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Thread: 01 Tahoe Trouble Codes
05-23-2007, 10:48 PM #1
- Join Date
- Dec 2006
01 Tahoe Trouble Codes
My 01 Tahoe is showing a "Check Engine" light.
I remember on some other GM stuff, you could put a paperclip across two pins in the under-the dash receptical and count the blinks. One long one was a 10 and short ones were ones.
Is this still the case and where would this receptical be located in the Tahoe? and just how do you go about it?
Thanks a million for all the past help.If it has four wheels and a steering wheel...you'll have to work on it.
05-23-2007, 11:02 PM #2
I've never been a huge fan of doing that. Have you asked a local shop like Napa or whatever to take a reading? IMO I would just get it read right so theres no mistake. More accurate anyway.
Then post back so we can help. Is there something obvious wrong so far?
2007 Ford E250(Work van) (Ya, Ya, shut up!)
1996 GMC Sierra SLE 1500 5.7L/4L60E
05-23-2007, 11:17 PM #3
- Join Date
- Dec 2006
Nothing appears to be going wrong at this point, however, I thought I might have got a smell of rotten gas exhust but not sure it was coming from my Ho.
05-23-2007, 11:21 PM #4
Rotten egg smell is usually catalitic converter problem. If its choking motor it might throw an SES
05-23-2007, 11:59 PM #5
Jumpering pins to get the CEL to flash out trouble codes is the old OBD-1 method. 1996 and up are OBD-2. You have to have an OBD2 scanner/code reader to get codes on your Tahoe. Some parts stores will pull trouble codes for free in the hopes of selling something. I even think Autozone includes a coder reader in their loan a tool thing.
If you want to DIY, I've seen OBD-2 code readers for as little as $50 on up to whatever you want to pay.
When pulling codes, remember that a trouble code by itself does not constitute a thorough diagnosis. A trouble code tells you where to begin the diagnosis.'98 K1500 Suburban LS 5.7 L 4L60E NV246 ARB
'92 Ford Explorer XLT 4x4 4.0 L A4LD BW13-54 Trac-loc rear
"My toys were the greasy cogs and springs and pistons that lay around all over the place, and these, I can promise you, were far more fun to play with than most of the plastic rubbish children are given nowadays." Danny in Roald Dahl's Danny The Champion of the World
05-26-2007, 11:16 AM #6
Smells like trouble
Rotten egg smell is being caused by raw fuel burning in the catalytic converter. A little odor at startup or at idle is OK, but otherwise not good for the converter and usually sign of trouble upstream of the cat.
One thing temperature measurements will tell you, however, is if the converter is working too hard. An infrared noncontact pyrometer or a temperature probe will tell you if the converter is running unusually or dangerously hot. If the converter outlet temperature is 200 or more degrees higher then the inlet temperature, it means the engine is running rich and there's a lot of CO in the exhaust that needs to be burned. A rich fuel mixture will often produce a "rotten egg" odor in the exhaust (the smell is hydrogen sulfide). Underlying problems may include an engine management system that is not going into closed loop (check the coolant and oxygen sensors, or for a thermostat stick in the open position), plugged PCV valve, or excessive fuel pressure (bad fuel regulator). High CO levels in the exhaust can also be caused by an inoperative air pump system.There is no way to happiness....happiness is the way.:yipi:
High Desert SoCal
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02 Honda Civic LX
Looking for a 1990's Miata for an engine swap
05-26-2007, 05:23 PM #7
06-03-2007, 05:18 PM #8
- Join Date
- Jun 2007
How about the software for laptops? Anyone here use it? I know its out there somewhere. Im sure most are more than i want to pay though.....but i know theres gotta be someone on here that uses it2000 Tahoe
06-03-2007, 08:40 PM #9
Then a program to read the codes. Not sure what the guys have been using for the program, I can try and find the thread if you are really interested.
Technology is great, when it Works,
And one Big Pain in the Ass When it Doesn’t.
Detroit Iron Rules, All the Rest are Just Toys.
94 GMC Burban, 5.7L (350), 4X4, Auto
86 GMC Burban, 350, 2 WD, Auto
79 GMC pickup plow truck, 400, Full time 4X4, Auto
86 Pontiac Fiero SE, 2.8L, Auto, only mid engine American car
See a Pattern yet?
15 year GM assembly line worker.
06-03-2008, 01:19 AM #10
Check out CarChip from DAVIS Instruments in California. Adapter, software and cables included.
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