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Engine managment light on constant think its lumber sensor for omissions

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  • Cars & Trucks Master
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Have you used a scanner to confirm that is sure the Lambda sensor?
It is good if you can ,use the scanner and check for the fault code given by the vehicle ECU,

Posted on Jan 09, 2013

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Posted on Jan 02, 2017

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SOURCE: daewoo tacuma engine management light

There is sooo many problems with the 1.8ltr engine (2001) ..for example the oil ports in the cylinder head casting are way too small.. this causes clogging and obvious lack of flow and then lack of power due to compression ratio going out the window.. I've re-built quite a wee number of these puppies.. including my wife's own car..so I heartily recommend the below..
1/ THOROUGHLY FLUSH EVERY LAST BIT OF GRIME, DEBRIS, LACQUERS & OIL OUT OF ENTIRE ENGINE..
2/CHANGE FILTER & REFILL WITH SEMI-SYNTHETIC 15/40 OIL..
3/ OIL AND FILTERS MUST BE CHANGED EVERY 3,000 TO 6,000MILES TO MAINTAIN ENGINE (IF NOT BORING OIL PORTS AND QUITE SUBSTANTIAL WORK & EXPENSE)

This should give immediate effect, but you may also consider the CRANK/FLYWHEEL SENSOR.. It's NOTORIOUS.. Along with the IGNITION COIL PACK.. CONSTANTLY CRACKING HIGH TENSION LEADS..Etc...
Hope this helps someone out there..

Posted on Nov 07, 2008

  • 21 Answers

SOURCE: need to replace sensor for omission inspection on 2001 ranger truck-how to determine which one is bad

you need to get an OBD scanner plugged in . auto zone or advance auto or most other parts shops will read computer codes for ya.

Posted on Aug 05, 2012

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1 Answer

Engine light on. Hard shift. Rough idle. Constant revving.


Check engine (MIL) lamp illuminated ??
Scanned/codes retrieved ??

Feb 09, 2014 | 1995 GMC Sierra

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ENGINE MANAGEMENT LIGHT IS ON CONSTANT AND THERE IS A LOSS OF POWER WITH THE ENGINE SOUNDS LIKE IT IS MISFIRING


check your crankcase breather system may need cleaning and check for dirty air filter.and clean the throttle body at the butterfly with throttle cleaner.

Dec 18, 2013 | BMW Cars & Trucks

1 Answer

Need to replace sensor for omission inspection on 2001 ranger truck-how to determine which one is bad


you need to get an OBD scanner plugged in . auto zone or advance auto or most other parts shops will read computer codes for ya.

Aug 05, 2012 | Ford Ranger Cars & Trucks

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I have a 2004 Freestar and had the oil changed and it immediately started misfiring and knocking, come to find out they put the wrong oil in and have been doing so for 4 years! They are denying that is the...


The type of oil in the engine will not affect the check engine light. The engine light only comes on when something in the engine management system is out of specifications. Any sensor reading out of specification, e.g. oxygen sensor, mass air flow sensor, throttle position sensor etc., will trip the engine light. The only way I can think that the oil changers could be responsible is if they moved or damaged some wiring or a sensor etc. while doing the oil change.

Jul 01, 2011 | 2006 Ford Freestar

1 Answer

I'm just change the engine A4 1.8A 1997 to A6 2.0A 1998. The problem now the new engine cannot idle after ignition, only can stand for a few second. Some friend recommended to change the air flow sensor....


Hi Roza,
I think you'll have to replace more than the air flow sensor. I think you'll also have to replace the management system. I believe the engine you've used in fact doesn't use an air flow sensor, but instead uses a manifold absolute vacuum sensor which is incorporated into the management system (The engine management computer). The electronic system used for the one engine is not compatible with the other as far as I know....You may find you have to do a good amount of rewiring to the vehicle!
Regards Johngee10

Feb 05, 2011 | 1998 Audi A6

2 Answers

What is the purpose of the o2 sensor


For the most part it tells the onboard computer that the engine is getting the proper ratio of air. if it fails a check engine light will come on which your local emissions testing guy will fail you for. Its not an emergency fix it

Sep 15, 2010 | 2000 Jeep Grand Cherokee

1 Answer

Where is the cam sensor on a 2005 dodge neon sxt 2.0


Camshaft Position Sensor-On top of engine Operation The Engine Management System (EMS) uses the camshaft position sensor to manage sequential fuel injection and as part of misfire diagnosis. The EMS constantly monitors the number of pulses on the signal circuit. The EMS compares the number of camshaft sensor reference pulses and the number of crankshaft position sensor reference pulses received. If the EMS receives an incorrect number of pulses, Diagnostic Trouble Codes (DTCs) should be stored in the EMS. Some engine management systems will then default to multi-port or "gang-fire" injector operation. The camshaft position sensor signal is required to sequence the injector operation to the proper cylinder timing. If the camshaft position sensor or circuit is faulty, most engines will start. However, the EMS misfire diagnostic will likely be affected.
The following symptoms can be caused by an intermittent wiring connections or faulty signal to the EMS.
Related Symptoms
  • Extended crank time with a cold engine
  • Intermittent rough running
  • Unstable idle
  • Bucking
  • Hesitation
  • Stumble
  • Chuggle
  • Poor fuel economy
  • Stalling on acceleration
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Aug 05, 2010 | 2005 Dodge Neon

1 Answer

I have a 1996 saturn wagon. it failed on omissions for egr. ox sensor and catalyst. I had a new egr.. o2 sensor.. oxygen sesor before catalyst.. drove car on many different drive cycles and over 4-600...


You need to read the codes that your check engine light is showing. Go to Autozone or any place like that and they can read the codes for free. Throwing parts at a car doesn't fix it but finding the source of the problem and then repairing as necessary will allow for better results. Going off the check engine light being on can mean it is anything.

You have two O2 sensors on your car. One just after the head on the header. This is the O2 sensor that tells the PCM what the air/fuel is and the PCM can adjust accordingly. The one BEHIND the catalytic converter (or cat for short) does nothing but tell the PCM that the cat. is working properly. You may be changing the wrong O2 sensor. Also the EGR could be an electrical problem if that is the cause of the emissions failure.

So to review, find out the codes, post back with the codes and everything can go from there.

Feb 26, 2010 | 1996 Saturn SL

1 Answer

Exhaust omission warning light on


It means that the code you got was for an emissions problem. could be an O2 sensor or MAFF sensor.( Mass Air Flow ) Or even the catalytic converter. You should have posted the trouble code here.

Feb 16, 2009 | 2002 Ford Escape

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