Question about 2000 Volvo S80

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Emissions engine check light came on

Engine check light came on emissions but the car is running fine.

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  • Anonymous Mar 28, 2014

    car runs fine

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2 Answers

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  • Master
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That's because your emissions system wearing down or failing doesn't effect the car it just means your car is causing more pollution than normal

Posted on Nov 17, 2009

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  • Master
  • 460 Answers

Have the egr valve checked at a garage...

Posted on Nov 17, 2009

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Posted on Jan 02, 2017

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SOURCE: Check Engine Light Stays On

Go to a parts store, most will scan for engine codes stored in the cars computer for free. They can tell u what codes are present (write them down for future reference) what they mean, and what could be the problem. It is an indication that there is an emissions problem, and even though the car runs fine, ignoring the warning light could result in more problems and $ down the road if not corrected soon. When u get this free info, u can decide if u want to fix it yourself, go to a private mechanic/garage, or go to the dealer. It's always a good idea to go w/ knowledge of the problem and possible fix to avoid being taken advantage of. Good luck!

Posted on Nov 14, 2008

  • 13 Answers

SOURCE: service engine light on 2003 infinity g35

I had the same problem with my G35 05 after i forgot to close the cap, Usually the car will run for about 100 miles or so before the light goes away, but you can also, reset the ECU by checking this site http://www.6mt.net/forum/performance-mods/2833-easy-ecu-reset-procedures.html
Or what i did was pulling the fuses marked "Eng cont/inj, there is a 15A under the hood, in the fusebox near the battery, and a 10A in the driver-side interior fusebox - pull both. (As someone suggested in the same thread)it worked.

Posted on Mar 25, 2009

j_del
  • 1586 Answers

SOURCE: mechanic says camshaft sensor needs replace; however the car runs fine. Check engine light comes on sporatically.

Agreed with thundergod - I had a failed cam sensor on my Audi A4 that made no discernable difference in the car's operation, but changing it and resetting the light fixed the problem.

Posted on May 06, 2009

  • 25 Answers

SOURCE: The car ( 2003 Escalade)runs fine but check engine light came on.

Hooking a code reader onto the OBD II port will give you a code so that you can figure out what is wrong with it. It is most likely an emission code which won't hurt the performance but possibly the gas mileage

Posted on Dec 15, 2009

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Engine problem related to fuel refill


Evaporative emission
The Evaporative Emission Control System (EVAP) is used to prevent gasoline vapors from escaping into the atmosphere from the fuel tank and fuel system. The EVAP system usually requires no maintenance, but faults can turn on the Check Engine light and prevent a vehicle from passing an OBD II plug-in emissions test.
EVAP Evaporative Emission Control System - AA1Car.com Is the check engine light on ? Do you have problems with gas pump shutting off while pumping gas. When the pump shuts off the first time do stop fueling or top off the tank ? Overloading the charcoal canister > Stuck open purge valve .
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Auxilary emission control what and where is it? runs fine dash check engine light comes on


The information below was complied by me, it explains what causes the check engine light to come on and the process of finding the cause.

When the Check Engine light (or Service Engine Soon or small picture of an engine) is turned on, the systems computer control unit (called the PCM) has sensed a fault in the electronic controls of the engine and/or the emission system. When this happens you will seldom feel the car engine run any different. There are about 200 possible system faults (the gas cap is just one of them) that turn the Check Engine light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen/Oriley and Autozone parts stores (USA only) do this testing for free.

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Check engine light came on cars running fine.


If the check engine light comes on there is a problem some where in the emission control system, the vehicle may seem like its running ok but there is a problem within the system which will affect the emissions

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Check Engine lite comes on Code PO440


16824/P0440/001088 - EVAP Emission Control Sys: Malfunction Possible Symptoms
  • Malfunction Indicator Light (MIL) active
Possible Causes
  • Evaporative Emission (EVAP) System leaking
  • Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) faulty
  • Evaporative Emission (EVAP) Canister Purge Solenoid Valve (N115) faulty
Possible Solutions
  • Check Evaporative Emission (EVAP) System Sealing
  • Check Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80)
  • Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve (N115)

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Check engine light on; Gas milage went from 19 to 15, emission ba


YES!!, you had it tuned, it runs good, but gas mileage dropped, and check engine light is on,it sounds like the o2 sensors are slow or even dead, i would replace them for sure and that just might solve all your problems,good luck, hope this helps.

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Check engine light came at stop light. truck driving fine no problems


The check engine light is part of the vehicles emission system.This normally won't effect the running of the automobile , but it will fail emission inspection( if required in your state). It could be anything from faulty gas cap to bad spark plugs causing it to come on. Most auto parts chain ( i.e. Advance or Auto Zone) offer free diagnostics for the light , to find out why it is coming on.

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2003 c240 check engine light is on,car runs fine,500 miles past A service which is being done tomorrow,is it emission problem?,checked gas cap,seems tight,can u help?,thank you


HAVE CAR HOOK UP TO A DIAGNOSTIC SCANNER TO SEE WHAT CODE IS.MOST OF THE TIME IF CHECK ENGINE LIGHT COMES ON AND CAR STILL RUN FINE.YOU COULD HAVE EMISSION EVAPORATIVE LEAK.YOU COULD HAVE A SMALL MISFIRE.OR YOUR ALTERNATOR COULD BE OVERCHARGING OR UNDERCHARGING BATTERY.MANY THINGS WILL CAUSE CHECK ENGINE LIGHT TO COME ON.HAVE IT SCANNED.IT WILL SPOT THE PROBLEM FASTER.

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The car ( 2003 Escalade)runs fine but check engine light came on.


Hooking a code reader onto the OBD II port will give you a code so that you can figure out what is wrong with it. It is most likely an emission code which won't hurt the performance but possibly the gas mileage

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map sensor. check your spark plugs, wires, etc. maybe a loose wire plug. did u mention check engine light, i wonder can you tell me what diagnostic code came up. go to ur nearest auto parts if u dont have a scanner. and pull them codes out.

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