Question about GMC Yukon XL

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I HAVE A 2002 DENALI THAT I JUST PURCHASED. IT HAS 253000 MILES ON IT. I HAVE DROVE IT FOR 3 DAYS AND NOW MY SERVICE ENGINE SOON LIGHT IS ON. CAN YOU TELL ME WHAT PROBLEMS IT COULD BE?

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  • Expert
  • 166 Answers

Time for oil change? Loose gas cap? Auto zone and several other parts stores will hook a reader to the plug under the steering column and read the code. Best news is they do it for free.

Posted on Feb 14, 2014

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

fastboyz
  • 674 Answers

SOURCE: Service Engine Soon light, but no trouble codes

what are you using to download your codes

Posted on Sep 10, 2008

  • 1861 Answers

SOURCE: Check engine and VSC lights on

I talked to you on the live chat, and I think that you may have missed the end of my typing...

What I went on to say is that more often than not, on the 02 4Runners, the Check and VSC lights in tandem look mainly after the emission system, and, since you stated no issues during the road test, I would guess that it is a fuel issue (too full/loose gas cap). But, if you can get the vehicle scanned, I will be very glad to provide you with more and better info if you provide me with the DTC codes. That would require your guy or an autozone hookup to a scan tool. I hope my clarification helps; and the graciouness of a FIxYa rating for this question would be greatly appreciated

Posted on Nov 06, 2008

emissionwiz
  • 75797 Answers

SOURCE: Engine warning light and engine vibration 2002 VW Passat

The flashing is telling you that the engine is mis-firing, the dealer will run a test to determine the cylinder that is mis-firing, chances are it is something simple

Posted on Dec 01, 2008

  • 14 Answers

SOURCE: P0421 code on recently purchased(from dealer) 2002 RS

Hi,

So you have a P0421.

A code P0421 may mean that one or more of the following has happened:

  • The catalytic converter is no longer functioning properly
  • An oxygen sensor is not reading (functioning) properly
  • A sparkplug is fouled up

As far as running conditions if it performs normally, you most likely need a catalytic converter. The good part of this is there shouldn't be any abnormal running conditions, so it should be fine unless the engine is running very rich for some reason. (it will usually smell badly when this happens) However, on rare occasions the cat can get hot and melt down causing an exhaust restriction..bad gas mileage, low power, and possible fire potential, but most likely this is not the case. (this is generally speaking here and covering all the bases... )

The most common thing with P0421 that the fuel injection computer detects that the cat is not performing to federal specs an need to be replaced. You will need to have it fixed before your vehicle inspection.
Good luck and I hoped this helped you.

Posted on Dec 27, 2008

  • 1 Answer

SOURCE: Service Engine Soon light on 2002 BMW X5

go back & sleep with the mechanic, that always works for my sister.

Posted on Jan 02, 2009

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I JUST PURCHASED A 2002 YUKON THAT HAS 253000 MILES ON IT. I HAD IT FOR 3 DAYS AND TODAY WHEN I STARTED IT THE "ENGINE SERVICE LIGHT SOON" CAME ON. CAN YOU TELL ME WHAT IT COULD BE?


Not without you having the engine computer checked for trouble codes. Most auto parts stores will scan the computer for free in hopes of selling you some parts. The codes are a guide as to what to test.

Feb 14, 2014 | GMC Yukon XL Cars & Trucks

1 Answer

Engine Service Soon Light On code P0154


Error Code: P0154
Description:
Heated Oxygen Sensor (HO2S) 1 , Bank 2 - No Activity Detected
Problem areas:
- Wiring.
- Open circuit in signal wire, between Heated Oxygen sensor 1, Bank 2 and ECM. (Must check and confirm)
- Heated oxygen sensor (HO2S).
- Engine control module (ECM).

Nov 20, 2013 | 2003 Mitsubishi Montero Sport

1 Answer

I have a 2004 Yukon denali and while driving, I got check gas cap alarm. 2 miles later check engine light is on. Checked gas cap, cleaned gasket and tightened. Drove for 2 days. Reset fault and drove 160...


Hello, have you tried to unhook the negative side of the battery for about 10 minutes and then go from there . It should reset the computer completely .

Sep 14, 2011 | 2003 GMC Yukon Denali

2 Answers

Service engine soon light comes but usually goes out soon my wife drove it the other day and it stayed on for 8 miles or until she turned off the car then started it 10 minutes later and no light my...


yes the check engine light has to be on for a while. so they can get the problem codes with an OBD-II scanner to find what area the problem is in.

May 22, 2011 | 2002 Oldsmobile Intrigue

1 Answer

Service engine soon light on drove to work 15 miles away drove back home went to gas station turned my vehicle off and when I came back out started it the service engine soon light came on and is still on...


That light indicates a malfunction if the computerized engine management system (fuel injection, spark, cooling system). There are literaly dozens of things that can cause the light to come on. You will need to take it somewhere and get the code that caused the light to come on. Then we can help you find the problem. Some of the auto parts chains (AutoZone, O'Reilly's, Advance, etc.) will get the code for you at no charge. Then repost your problem and include the trouble code.

Feb 24, 2010 | 2002 Buick Rendezvous

1 Answer

Service Engine Soon Light Came On


mostly your thermostat . how is your engine heat ?

Jun 05, 2009 | 1998 Saturn SL

1 Answer

I have a 2002 Saturn SL. First off I would like to


oxygen sensors will cause intermittant check engine light and minor running conditions as you described and will absolutly effect your fuel milege

Mar 03, 2009 | 2002 Saturn Sl

2 Answers

Check engine and VSC lights on


I talked to you on the live chat, and I think that you may have missed the end of my typing...

What I went on to say is that more often than not, on the 02 4Runners, the Check and VSC lights in tandem look mainly after the emission system, and, since you stated no issues during the road test, I would guess that it is a fuel issue (too full/loose gas cap). But, if you can get the vehicle scanned, I will be very glad to provide you with more and better info if you provide me with the DTC codes. That would require your guy or an autozone hookup to a scan tool. I hope my clarification helps; and the graciouness of a FIxYa rating for this question would be greatly appreciated

Nov 06, 2008 | 2002 Toyota 4Runner

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