Question about 2001 Oldsmobile Aurora

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P0385 Crankshaft Position Sensor

Just got a new Mass Air Flow because the code was coming up and because I was told that was why my car was stalling, but its still stalling when i'm stopped. Could it be because of the crankshaft sensor? Also, can this be fixed by an inexperienced mechanic (me)?? Any suggestions would be greatly appreciated!

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I have an 01 3.5 and had the same problem. I also bought a MAF . It still stalled. I gave the car a Z-Max treatment and I also took the air inlet hose off the throttle body. Used several rags with some alcohol to clean the inside of throttle body, the best I could w/o taking it off . Re-assembled and all seem to be well. The real culprit, I believe, is the AIC . It sticks closed at times. This is the upper control selenoid on the throttle body. I have done this procedure a couple of times, It is simple and you will be amazed how dirty it is inside.

Posted on Jul 27, 2008


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DTC P1309 - Misfire Monitor Disabled

Several possible causes there, check ans test...
- CMP (Camshaft Position) sensor connector is damaged (check pins for damage, and for moisture)
- CMP (Camshaft Position) sensor has failed
- CKP (Crankshaft Position), ECT (Engine Coolant Temperature) or MAF (Mass Air Flow) sensor may be out-of-calibration
- CKP (Crankshaft Position), ECT (Engine Coolant Temperature) or MAF (Mass Air Flow) sensor may have failed
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Hope this helps; also 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.

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Have you had it to a shop that has a professional type scan tool that can view engine sensor data parameters ? Do you know what those are ? Idle air control counts , mass air flow sensor data , MAP sensor , TPS - throttle position sensor , crankshaft position sensors , Cam sensors , engine coolant temp , intake air temp etc......

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P0101: MAF or VAF A Circuit Range/Perf

- Dirty mass air flow sensor
- Dirty mass air filter
- Mass air flow sensor harness is open or shorted
- Mass air flow sensor electrical circuit poor connection
- Intake air leaks
- Faulty mass air flow sensor

Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.

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I was driving on the local streets and my car began to sputter and it would not speed up and it would stall,if i turn it off and started again, it still not speed up, some times it does not start up, if i...

I'm assumieng that you are talking about 2000 Nissan Altima... Are you check any OBD fault code there?

To me, sound like that either the fuel lines are cloged up and need to be replaced or cleaned out. Or it's your fuel filter that is dirty and needs to be replaced. I am almost certain that it's one of those things. I would first RE-CHECK the fuel filter and replace it before you replace the fuel lines as they would probably be more money to fix.

Few time ago, I heard about Nissan had a problem with their MAF (Mass Air Flow sensor), if when it is acting uo, disconnect the sensor, if run OK, then replace it.

The other possibility (that you comment us) is the Crankshaft Position sensor (CKP); this devices measures crankshaft location and relays this information to the PCM (Powertrain Control Module). Depending on the vehicle, the PCM uses this crankshaft position information to time the spark properly or on some systems it is only for misfire detection and does not control spark timing. The CKP sensor is stationary and works in harmony with a reluctor ring (or toothed ring) that is attached to the crankshaft. As this reluctor ring passes in front of the CKP sensor, the magnetic field created by the CKP sensor is interrupted and this creates a square wave voltage signal that the PCM interprets as crankshaft position. If the PCM detects that there are no crankshaft pulses or if it sees a problem with the pulses on the output circuit, P0335 will set, this is the reason because I suggtes scanned the PCM, to confirm this fault code stored there.

A P0335 "check engine light" code could be caused by:
* Damaged CKP sensor connector
* Damaged reluctor ring (missing teeth or not turning due to sheared-off keyway)
* Sensor output open
* Sensor output shorted to ground
* Sensor output shorted to voltage
* Failed crank sensor
* Broken timing belt
* Failed PCM

Note this possible solutions, if this wrong is present in your vehicle:
1. Using a scan tool, check if, when engine is running or cranking, that there is an RPM signal.
2. If there is no RPM reading, then visually inspect the crank sensor and connector for any damage and repair as necessary. If there is no visible damage, and you have access to a scope, you could check the CKP 5 Volt square wave pattern. If you do not, then, obtain a resistance reading of your crank sensor from a repair manual. (There are so many different types of crank sensors that there's no way to put here which resistance reading is correct). Then check the resistance of the CKP sensor by disconnecting the sensor and measuring resistance of the sensor. (It is best to check resistance readings from the PCM connector. This rules out any wiring problems from the start. But it does require some mechanical skill and shouldn't be performed if you\'re not familiar with automobile electrical systems). Is the sensor within resistance specs?
3. If not, replace the CKP sensor. If so, recheck resistance reading from the PCM connector. Is the reading still okay?
4. If not, repair open or short in the wiring to the crank sensor and re-check. If the reading is okay, the problem is intermittent or the PCM may be at fault. Try reconnecting and checking for RPM signal again. If there is now an RPM signal, wiggle test the wiring harness to try and induce the fault.

This code is basically identical to P0385. This code P0335 refers to Crankshaft Posistion Sensor "A", whereas P0385 refers to Crankshaft Position Sensor "B". Other crank sensor codes include P0016, P0017, P0018, P0019, P0335, P0336, P0337, P0338, P0339, P0385, P0386, P0387, P0388, and P0389.

Good luck and keep us updated.

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