Question about 2002 GMC Envoy

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The engine was running, and I pulled the PCM fuse out. The car will not start. I have power to the radio and lights, but the service engine soon light and the reduce engine power light are on.

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Posted on Jan 02, 2017

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Technopro
  • 243 Answers

SOURCE: Service Engine Soon Light

The best way to know what is happening there is to drive a GMC dealer and get them to hook in the diagnostic tool and read the computer memory for present faults.
Cheers

Posted on Apr 19, 2009

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  • 634 Answers

SOURCE: Service engine light keeps coming on

need to scan for codes and find problem code some part stores do for free

Posted on Jul 06, 2009

  • 3 Answers

SOURCE: service engine soon and reduced engine power

disconnect batt. for 30 min. then reconnect,if no problem exist the lights will go away

Posted on Dec 20, 2009

  • 205 Answers

SOURCE: SERVICE AIR BAG LIGHT STAYS ON AND REDUCED ENGINE

It will be more help full if you can provide the trouble codes.

Posted on Nov 12, 2010

nighttrain_r
  • 444 Answers

SOURCE: I have a 2003 Envoy- GMC. Why does the reduce engine speed light come on

you need to scan you vehicles ECM, there is a trouble code stored there. depending on where you live most parts stores( such as a shucks/orielleys) will have a scan tool they will let you use if the vehicle is in thier parking lot. this should diagnose the issue, provided the battery hasnt been disconnected since then.

Posted on Mar 13, 2012

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2 Answers

Not sure why the check engine port has no power,looking for a blown fuse


On GM it's part of the cigarette lighter circuit, check that fuse.
If not just get a test light, ground it to a good ground, turn the key to the on position, then use the test light to touch both exposed terminals on each fuse, test light should light on both sides of each fuse, if it only lights on one side, then that fuse is blown. This saves the trouble of pulling each fuse out to inspect it. Good luck.

Mar 02, 2015 | 1996 Ford Windstar

1 Answer

Service vehicle soon like comes on after 25 minutes of running then it locks out my radio and causes the security light to also come on. I've had it on 3 different scopes & was told the codes were


I don't know who told you that , a semi- clogged catalytic will cause a low power issue an maybe a couple of DTC'S diagnostic trouble codes P0420 - P0430 ,Has nothing to do with the alarm system ! Do you mean Service vehicle soon or SERVICE ENGINE SOON ?
SERVICE VEHICLE SOON
The IPC illuminates the SERVICE VEHICLE SOON indicator in the message center when the PCM or the BCM detects certain non-emissions related malfunctions. The IPC receives a class 2 message from the PCM or from the BCM requesting illumination. What problem are you having with alarm system ? If you have a starting issue it's the Anti-Theft system not alarm system . The alarm would go off if you vehicle was broke into . I don't know what shop you took it to but did you try a dealer ?

How to Diagnose Codes P0420 P0430

Feb 04, 2015 | 2002 Buick Rendezvous

2 Answers

The service engine soon light will not come for pretest before starting engine. It is an automatic fail for emissions test. 2002 gmc sierra.


This could be something as simple as the Service Engine Soon light bulb being burned out. Removing the instrument cluster isn't too terribly difficult, but if you can carefully pull it out of the dash, look behind where the bulbs are located and see if that one happens to be burned out.
I hope this helps! :)

Jun 11, 2014 | Cars & Trucks

1 Answer

Reset check engine light


we get it serviced,? or better, SCAN it>? !!!!
but all cars with EFI, from ~1988 to now, (about) the PCM
is reset , by 3 ways,
1: scan tool reset. push the button, bingo.
2: pull the PCM memory fuse for 5min (now called, IOD )
3: pull battery NEG lug, and this bricks Radio, NAV and all things with learn mode, just forgot and the "entanglements there of"


posted like 1000 times here, so 1001.
if repair, PCM,s so this is my bag (jones), (retried)


easy as 1,2,3,
#2 is free, not a dime of cost. or risk of done correct.
if only PCM IOD is pulled. mine has 6 OIDs, the PCM is the correct one.

Oct 20, 2013 | 2008 Jeep Patriot

1 Answer

Scan tool will not connect to PCM, car has no spark, engine rolls over but wont start


Does your 'service engine soon' (sometimes a check engine) light stay on if you turn the key to 'run' but don't start it? If this light comes on then the computer is getting power. The no spark could be caused by a bad cam or crank sensor. Since the computer on Dodge vehicles uses both sensors for spark, you can't really tell which one is the issue unless you can connect a scan tool. The scan tool is powered by the port you plug it into, which gets its' power from the cigarette lighter fuse.

Jun 21, 2011 | 1997 Dodge Avenger

1 Answer

I need to know wher the fuse to the windows are located


That's two different problems check engine is for engine codes in pcm. The other ?SVS service vehicle soon body control modul if all lights work checks bulbs are they correct other then that you need & scan tool to pull codes for diag If I read complaint correct GOOD LUCK

Aug 31, 2009 | 2001 Pontiac Aztek

1 Answer

1991 plymoth voyage comes uyp with code 12 and 21


If the engine is running fine and you disconnected the battery recently then don't worry about it. To clear the check engine light and the code�s you can do one of two thing�s. One pull the negative battery post off the battery for 30 second�s. This clears the computer codes and the light. However it also clears your radio presets and clock. Another way is to pull the fuse labeled �Fuel Pump�. This fuse is in a box under the hood behind the battery (See photo to the left), Should be the only yellow 20AMP fuse in there. This fuse also disconnects power to the PCM "computer" as well � Kind of a secret to the general public� Just leave this fuse out for 30seconds or so. Then replace. This will keep your clock and radio presets. The engine might be a little hard to start or die the first time since the computer has to relearn everything again

Jul 27, 2009 | 1991 Plymouth Grand Voyager

3 Answers

Service Engine Soon Light on a 2004 Trail Blazer


VERY SIMPLE
1. Turn key to the "on" position but don't start car
2. Pull the PCM BAT and PCM IGN fuses in engine compartment
3. Wait approximately 5 minutes
4. Turn ignition off
5. Replace fuses
6. Start the car and the make sure the light has went off.
then check to see if your gas cap is on right. If this light comes on again then it is time for the dealer. If you can't find them fuses then just disconnect the battery for five minutes reconnect the battery and when you start the truck the light should be out. just let it idle for 2 minutes with no heater or radio on. and you set. I hope this helps you.

Dec 04, 2008 | 2004 Chevrolet TrailBlazer

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