Question about 2002 Pontiac Grand Am

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2.2engine looking for cam sensor no rpm signal

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Above the starter starter has to come out

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Back of motor right on top of oil pan

Posted on Oct 03, 2009

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Our 1999 Buick century is having problems with running it won't hardly take gas and the transmission won't shift up sometimes the same time the transmission messed up the speedometer quit working


Is the check engine light on ? Have checked for codes , may have transmission codes stored . Check engine light doesn't need to be on for codes to be stored . VSS - vehicle speed sensor is a input to PCM.
The Vehicle Speed Sensor (VSS) is a gear-driven permanent magnet generator housed in the transaxle. The sensor generates a sine wave output with a frequency proportional to the vehicle speed. The Powertrain Control Module (PCM) converts the signal to an output that switches to ground at a frequency of 4000 pulses per mile. The signal (CKT 817) is used by various vehicle components. The signal CKT 817 drives the following components:
• The speedometer
• The odometer May also have problems with mass air flow sensor , crankshaft position sensor , cam sensor etc...
DTC P0336 Crankshaft Position (CKP) Sensor Circuit
The 24X reference signal is used to improve idle spark control at low engine speeds. The PCM uses the 24X reference signal to calculate engine RPM and crankshaft position at engine speeds below 1600 RPM. The PCM constantly monitors the number of pulses on the 24X reference circuit and compares the number of 24X reference pulses to the number of 3X reference pulses and CAM signal pulses being received. If the PCM receives an incorrect number of pulses on the 24X reference circuit, DTC P0336 will set and the PCM will use the 3X reference signal circuit for fuel and ignition control. The engine will continue to start and run using the 3X reference and CAM signals only.
There are a lot of electronic thing's on you Buick that can go haywire causing the problems you have . If you are unfamiliar with these thing's I mentioned , I suggest you take it to a ASE certified repair shop . Some people get irate just mentioning this, It mite save you money in the long run .

Feb 12, 2016 | Buick Cars & Trucks

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Started once no nothing nopower to fuel pump and no fire to plug


What is your year--make--model? It didn't post for some reason? I can't look anything up w/o that info.
Make sure the battery has a full charge.
Usually if no fuel pump--no spark at the plugs and no fuel injector pulse, I want to check for rpm signal, that comes from the crank sensor. Some makes and models the computer needs to see both the cam and crank sensor signals or it won't start.
Don't replace anything unless your testing points in that direction.

Jan 06, 2016 | Cars & Trucks

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Where is camshaft position sensor located on 2007 isuzu truck i290


in what country? USA?

Makin GM Atlas engine atlas LLV engine.
did you look at the engine photos at isuzu dot com yet.
that be free, google "OEM Isuzuk parts."
bingo , all parts in the car, shown.

gas engine. wiki facts.
The LLV (also called Vortec 2900) is a 2,921 cc (178.3 cu in straight-4 DOHC engine, with a 95.5 mm (3.76 in) bore and a 102 mm (4.0 in) stroke. It replaced the LK5 and produced 185 hp (138 kW) at 5600 rpm and 190 lb·ft (258 N·m) of torque at 2800 rpm. Engine redline is 6300 rpm.

first off runs off the cam so must be at the cam.
there are how many ends to cam, answer 2 per cam
just a casual look on all DOHC engines, and bingo the sensor is there, 3 wires or 4, usually
most cam sensors are HALL sensors. (electronic, not mag 2 wire)

here it is, shown in every auto store in USA>
cant find this? just by looking at cam ends. (all 4)
25736583-lyiqq3m0sbedid5s2tz5fw1m-4-0.jpg suzuki dot com online suxs. (sensor has no drawing page)

but my guess top right front of VC? (valve cover)
i bet now you can tell me.... pick a corner, and find it?

25736583-lyiqq3m0sbedid5s2tz5fw1m-4-1.jpg

Jun 08, 2015 | 2007 Isuzu i-290 Extended Cab

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Eng starts hard,runs good until the rpm is over 2200 then it stumbles my input voltage on the cam sensor is 5volts ,on most cars i've read should have 8volts where


Both crank and cam sensors have a 8 volt reference I have found the wiring melted together where it cross over transmission shorting out the signal. also test your reference voltage at the computer with circuit unplugged at sensor watch meter and wiggle wiring going back to computer this will help find faulty area.

Nov 07, 2013 | 2005 Chrysler Sebring Conv

1 Answer

What would the reason for my rpm gauge to constantly flutter when idling or under load.Would that send wrong signal to the E.C.M.?


The rpm gauge would not be sending a signal to the ECM as it only reads the rpm's. The sensor that reads the rpms and from that information the ECM makes the necessary adjustments to the engine management. Have the fault codes read and look for a faulty cam/crank sensor.

Sep 11, 2013 | 1993 Chevrolet K1500

1 Answer

Giving the code E.27


E27 Open Throttle Switch Signal here is a list of all codes E12 No Distributor Reference Signal E13 Oxygen Sensor Not Ready E14 Shorted Coolant Sensor E15 Open Coolant Sensor E16 Generator Voltage Out of Range E19 Shorted Fuel Pump Circuit E20 Open Fuel Pump Circuit E21 Shorted Throttle Position Sensor E22 Open Throttle Position Sensor E23 EST Signal Problem E24 Speed Sensor Circuit Problem E26 Shorted Throttle Switch Circuit E27 Open Throttle Switch Signal E30 ISC RPM Out Of Range E31 Shorted MAP Sensor Signal E32 Open MAP Sensor Signal E34 MAP Sensor Signal Out Of Range E37 Shorted MAT Sensor Signal E38 Open MAT Sensor Signal E39 VCC Engagement Problem E40 Power Steering Pressure Switch Signal E41 Cam Sensor Signal Problem E44 Oxygen Sensor Signal Lean E45 Oxygen Sensor Signal Rich E47 BCM to PCM/ECM Data Problem E48 EGR System Problem E52 PCM/ECM Memory Reset E53 Distributor Signal Interrupt E55 Closed Throttle Angle Out of Range E58 Pass Key Control Problem E60 Cruise - Not In Drive E61 Cruise - Vent Solenoid Problem E62 Cruise - Vacuum Solenoid Problem E63 Cruise - Set Speed vs Vehicle Speed E64 Cruise - Acceleration Too High E65 Cruise - Servo Position Signal Problem E66 Cruise - Engine RPM Too High E67 Cruise - Switch Shorted E68 Cruise - Command Problem E70 Intermittent TPS E71 Intermittent MAP E73 Intermittent Coolant Sensor E74 Intermittent MAT Sensor Signal E75 Intermittent VSS Signal E80 Fuel System Rich E85 Idle Throttle Angle Too High E90 Cruise - VCC Brake Switch Signal Problem E91 Cruise - PRNDL Switch Problem E92 Heated Windshield Request Problem E96 Torque Converter Overstress E97 P/N To D/R Engagement Problem E98 P/N To D/R ISC Engaged Problem E99 Cruise - Servo Apply Problem

Jul 31, 2013 | 1992 Cadillac DeVille

1 Answer

Hi My car engine just died on highway. Check engine light came on. Diagnostic showed P0340 CAM sensor error. Got it replaced but error still there. Got Fuel filter and the sensor on the engine Oil cae(...


The cam sensor is supplied a reference voltage by the engine computer and the cam sensor should generate a signal back to the engine computer above 50 rpm of the engine cranking. The problem could be a faulty purchased cam sensor (yes this happens sometimes although rare) fwiring connector problem at cam sensor or faulty engine computer.

May 29, 2011 | 2004 Chrysler Sebring

2 Answers

How to set timing on 1998 gmc sierra


The v-8's timing is supposed to be 0 degrees plus or minus 2 degrees and is only adjustable if you have a scanner. A timing light does not work on them.
These engines can be "timed" in the way you are used too.
The distibutor housing holds the cam sensor, The PCM calculates the timing by measuring the crank signal and the cam signal.

What you are seting by turning the distibutor housing is the correlation between the 2 sensors. On the V-6 model, the housing holddown bracket is fixed to the housing so if you return the rotor to the proper position when reinstalling the housing, the engine should be at the correct cam sensor position setting.they did not fix the holddown bracket to the V-8 models, it would have saved a lot of headaches.
To set the correlation between the 2, you will need a scan tool that can read camshaft position offset. With the engine RPM over 1200 adjust the offset too 0 degrees.
TEST PROCEDURE
The ignition timing cannot be adjusted. The distributor may need adjusting to prevent crossfire. To insure proper alignment of the distributor, perform the following:

With the ignition OFF, install a scan tool to the DLC.
Start the engine and bring to normal operating temperature. IMPORTANT: Cam ****** Offset reading will not be accurate below 1000 RPM.
Increase engine speed to 1000 RPM.
Monitor the Cam ****** Offset.
If the Cam ****** indicates a value of 0°+/-2°, the distributor is properly adjusted.
If the Cam ****** does not indicate 0°+/-2°, the distributor must be adjusted.

ADJUSTING PROCEDURE
With the engine OFF, slightly loosen the distributor hold down bolt. IMPORTANT: Cam ****** Offset reading will not be accurate below 1000 RPM.
Start the engine and raise engine speed to 1000 RPM.
Using a scan tool monitor Cam ****** Offset.
Rotate the distributor as follows:
4.1. To compensate for a negative reading, rotate the distributor in the counterclockwise direction.
4.2. To compensate for a positive reading, rotate the distributor in the clockwise direction.

Repeat step 4 until 0°+/-2°, is obtained.
Turn the ignition OFF.
Tighten the distributor hold-down bolt to 3 Nm (25 lb. ft.).
Start the engine, raise engine speed to 1000 RPM and recheck Camshaft ****** Offset.

Thank you for using fixya and good luck.

May 09, 2010 | 1998 GMC Sierra

2 Answers

Replaced crank shaft position sensor from autozone. erased all codes. still showing code p1345. ive been told to use acdelco. am i doing something wrong?


Code p1345 is the crankshaft variation learn.You need to get the crankshaft variation learn done for the code to clear.You will need a scan tool.This should take care of the check engine light.Hope this helps.Good luck.

Mar 16, 2010 | 1996 Chevrolet C1500

2 Answers

Would a bad crank sensor cause car to loose power? I went over a speed bump and car just stopped


Actually, On 2006 vehicles the camshaft position sensor senses the TDC point of the number one cylinder, on its compression stroke. Its signal is relayed to the ECM to be used to determine the sequence of fuel injection. The Crank sensor is used to determine RPM ranges The crankshaft position sensor consists of a magnet and coil. The voltage signal from the sensor is relayed to the ECM to indicate engine rpm and the position of the crankshaft. This sensor wouldn't affect your performance but, the Cam sensor will if its damaged. To answer you question correctly, it would be the cam sensor i would check. it actually controls the injection system. if damaged, it will cause performance issues. On 2006 vehicles the crankshaft position sensor is located next to the radiator hose inlet and outlet assembly. On 2006 vehicles, the camshaft position sensor is located on top of the engine, on the engine head cover.

May 11, 2009 | 2006 Kia Optima

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