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2003 Alero would not start. Only 7500 Miles. Set for 3 months. Traced problem to a bad crank sensor cable. There was no AC voltage detected at the ignition control module. Replaced the sensor...still no voltage out at the ignition plug side. Bought 1 sensor plug, 8 ft 18 guage wire, 4 ft of plastic wire protector, cut off the old module plug for the other side. Soldered a new cable assembly, rerouted the new assembly, zip tied away from exhaust manifold, pluged it in. Starts like new. Just sayin....Hope this helps someone.

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Posted on Jan 02, 2017


SOURCE: 03 Altima ( 2.5 ) crank position sensor - retired ASE Master Teck

and YOU took much to long to answer --BUT thanks for your attempt -

Posted on Sep 11, 2008

  • 338 Answers

SOURCE: dead cylinders 2003 sebring

it sounds like you may have the wires on the wrong coil. It should be #1 on the #4 coil, and the #3 wire on the #2 coil. you probably have them backwards so 1 and 3 are firing on the exhaust stroke.
the firing order is 1-3-4-2.
they should be hooked like this.


Posted on Jan 24, 2009

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to properly clean and test the egr valve you should remove it from the car. disconnect vacuum, elect connectors, and check the gasket surface both on the manifold and on the base of the valve. you will need to buy or cut a new gasket most likely. when you apply vacuum to the control inlet, you should see the valve lift away from the seat. I use brake cleaner and compressed air to spray clean and blow out the valve just to test it and then go from there depending on what you find ---- one of the vacuum switches that controls it or a faulty vacuum line is a likely possibility also ---- so you should check them also. a vacuum pistol comes on really helpful here.

Posted on Jun 20, 2009

  • 1 Answer


none fire on plug and the coil and the mdule ers good

Posted on Sep 02, 2009

  • 811 Answers

SOURCE: 2000 olds alero shuts off while driving

open gas cap turn key to on position listen for whirling sound ,if not, check fuel pump relay, check for fuel pressure 

Posted on Sep 12, 2009

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2003 oldsmobile alero turns but will not start

Sounds like the computer is dead, or not getting a signal from the crank sensor.
Can you check the crank sensor with a meter, or use a scanner to check data input to the computer ?

Feb 27, 2013 | 2003 Oldsmobile Alero

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My 2003 oldsmobile alero cranks but will not start. I had a fuel pump put in 2 years ago, and the battery cables (new battery) is all in place. I replaced the upper O2 sensor a month ago. Sometimes the...

Try squirting starter fluid or ether into the carb. If it takes over you might have a blocked fuel filter. Then see if you have spark. Just pull the wire and connect to an old plug or get a tester. Make sure your hands are insulated. If you have spark then check timing. Could be the coil if there's no spark. Also could be a Passlock Sensor.

Sep 07, 2017 | 2003 Oldsmobile Alero

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Erreur p0016 on sienna 2003 after change t-belt

The crankshaft position sensor (CKP) and Camshaft position sensor (CMP) work in harmony to control the spark/fuel delivery and timing. They both consist of a reluctor, or tone, ring which passes over a magnetic sensor, which generates a voltage, indicating position.

The crankshaft sensor is part of the primary ignition system and functions as the "trigger". It detects the position of the crankshaft relays that information on to the PCM or the ignition module (depending on the vehicle) to control spark timing. The Camshaft position sensor detects the position of the camshafts and relays the information to the PCM. The PCM uses the CMP signal to identify the beginning of the injector sequence. What ties these two shafts and their sensors together is the timing belt or chain. The cam and crank should be precisely timed together. If the PCM detects that the Crank and Cam signals are out of time by a specific number of degrees, this P0016 code will set.

Symptoms of a P0016 will or may include:
* Malfunction Indicator Lamp (MIL) illumination
* The engine may run but with reduced performance
* The engine may crank but not start
* The engine may exhibit a rattle near the harmonic balancer indicating the tone ring is damaged
* The engine may start and run, but poorly

Causes may include:
* Timing chain stretched, or timing belt skipped a tooth due to wear
* Misalignment of timing belt/chain
* Tone ring on crankshaft slipped/broken
* Tone ring on camshaft slipped/broken
* Bad crank sensor
* Bad cam sensor
* Damaged wiring to crank/cam sensor
* Timing belt/chain tensioner damaged

Possible Solutions:
1. First, visually inspect the cam and crank sensors and their harnesses for damage. If you notice broken/frayed wires, repair and recheck.
2. If you have access to a scope, check the cam and crank patterns. If a pattern is missing, suspect a bad sensor or a slipping tone ring. Remove the cam gear and the crankshaft harmonic balancer and inspect the tone rings for proper alignment and make sure they're not loose or damaged or that they haven't sheared the key that aligns them. If they are properly installed, replace the sensor.
3. If the signal appears normal, then check the timing chain/belt for proper alignment. If it's misaligned, check for a damaged tensioner that may have allowed the chain/belt to slip a tooth or several teeth. Also check that the belt/chain isn't stretched. Repair and recheck.

Other crank sensor codes include P0017, P0018, P0019, P0335, P0336, P0337, P0338, P0339, P0385, P0386, P0387, P0388, and P0389.

Hope helps.

Dec 20, 2010 | 2003 Toyota Sienna

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When Jiffy Lube changed the oil in my 2009 Ford Expedition, they did not reset the "Change Oil" message in the instrument panel. Since I set out on a trip immediately after the service, I can't...

You can leave it,it is a gadget,not tied to any system

You should have an owners manual (still) on a 2009

Never go the Jiffy Lube

Read all the damage and horror stories ,on quick change

Dec 08, 2010 | Ford Expedition Cars & Trucks

1 Answer

My santa fe 2003 model 6 cylinder seems to starve for juice and has no acceleration at times i wondering if it is the Crankshaft Position (CKP) Sensor

If the CKP has died completely there will be very high resistance between the device's electrical connections associated with the open circuit. Furthermore spark delivery to the plugs will be absent. First check that the electrical connection is clean and secure; dirt or corrosion can impair an otherwise healthy CKP signal from getting through. If the CKP suffers from a drop in voltage associated with heat increase this can only be detectable with a voltmeter or oscilloscope with a graphical display; an analogue display voltmeter might just be able to show needle fluctuations due to voltage variation output.

Look at the electrical connector with the CKP:

2 pin socket (magnetic - sine wave output). One pin is 'ground' the other is 'signal'. A voltmeter set to 2 volts AC should measure a signal in the 0.2 to 2 volts range on the 'signal' pin.

3 pin socket (Hall effect, magneto - square wave form output). One pin is 'reference' (5volts), one pin is 'ground' and the third pin is 'signal'. A DC voltage should be detectable in the 0.5 to 1.5 volt range from the 'signal' pin.

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.

How to fix? Check the wiring for continuity and that the electrical connection is clean and secure. Remove the CKP and clean off any dirt build up on the tip.

If you strongly suspect the crank sensor as being at fault it is a relatively inexpensive device to replace.

If the above does not solve the issue I would carry out the exact same diagnostic on the cam position sensor. In fact it is not a bad idea to at least test the cam sensor at the same time as testing the crank sensor as they work on very similar principles and are prone to the same faults. Time spent diagnosing the problem can reduce the amount you spend in dollars on spare parts.

Nov 10, 2010 | Hyundai Santa Fe Cars & Trucks

1 Answer

Shutting down

Try replacing the air filter.

Dec 21, 2009 | 2003 Oldsmobile Alero

1 Answer

My car is not getting any spark from the coil


1. At the coils, check for battery voltage at the Red wires while cranking, the Black wires should be less than 0.05 volts while cranking. Pin 3 at the coils (each wire color at the #3 pin are different) using a scope watch for a 3 - 4 volt pulse signal while cranking. Red wire - battery voltage, Black wire is a ground and the White wire is the signal circuit

2. If there is no pulse signal to the power transistors, using a scanner check the POS counts (Position) should be 179 - 181 while cranking. If inconsistent, check the signal plate (flywheel/flex plate) for damaged teeth. If there is an RPM signal and the POS counts are correct, this crankshaft sensor is good.

3. On the front of the engine, mounted on the oil pan is the crankshaft sensor (REF) reference. Check the AC voltage while cranking, should be a clean sine wave that indicates the Top Dead Center (TDC) position of each piston. White and Black wires in a 2 pin connector

4. Check the Camshaft (phase) sensor AC voltage output. This sensor should also be a clean sine wave. This sensor detects cylinder number. This sensor is located in the front cover facing the cam gear. White and Black wires in a 2 pin connector.

Nov 07, 2009 | 1995 Nissan Maxima

2 Answers


Unplug sensor connector,using a digital volt ohm meter set on ac volts position.Connect the leads to the two pins in the connector of the crank sensor.Then have a helper crank engine over.You should see ac voltage,if not,then your crank sensor is bad.

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