MAP sensor location

1987 BUICK LESABRE
150,000 MILES • 3.8L • 6 CYL • 2WD • AUTOMATIC
Avatar
BUICK_DUDE
  • MEMBER
  • 91 POSTS
The obd1 system is giving code 34 for low map sensor, where exactly is this located?
Feb 22, 2020 at 5:37 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
Hi,

The code is for a mass air flow sensor (MAF). It is located between the air filter box and the throttle body in the air induction tube. See pic 1.

If you look at pic 2, it shows the procedure for replacement.

Let me know if this helps or if you have other questions.

Take care,
Joe
Feb 22, 2020 at 5:58 PM
Avatar
BUICK_DUDE
  • MEMBER
  • 91 POSTS
Okay, awesome!! Rock Auto parts catalog showed a different style. Thanks for clearing that up!!

Will this malfunction have anything at all to do with transmission shifting??
Feb 22, 2020 at 6:41 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
Hi,
In some cases, a faulty MAF can cause shift pattern changes. Is that what you experience?

Joe
Feb 22, 2020 at 7:25 PM
Avatar
BUICK_DUDE
  • MEMBER
  • 91 POSTS
Yes, the car shifts into gear. then it moves a tad and goes nowhere like into neutral but with the car shifter still in gear.

I am waiting on the thermostat, intake air sensor and IAC to come in the mail. I am weary of ordering the master air flow sensor on the intake in-between the filter housing and throttle body to be honest, because of the shifting problem and the fans not turning on, but I could use the car and i am going to order it soon. I will get that video recorded once I get the before mentioned parts this week. and then wait for the MAF.

By the way, I still not sure if this car has the MAP sensor. I bought it. rockauto showed it their parts catalog for this application but I can't find it anywhere on the engine.
I've attached a picture of it below.

Thanks so far for the advice. getting the link to direction to pull engine codes helped me out.
Feb 24, 2020 at 10:02 PM
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
According the Alldata service manual, it has a MAF which is in place of the MAP.

Let me know how things turn out for you.
Joe
Feb 25, 2020 at 4:33 PM