How can I clear the engine service light

[ewill3rd]

See your PM I sent.
I think they need to replace the throttle body for you.
Let me know how it turns out.

[cguthrie]

Guys,

I just go the P1101 code again, after the temp dropped again. I've only had this car for @12K, and I believe it had a fresh air filter when I purchased it.

I'm reading that the p1101 refers to the actual measured airflow from MAF MAP EGR &TP is not within range of calculated airflow. Now, the car runs perfectly, and I don't know if I really have an issue or if the computer is just throwing off BS info. I do not have time to take a well running car into the dealer, and would be frankly a bit scared that they might switch something out and I could be in a worse position! (excluding our Alexandria dealership friends, of course)

Any updates on this? I don't believe I can harm anything driving with this, or am I wrong? Since my other vehicle is a POS, I have a code reader and can clear these easily, but would like to solve the problem, if there is a problem.

I miss the ability to read codes through the heater buttons on my old Caddie 99STS, but the graphic of the engine is at least entertaining. When will we get a code and associated faults on the display?

Ironically, I had a cone K&N on my last n* for over 110K, without MAF codes thrown or drivability issues. Now I'm trying to behave, and I get the engine service light!

Many thanks,

CG
2005 STS 1SG 36K

[mike sts]

If the check engine light is on you cannot use your remote start, when mine was hooked up tp a computer it was running just a bit lean which could effect emissions and horepower but maybe not noticible

[ewill3rd]

True, if the MIL comes on the remote start will not work.

The P1101 is usually accompanied by other codes.
It doesn't physically harm anything but it is an indication of a problem.
I'd advise getting it looked at, even if you can't bring it to us.

I haven't gathered enough data to be sure of this, but it looks like this is some sort of issue (as noted above) with the throttle body.

[mike sts]

way back you stated caddillac was working on a software solution that will fix this issue, is there a tsb on this? seems like there should be one

[Cajonkev]

Had it back in a little over a week ago for 0068 and 1101. I have a good relationship with the Service Manager so we chatted and I let him take a look at some of the info here (thanks Will). I also brought in the factory airbox just in case and gave him the option of swapping it out to be sure.

He took my word for it (and the info here) and R&R'd the throttle body under warranty.

Not a single code since...

[mike sts]

They put a new throtle body on the car back in may, i cant imagine that could be it, codes p0068 and p1111 are back. I cleared them and they are back came back on a cold day. if that matters. I wish I could get some gas without ethanol to see if that helps

[mike sts]

ew3erd I found these tsb's could one of these fix my fuel code issues?


Make : CADILLAC Model : STS Year : 2005
Manufacturer : GENERAL MOTORS CORP.
Service Bulletin Num : 3505 Date of Bulletin: JAN 01, 1901
NHTSA Item Number: 10016490
Component: ELECTRICAL SYSTEM
Summary:
DIAGNOSTIC TROUBLE CODES INVOLVING MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR; BAROMETRIC PRESSURE (BARO) SENSOR; ENGINE OIL PRESSURE (EOP) SENSOR; THROTTLE POSITION (TP) SENSOR; ACCELERATOR PEDAL POSITION (APP) SENSOR; A/C REFRIGERANT PRESSURE SENSOR; FUEL TANK PRESSURE (FTP) SENSOR. *TT


Make : CADILLAC Model : STS Year : 2005
Manufacturer : GENERAL MOTORS CORP.
Service Bulletin Num : 3215 Date of Bulletin: JAN 01, 1901
NHTSA Item Number: 10010864
Component: FUEL SYSTEM, OTHER
Summary:
CHECK ENGINE LIGHT ON DIAGNOSTIC TROUBLE CODE P0446, P0451, OR P0453 MAY HAVE A HARD TO FILL FUEL TANK. *TT

[ewill3rd]

That first one is a PI, it pertains to loss of a signal for all those sensors. It also only applies to the 2.8 or 3.6 engine.

The second is also a PI but it is related to cobwebs in the EVAP vent tube that could be causing those issues.

Has your dealer updated the PCM control software? They already replaced the throttle body?

[mike sts]

they swaped out a new pcm into the car, did not correct the problem. Last time it was in they swaped out parts from a good car into mine seems like the fuel injection cleaning and new throtle body only helped the condition enough to keep the light off a few months, there is something they are missing

[ewill3rd]

I'd say they need to talk to TAC but it is hard to get someone who knows about this problem up there.
Maybe some more guys have closed cases? I need to check my TAC cases and close a bunch of them before they come after me!

[blunted]

bump..

Did this ever get resolved?

[mike sts]

Just a FYI this has never been resolved. The car has had an issue with running lean since 9159 miles on it, car now has 63000 miles on it. Most recently the delaer has cleaned the injectors 2nd time, changed throtle body 3rd time, tightened all hoes, put in a nef MAF and PCM ( actually kept code off for 3000 miles longest ever). If anyone has ever found how to fix this, or knows a good caddi repair dealer in RI or CT let me know

[porkfarm]

Check the small hose that goes from the snorkel to the valve cover. ( after the air cleaner ) make sure it is snug and no cracks. That will throw that code.

[Angus Young]

Greeting's I have an 05 1sg now with 131,000 on it, it has been throwing the following codes for the last 20,000 miles and was wondering what the final fix was:
P1101
P0068
P0420
P0430
P0174
I cleaned off the MAF with MAF cleaning solution, ran various fuels, cleared codez several times and still damn light keeps coming back on