Question about 2002 Buick LeSabre
A 6ya expert can help you resolve that 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.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
MAP and O2 sensor are two separate items. MAP, reads manifold pressure, O2 reads exhaust content. O2 sensor often is a false reading not to be ignored but should not be immediately changed till other items are corrected. MAP sensor is often mounted on the firewall and can be identified as having an electrical connector and a vacuum hose attached to it. (ask a parts house to show you one and it will make finding it easier) Check for vacuum leaks in the hose and make sure the hose is well connected at both ends before changing the sensor. You may also want to clean the Mass Air Flow sensor located between the air duct hoses running from the air filter box to the throttle body. There are two small wires inside it that can be cleaned carefully with carb cleaner and a Q tip.If dirty, it can cause idle fluctuations or stalling.
Posted on Jun 17, 2009
If everything you described is true, then there's a strong suspicion it's the ECU. Whenever the 'CHECK ENGINE' light comes on, the ECU (Engine Control Unit) sets a Diagnostic Trouble Code (DTC). These codes identify the particular engine management system which caused the light to come on. You'll need to use/find an OBDII (On-Board Diagnostic) Scanner to retrieve any code which have been stored in the ECU computer. Since you stated there were no trouble codes (DTC's), there's one last thing to try... ZERO out the ECU (do this by disconnecting the battery cables from the battery posts... connect the cables together for 30 seconds (this ZERO's out the ECU). Afterward, reconnect the cables to the battery. If the problem recurs (and there's no DTC's), the problem is in the ECU.
Posted on Oct 18, 2009
Tips for a great answer:
Jan 15, 2018 | Nissan Cars & Trucks
Feb 13, 2015 | Cars & Trucks
Apr 03, 2014 | 1995 Pontiac Bonneville
Jul 30, 2012 | Chevrolet Silverado 1500 Cars & Trucks
Dec 16, 2010 | 1991 Acura Integra Hatchback
Aug 02, 2010 | 1988 Chevrolet Camaro
Nov 20, 2009 | 2000 Nissan Maxima
Nov 02, 2009 | 1998 Nissan Sentra
Jun 10, 2009 | 2000 Oldsmobile Intrigue
20 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: