Question about 2003 GMC Envoy
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
The P0101 code is indeed a code indicating an issue with the MAF sensor. It could be something as simple as cleaning the sensor, or it could be faulty and in need of replacement.
Now, the P1870 code refers to the transmission, and a condition in which the PCM is detecting excessive slipping. That is to say it perceives the transmission slipping as it compares engine speed (RPM) and vehicle speed (MPH) and should a ratio be exceeded then the PCM will set code P1870. I would expect that you would notice a bit harsher shifting in response to this code, particularly on the 1-2 shift as the PCM will command higher fluid pressure to combat the slipping.
Now, it is possible that the an issue with the MAF would cause signals to the PCM to change significantly and to such an extent that the PCM would think something is off with the transmission, so I would start there, with the MAF sensor and see if that helps as it appears you were already thinking.
Posted on Jan 02, 2009
did you spray the maf sensor or intake hole ?if you didnt spray maf then probly not! have some one turn the key why you listen in the fill gas hole for pump noise ? sould here somthing for 2 seconds at least besure you ear is there before key is turned , also check you ecu fuse to see if it may be blown .? also you could try unhooking battery cable for 20 minutes neg side only then rehook it and try to start it! good luck
Posted on Feb 17, 2009
Track the p0340 first camshaft timing is very important and could possibly cayse your other codes,Call your local GMC dealer I think I remember a bulletin about this code.
Posted on Aug 23, 2009
give these websites a try www.alldatadiy.com and www.autozone.com if all fails stop by your local library and get your hands on a Haynes auto repair manual for your car wish you the best of luck Michigan Man.
Posted on Nov 26, 2009
Tips for a great answer:
May 16, 2017 | GMC Cars & Trucks
Dec 19, 2016 | 2003 GMC Envoy
Oct 22, 2014 | 2003 Nissan Altima
Jan 21, 2014 | 2003 Suzuki Aerio
Oct 04, 2011 | 2003 GMC Envoy
Mar 03, 2010 | 1994 Buick LeSabre
Feb 13, 2010 | Pontiac Trans Cars & Trucks
Jul 18, 2009 | 2003 Pontiac Grand Am
Dec 19, 2008 | 1996 Buick Century
208 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: