SPONSORED LINKS

2002 GMC Jimmy engine light comes on and off

Tiny
JACKIE68
  • MEMBER
  • 25 POSTS
Thanks for the info
I will pass this on to Jess and my husband cause you lost me after the first sentence : ))
Jackie
Was this
answer
helpful?
Yes
No
Friday, March 13th, 2009 AT 6:49 PM
Tiny
JACKIE68
  • MEMBER
  • 25 POSTS
Hi Dave, Thanks so much but we are still in the dark with the engine warning light on. My husband is reviewing your info right now. Yesterday he bought a new distributor(the whole unit) They don't rebuild them so he bought a new one. It came with a new cap and wires. He installed it and it is still misfiring. Seems only after the first start up. At first start up she(the truck) runs normal, no engine light comes on and it runs great. If a second or subsequent start up for the day is attempted then the engine light comes on and the truck runs horrible. We have also bought a CanOBD2 diqgnostic tool. Here is what it reads

P0300 Multiple Cylinder Misfire Detected

Stored Codes
P0405 EGR Position Sensor Circuit Low Input
P0418 Secondary Air Injection System Relay A Control Circuit

Pending Codes

P0300 Multiple Cylinder Misfire Detected
P0141 HO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction
P0155 HO2S-21 (Bank 2 Sensor 1) Heater Circuit Malfunction
P0135 HO2S-11 (Bank 1 Sensor 1) Heater Circuit Malfunction
P0405 EGR Position Sensor Circuit Low Input
P0418 Secondary Air Injection System Relay A Control Circuit

Diagnostic Information

Parameter Description Value
DTC for which Freeze Frame was Stored P0300
Fuel System 1 Status Closed Loop - fault with at least one oxygen sensor
Fuel System 2 Status Closed Loop
Calculated LOAD Value 3.53 %
Engine Coolant Temp 183.20 °F
Short Term Fuel Trim - Bank 1 -7.81 %
Long Term Fuel Trim - Bank 1 -2.34 %
Short Term Fuel Trim - Bank 2 -7.03 %
Long Term Fuel Trim - Bank 2 -3.13 %
Intake Manifold Absolute Pressure 13.03 inHg
Engine RPM 618.50 rpm
Vehicle Speed Sensor 0.00 mph
Air Flow Rate Mass Air Flow Sensor 0.87 lb/min
Absolute Throttle Position 1.96 %
Click here to view Monitor Status

Monitor Name Monitor Icon Status
MIL ON
Misfire Monitoring
Complete
Fuel System Monitoring
Complete
Comprehensive Component Monitoring
Complete
Catalyst Monitoring
Not Complete
Heated Catalyst Monitoring
Not Supported
Evaporative System Monitoring
Not Complete
Secondary Air System Monitoring
Not Complete
A/C System Refrigerant Monitoring
Not Supported
Oxygen Sensor Monitoring
Not Complete
Oxygen Sensor Heater Monitoring
Not Complete
EGR System Monitoring
Complete

I am not sure if this will help you or not but thought it might.
Once again thanks for helping
Sorry for taking up your time
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 12:14 PM
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
Hey Jess.

You are not taking up my time .. this is what we are here for ..no need to be sorry ..

OK I really need you to clean the CKP .. if this is dirty or bad it will cause multi misfires ? it should set it's own code but not alway's ?? let me know and i will review your data in the meantime


https://www.2carpros.com/forum/automotive_pictures/266999_smiley4_14.png

Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 12:35 PM
Tiny
JACKIE68
  • MEMBER
  • 25 POSTS
My husband has went outside to clean the CKP sensor
thanks
Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 12:58 PM
Tiny
JACKIE68
  • MEMBER
  • 25 POSTS
My husband can't find the CKP sensor. Can you send a link to a pic of where it is or maybe describe where it is or located near?
Thanks
Jackie
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 2:09 PM
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
Sorry I had to pop out ..it is just near/behind the crankshaft pulley that has the alternator belt on etc. CKP sensor is located in the front engine cover.

Crankshaft Position (CKP) Sensor (4.3L VIN W).....On front of engine, near crankshaft pulley.


https://www.2carpros.com/forum/automotive_pictures/266999_ckp_6.jpg




https://www.2carpros.com/forum/automotive_pictures/266999_AAA2_254.png

Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 4:30 PM
Tiny
JACKIE68
  • MEMBER
  • 25 POSTS
My husband found it a couple of hours ago, I have been having computer problems so couldn't check email until now.
He cleaned the sensor(was very dirty, coated with oil and debris) When truck was restarted the engine light blinked for about 5 seconds then stayed on.
Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 6:56 PM
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
OK ..but is it running bad still ?? or better .. or exactly the same as before (misfiring) coughing chugging etc. ?? the light could be on because we have'nt cleared the codes !!!


https://www.2carpros.com/forum/automotive_pictures/266999_AAA2_255.png

Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 7:00 PM
Tiny
JACKIE68
  • MEMBER
  • 25 POSTS
It is still running the same
Idling went from 750 to 600 to 550 while in park
Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 7:03 PM
Tiny
JACKIE68
  • MEMBER
  • 25 POSTS
My husband said right about clearing the codes
He has had the battery disconnected for about 3 hours now
Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 7:05 PM
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
OK .. I need you to delete the fault codes with your scanner and restart the vehicle .. once running if it runs ok ..let it tick over for a minute or so .. rev it up a couple of times .. then turn it off and restart again and let me know how it runs once refired up and what codes return ??

Thanks


https://www.2carpros.com/forum/automotive_pictures/266999_AAA2_256.png

Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 7:13 PM
Tiny
JACKIE68
  • MEMBER
  • 25 POSTS
Ok, husband is going out to do that right now.
Thanks
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 7:18 PM
Tiny
JACKIE68
  • MEMBER
  • 25 POSTS
My husband reconnected the battery, cleared the codes, started it, ran good for a minute then it started to run bad again. Then shut it off again waited a minute or two then restarted it. Engine light was not on the first time but was back on the second time.
He has the new diagnostic codes and I have to hook the tool to the computer and copy those for you.
Give me a couple of minutes
Thanks
Jackie
Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 7:42 PM
Tiny
JACKIE68
  • MEMBER
  • 25 POSTS
This is what the diagnostic tool is now saying
Do you think we should run it longer?

DTC Information
Stored Codes
P0405 EGR Position Sensor Circuit Low Input

Pending Codes
P0405 EGR Position Sensor Circuit Low Input

P0418 Secondary Air Injection System Relay A Control Circuit

Diagnostic Information
Freeze Frame Information
Parameter Description Value
DTC for which Freeze Frame was Stored P0405
Fuel System 1 Status Open Loop
Fuel System 2 Status Open Loop
Calculated LOAD Value 6.27 %
Engine Coolant Temp 132.80 °F
Short Term Fuel Trim - Bank 1 0.00 %
Long Term Fuel Trim - Bank 1 -1.56 %
Short Term Fuel Trim - Bank 2 0.00 %
Long Term Fuel Trim - Bank 2 -1.56 %
Intake Manifold Absolute Pressure 13.32 inHg
Engine RPM 882.75 rpm
Vehicle Speed Sensor 0.00 mph
Air Flow Rate Mass Air Flow Sensor 1.40 lb/min
Absolute Throttle Position 0.00 %
Monitor Information
Monitor Name Monitor Icon Status
MIL ON
Misfire Monitoring
Complete
Fuel System Monitoring
Complete
Comprehensive Component Monitoring
Complete
Catalyst Monitoring
Not complete
Heated Catalyst Monitoring
Not Supported
Evaporative System Monitoring
Not complete
Secondary Air System Monitoring
Not complete
A/C System Refrigerant Monitoring
Not Supported
Oxygen Sensor Monitoring
Not complete
Oxygen Sensor Heater Monitoring
Not complete
EGR System Monitoring
Complete
Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 7:56 PM
Tiny
JACKIE68
  • MEMBER
  • 25 POSTS
My husband thinks that it is going to read a misfire again if left to run longer.
He thinks the hoses need to be checked cause he thinks there is a leak going to the EGR
What are your thoughts
He thinks once the EGR is fixed the other things will fall in line.
Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 8:01 PM
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
OK .. now diconnect the battery for 5 minutes.. at least ...reconnect battery ... this should delete ALL codes and KAM (keep alive memory) so have your radio code handy !.. check with scanner before restarting .... start her up and let her sit idleing for 5 mins minutes .. stop her .. restart her and let her sit for 5 minutes again .. if you think she will drive OK run her around for 5 minutes the second time and see how she behaves

the results I need are :-

1) how did she run for the first 5 mins ..ie. good for 3mins bad for 2 .. etc. idleing up and down ?

2) how did she run for the 2nd 5 mins good/bad idleing up and down just chugging away etc.

3) what are the new codes ..

Thanks


https://www.2carpros.com/forum/automotive_pictures/266999_AAA2_258.png

Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 8:09 PM
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
He sounds good to me .. check the hose .. I think we may have cleared up the misfire mystery .. although the egr will eventually cause a misfire as well ..


https://www.2carpros.com/forum/automotive_pictures/266999_AAA2_259.png

Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 8:24 PM
Tiny
JACKIE68
  • MEMBER
  • 25 POSTS
He is going out right now to do what you mentioned
I am not sure what time it is for you or where you are located but it is 9:35pm here, he is working in the cold and dark but we will see what happens here now and let you know.
We will then continue in the morning if this doesn't work.
Thanks very much for helping and I am sure we will find the problem some time, we better, or I guess you may see it listed on ebay.
The heading would be:
Real tool of a vehicle for sale!
Ha! Ha!
Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 8:39 PM
Tiny
JACKIE68
  • MEMBER
  • 25 POSTS
First start up, minute one, engine running smooth, rpm 900
minute two, engine starts to develop shake, rpm 750
minute three, engine developing more shake, engine knocking, smell of gasoline in exhaust, rpm 550
and it just gets worse after that.
He is going to go back out to restart and run it for a second time
Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 8:44 PM
Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
Ha ..Ha.. I wiil be watcing out for it ! ... NO ..we will get to the bottom of this ... can i first say that just because the fault code shows a bad EGR doesn't mean that the EGR is BAD .. all sensors are related to each other.. cousin's in a way.. lol ... so it still could be something else is throwing the EGR through a loop ..check the pipe .. and also wiggle the wires to see if this makes any difference .. also did we ever clean the MAF sensor ? .. this could show up as a fault on the EGR system ... it is also 9-45pm here now .. but i am inside ..lol .. I will be here around 11 am in the morning .. so we can cary on then with more daylight ..

let me know


https://www.2carpros.com/forum/automotive_pictures/266999_smiley1_2.png

Was this
answer
helpful?
Yes
No
Sunday, March 15th, 2009 AT 8:50 PM

Please login or register to post a reply.

Related Check Engine Light Content

Is it Safe to Drive Check Engine Light?
VIDEO
Is it Safe to Drive Check Engine Light?
Instructional repair video
Check Engine Light
GUIDE
Check Engine Light
Why is my check engine or service engine soon turned on? In this guide we talk about what this is associated with this notorious light, what it is used for and what you...
VIEW MORE

Sponsored links