1990 buick lesabre mass air flow sensor problems

The main thing is to check the grounds, fuses and look for cabling that may open via animals before you go out and spend money for controllers (PCM ABS and TCM). Spent hours researching over the internet and purchased service manual (ebay cheap) which helped a lot. Jacked up the car and traced the Sensor wired to the PCM and noticed taped around the harness was slightly removed and there it was a chewed cable which was the sensor wire. The main symptoms of a bad or failing MAF sensor include: Check Engine Light Illuminates. I remove all 3 connectors from the PCM (remove battery cables first) and ohm out sensor wire to the PCM pins which all were open. The most common symptoms of a bad mass airflow sensor are a check engine light on your dashboard and engine performance issues. The signal is sent to PCM then to EBCM (ABS) controller. Scanning the car showed ABS code C0236, Rear Wheel Speed signal missing. Good to have a service manual to look at the wiring diagram which shows the EBCM and PCM wiring.

Related to my question (today 7-25-22) I did a lot of researching with my 2005 Buick failing with ABS Service Brake System lights up and drop into Limp mode, lowers to 2nd gear. Whichever sensor your engine uses, the ECM will not be able to optimize fuel injection without accurate air mass information from a working sensor. A faulty mass air flow sensor may also cause your cars check engine.

a damaged sensor may lead to performance issues.

Does 2005 Buick Rainier cxl 5.3L vehicle have 3 speed sensors: 2 front wheel and 1 rear transmission sensor? Also, does the rear transmission speed sensor resides on the transmission send signal to PCM first then goes to the EBCM when a C0236 code failure. Buy 1999-2005 Buick LeSabre Air Mass Sensor Replacement for a low price of 37.95 at PartsGeek.

1990 buick lesabre mass air flow sensor problems