usually if the check engine light or service engine soon light comes on under heavy acceleration it leads to a bad O2 sensor. check the ECM for history codes.

Jun 13, 2012 | GMC Sierra 1500 Cars & Trucks

1 Answer

I have ford crown victoria 2004, engine is missing ,code is P316. Any solution?


P0316 FORD - Misfire Detected On Startup First 1000 Revolutions Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Engine fails to start
- Engine runs rough Possible causes - Crankshaft Position (CKP) sensor harness is open or shorted
- Crankshaft Position (CKP) sensor circuit poor electrical connection
- Faulty Crankshaft Position (CKP)
- Ignition System
- Fuel Injectors
- Running out of fuel
- Fuel Quality

Feb 16, 2012 | 2002 Ford F150 Regular Cab

1 Answer

Ford 2003 escape codes readed


Cauases or fault codes are not cut and dry, but here are the possible causes of codes P0316 and P0306 which are related codes.
P0316 - Engine Misfire Detected on Startup
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Engine fails to start
- Engine runs rough Possible causes - Crankshaft Position (CKP) sensor harness is open or shorted
- Crankshaft Position (CKP) sensor circuit poor electrical connection
- Faulty Crankshaft Position (CKP)
- Ignition System
- Fuel Injectors
- Running out of fuel
- Fuel Quality
- Faulty Engine Control Module (ECM) P0306 - Cylinder 6 Misfire Detected Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Lack/loss of power
- Hard start
- Engine hesitation
Possible causes - Faulty spark plug 6
- Faulty ignition coil 6
- Ignition coil 6 harness is open or shorted
- Ignition coil 6 poor electrical connection
- Clogged or faulty fuel injector 6
- Injector 6 harness is open or shorted
- Injector 6 poor electrical connection
- Improper spark plug 6
- Insufficient cylinder 6 compression
- Incorrect fuel pressure
- Intake air leak

Jan 17, 2012 | Cars & Trucks

1 Answer

What is code P1351


Dec 30, 2011 | 2003 GMC Yukon Denali

1 Answer

Engin light is on when i check it by computer it gives me error P1336 [25,10,13,36] , please refer to relevant terchnical manual


The crankshaft position (CKP) system variation learn feature is used to calculate reference period errors caused by slight tolerance variations in the crankshaft, and the CKP sensors. The calculated error allows the powertrain control module (PCM) to accurately compensate for reference period variations. This enhances the ability of the PCM to detect misfire events over a wider range of engine speed and load.

The code P1336 is for a Crankshaft (CKP) and/or Camshaft (CMP) position sensor input signal to PCM concert. It is triggered if the input signal to the PCM for either of these sensors is erratic. Per the factory service manual, this can be due to:
- a damaged PCM
- damaged CKP sensor
- damaged CMP sensor
- base engine
- harness concerns.

The service manual suggests checking the following items:
- harness routings,
- alterations,
- improper shielding,
- or electrical interference from other improperly functioning systems.

To properly check the operation of the CMP and CKP, you'll really need an oscilloscope. The code is probably being triggered due to a faulty sensor or connection and not something that just needs to be reset.

Step / Action / Yes / No

1. Did you perform the Diagnostic System Check-Engine Controls?
Yes: Go to Step 2
No: Go to Diagnostic System Check - Engine Controls

2. Preform the CKP system variation learn procedure. Refer to CKP System Variation Learn Procedure. Did you complete the action?
Yes: Go to Step 3
No: Go to Diagnostic Aids

3. Clear the DTCs with a scan tool.
Turn OFF the ignition.
Start the engine.
Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC run and pass?
Yes: Go to Step 4
No: Go to Step 2

4. With a scan tool observe the stored information, Capture Info.
Does the DTC run and pass?
Yes: Go to Diagnostic Trouble Code (DTC) List
No: System OK


Diagnostic Aids:
The CKP system variation values are not stored in the PCM memory after a learn procedure has been performed. If the actual CKP variation is not within the CKP system variation compensating values stored in the PCM, DTC P0300 may set.

The CKP system variation learn procedure is also required when the following service procedures have been performed, regardless of whether DTC P1336 is set.
An engine replacement
A PCM replacement
A harmonic balancer replacement
A crankshaft replacement
Any engine repairs which disturb the CKP sensor relationship

If the CKP system variation learn procedure cannot be performed successfully, check for the following conditions and correct as necessary:
A damaged reluctor wheel
Excessive crankshaft runout
A damaged crankshaft
Interference in the signal circuit of the CKP sensor
A coolant temperature that is not within the Conditions For Running the DTC
The ignition switch is in the ON position until the battery is drained
A PCM power disconnect with the ignition ON may erase the stored value and set the DTC P1336

Hope helps.

May 05, 2011 | 2005 Ford Freestar

2 Answers

2005 nissan almera,1.5letre.. fault code po725


P0725 NISSAN - Engine Speed Signal

The P0725 Codes is triggered when TCM does not receive the engine speed signal from ECM.

The Engine Control Module (ECM) monitors the engine speed through the Crankshaft Position (CKP) sensor with the engine running, and send signal to the Transmission Control Module (TCM).

Symptoms:
- Engine Light ON (or Service Engine Soon Warning Light)

Possible causes:
- Open or shorted CKP sensor circuit condition
- Poor CKP sensor electrical connection
- Check communication error between the ECM and TCM
- Failed CKP Sensor

Possible solution:
Very common problem with Nissan vehicles, usually replacing the Crankshaft Position sensor takes care of the problem.

Keep us updated.

Feb 12, 2011 | 2005 Nissan Altima

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