Question about 2001 Oldsmobile Aurora

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Checked engine light comes on after driving cant get into the ecm no codes just error message

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  • argentarius2 Oct 20, 2008

    Check engine light on-replaced O2 sensor-ok for a couple weeks, then light on again-replaced O2 sensor again-ok for two weeks, now light on again.

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Try the mass air flow sensor.

Posted on Nov 04, 2008

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Posted on Jan 02, 2017

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What can cause the check engine light to be on?


Circuit Range Performance error.

When is the code detected? Malfunction is detected when an excessively low or high voltage from the sensor is sent to ECM. Possible symptoms Engine Light ON (or Service Engine Soon Warning Light) P0121 CHEVROLET Description The throttle position sensor (TPS) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM. Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.

Read more: https://www.autocodes.com/p0121_chevrolet.html


https://www.autocodes.com/p0121_chevrolet.html

chevrolet code was P0121 Google Search

Sep 04, 2017 | Chevrolet Cars & Trucks

2 Answers

Services in February warning message engine service required


The code was stored in the history part of the ECM. Don't ignore this. Usually when you can turn the key off and the light goes away. It is a transmission problem. Could be a simple transmission service. Could be more..

Aug 31, 2015 | 2009 Volvo V50

1 Answer

Check engine light has P0685 code. Engine stalled while driving. What are the possible causes of this? Is this an expensive fix?


- Faulty Engine Control Module (ECM) power relay
- ECM power relay harness is open or shorted
- ECM power relay circuit poor electrical connection
- Faulty (ECM)

Apr 24, 2015 | Cars & Trucks

1 Answer

My 1996 chevy blazer pulls back and forth while driving and my check engine light is on


Check engine light comes on and off, these are indication that there is some error code stored in your vehicles ECM. The engine module computer needs to be scanned. These will give the code and as per the error code the further problem can be detected and confirmed. The engine light indicator blinks or remains steady on dash when engine computer noticed any problem with any engine electrically operated components.


For more help, I suggest you to refer the help link provided below. These will let you know more about which areas to look, check, when there is engine light coming up on dash panel.

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Click the link below: -------


http://alltypesofpartsreplacing.blogspot.com/2012/12/check-engine-lightengine-warning-light.html


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These will help.

Thanks.


Feb 04, 2013 | Cars & Trucks

1 Answer

Had car scanned codes PO601 came up 1x code Po420 came up twice. sum say the ECM going out


code p 0601refers to engine control module (ECM)--memory check--sum error=== causes --ECM
code p 0420 refers to cat converter system bank 1--efficiency below threshold===causes cat converter --wiring --- heated oxygen sensor (HO2S) in exhaust manifold before cat converter
At this point get a known good ECM unit and substitute it for the old one as all indications are a problem ECM unit

Feb 07, 2018 | 2006 Chevrolet Cobalt

1 Answer

Check engine light is on again. After driving another 500 miles. the car was services and the found a leak on top of tank. They told me they replaced some cracked cap on top of gas tank. light was off for...


Must be cap is loose again or the cap was not fitted properly and so the check engine light is coming ON again.But if the light is ON again that means the ECM has stored error codes in it.The ECM means Electronic control module,also called cars computer.Get your car scanned at diagnostic scan center,.There you can get the exact error codes for the check engine light coming ON.At www.autozone.com its absolutely free to get car scanned.There you can get the codes for free.As per error codes you can replace the faulty part.-------------- This will help.Thanks.Helpmech.

Jan 20, 2011 | 2006 Porsche Cayman S

1 Answer

Car rpms goes up and down when driving or idling. It does it randomly can drive for a half day without it doing it then do it all the time


Does the Check Engine light come ON when this happens? Whenever the "Check Engine" light comes on, there is always a DTC (Diagnostic Trouble Code) stored in the ECM (Engine Control Module). You'll need an OBDII (On-Board-Diagnostics) scanner to retrieve any codes recorded/set in ECM. Once you do this and let us know what, if any codes are set, then we can go from there.

Jun 17, 2009 | 2001 Hyundai Elantra

1 Answer

Check engine light


Bad ecm (engine control module) or prom chip issue. Prom is located inside ecm QDM is quad driver module which is electronic portion of ecm. Would replace ecm first remebering that prom chip must be swapped from old box to new.

Mar 15, 2009 | 1994 Chevrolet Corsica

1 Answer

Engine light not coming on ! 2000 beetle


The engine light is only going to come on if the ECM detects a problem. The first time the light came on, a code was set. Now that the engine light isn't coming on isn't a bad thing. For what ever reason, the ECM is not detecting a problem so the engine light is not going to come on. Induce a code by unplugging the MAF sensor or MAP sensor and make the engine light come on. This will tell you that the ECM is in fact detecting problems and you engine light bulb isn't burnt out. When the engine light did come on, it could have been something that was intermittend and is not having a problem anymore.

Nov 04, 2008 | 2000 Volkswagen Beetle

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