GM 3800 engine sensor location picture and diagram.
1. Fuel pressure regulator       2. Idle Air Control Motor (IAC)            3. Mass Airflow sensor (MAF)
4. Throttle Body                        5. Throttle Position Sensor (TPS)      6. Fuel Injector
7. PCV Valve                           8. Coolant Temp sensor (ECT)          9. Evap Purge Solenoid
Typical engine data sensor and control component locations on the GM 3.8L 3800 v6 engine.
Exact location may vary depending on vehicle year / make / model.
Click on a number for a description of the component.
A few related auto repair questions and answers.
2003 pontiac grand prix computer trouble code p0128.
1999 Buick regal has OBD2 code p0341 cam sensor signal error.
1999 Buick Park Avenue check engine light.
where is the vehicle speed sensor.
In most cars, the vehicle speed sensor is located
in the tail shaft housing of the transmission. This is
where the axle comes out on the passenger side
of the trans. On front wheel drive cars. Best
viewed from under the car.
where is the map sensor on this 3800 GM v6?
The MAP sensor is located in position seven on
the picture. The MAP sensor is on top with an
electrical connector. The PCV valve is under the
sensor. The sensor and the retainer unscrew from
the manifold, and the PCV is inside.
where is the DPFE sensor?
DPFE sensor is not a sensor that any GM gas
vehicles use.
where's the
PCV valve located on a 3800 supercharged engine?
On the supercharged, it is located under a square
metal plate, in similar location as EGR valve on the
non-supercharged. See Above.
Where is the Ambient Air Temperature sensor located at?
That sensor is located on the front core support, in
front of the radiator. Left or right side depending
on make, model, and year vehicle.
where is the cam shaft position sensor at.
On the 3800 V6, the camshaft position sensor is
located behind the water pump pulley. If you were
to look at the pulley straight on, it is at about the
9 o'clock position.
Where is the crank sensor located at.
The CKP- Crankshaft Position Sensor, is located
behind the crank pulley, It will need to be removed
to get to the sensor.
Buick Lesabre 3800 v-6. Temperature gauge needle laying down to the
right past the H. Only moves,jumps a quarter of a inch when ignition is turned
on. Bad temperature sensor?
The temp sensor only gives a reading to the
gauge with the key ON, so this is most likely an
instrument panel cluster (gauges) problem.
Ok I replaced that temperature sensor in the photo above, and the new one I
got had just two terminals, while the old plug has three receptacles.
Sounds like the parts guy gave you the wrong
sensor. Some cars have 1 for the gauge or light,
and another for the computer.
Where are the air bag sensor location(s)?
That depends on which airbag sensor you are
referring to, and what make, model and year.
can I replace the three wire connector going into the MAP sensor
Yes, you can either buy a new connector with wire
leads in it, or go to a junkyard and cut a harness
to get the connector you need.
thanks for the info. Awesome site. You do a great job
where is the modification switch on 95 olds. 88 3.8L.
I have never heard of a switch even close to the
name you are asking about.
ok water pump went out shredding the belt and unplugging the camshaft
position sensor put in new water pump and belt and plugged the sensor back
in but it wont start does that mean its out of time and if so how do you re time
95 pontiac transport
Those vehicles don't get out of time easily. Since the cam sensor got
unplugged by the stray belt, you probably have something wrong with either
the sensor or wiring harness, or even both. I'd check the connector to make
sure it didn't get damaged, or any terminals that may have been pulled out or
backed off. There could be a broken wire inside the harness that runs down
the engine from when it broke. It has to be something related to the failure
and repairs made. Double check your work and look for the previously
mentioned problems
There are 2 other sensor where my MAF sensor is what are they
I have a series III 3.8 non S/C  has a very strong vacuum in crank case..  Hard
suction when removing oil cap... Replace PCV valve and seal and spring..
Problem still there..
There would be a Intake Air Temperature sensor
that is located in the rubber boot to the throttle
body. And depending on the year of your vehicle,
there could be an Idle Air Control Valve, that is just
past the MAF sensor and on the throttle body.
If the PCV valve and O rings are not the problem,
then the lower intake manifold gaskets probably
are causing your problem.
I have a 2003 Pontiac Bonneville and it had a check engine light on that read
TPS sensor low voltage. I cleared the code and the engine died and won't
start anymore. What should my absolute TPS % be without engine running?
Mine is 0.0 which I don't feel is right.thx in advance
Car Questions:  Buick        Chevrolet        Oldsmobile        Pontiac
TPS voltage should be around .50 volts. If you are
showing 0, check each wire at the connector by
pulling on them to see if one breaks.
1992 trans sport van with a 3.8 liter engine water temp sensor is located right
under the throttle body . Remove  the air breather and look under the throttle
body .
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3800 V6 Engine Sensor Locations

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10. Egr Valve                         11. Intake Air Temp Sensor (IAT)       12. MAP sensor