WHERE THE OXYGEN SENSOR LOCATION ON 1999 JEEP GRAND CHEROKEE

The 2005 Jeep Grand Cherokee Laredo 3.7L typically has two oxygen (O2) sensors. One is located upstream (before the catalytic converter), often referred to as the pre-cat or upstream sensor, and the other is located downstream (after the catalytic converter), known as the post-cat or downstream sensor. In many cases, the upstream and downstream sensors are not the same and serve different purposes in monitoring and optimizing the air-fuel mixture and emissions.

Grand Cherokee, ? left off GRAND?

NO COUNTRY TOLD AT ALL, I had 1999 gas, in USA, so yah.
AND PARTS ARE SOLD BEST IN YOUR COUNTRY NOT 12,000 MILES AWAY ,RIGHT?
THE DEALER OF your car has the parts, ask them.
sounds like you have car sold in another country new
and the car is not there now, and no Jeep dealers in town?
bingo, off grid, a in jeep.

3.1L , 5 cylinders?
but did bingo on Grand (WG) model. I hAVE THE BOOK ON THIS.
Jeep Grand Cherokee (WG) (2001); WG (Europe) model w/ 3.1L Diesel (not in USA 2000) no 3.1 sold or part stores with it.
only outside USA has these parts, CKP sensor

I do have a real shop manual on the WG.
WG manual words
"The engine speed sensor is mounted to the trans-
Fig. 4 Engine Speed Sensor Location
mission bellhousing at the right/rear side of the
engine block (Fig. 4) it is a flywheel sensor.

(A FLY tone wheel /RELUCTOR DEVICE.)
seen from rear of bell at 1pm location
2 screws hold it down SEEN IN MANUAL OF CAR.
now the P/N
then who sells it we google earth for this part
YES RARE PARTS SELLER, I see youR problem on this.

engine is from Motori VM m maker. 531 OHV
V.M. VANCINI MOTORI Motor VM 531 OHV - 3.1
I see one in Italy on youtube.

Jeep Grand Cherokee (WJ) (1999-2000) w/ 3.1L Diesel engine.
Jeep Grand Cherokee Diesel 3.1L LTD (TD A) Turbo 1999 Mk II
I say ask UK, THIS SITE DOES LIST 3.1L

http://www.jeepchryslerparts.co.uk/shop/jeep/grand-cherokee/1999-2004-wj-wg/engine/3-1-td/1/jeep.html?symbol=&nazwa=ckp

Google it & read up

Oxygen Sensor Code

Codes don't tell you what to replace,
have use code to diagnose the fault

On Grand Cherokee oxygen sensor locations for 4.0 and 4.7 engines, check this diagrams...







The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle exhaust system. Depending on the emission package, the vehicle may use a total of either 2 or 4 sensors.

Federal Emissions Package (4.0L and 4.7L engines):
Two sensors are used: upstream (referred to as 1/1) and downstream (referred to as 1/2). With this emission package, the upstream sensor (1/1) is located just before the main catalytic convertor. The downstream sensor (1/2) is located just after the main catalytic convertor.


California Emissions Package (4.0L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the rear/upper upstream sensor (2/1) is located in the exhaust downpipe just before the rear mini-catalytic convertor. The front/upper upstream sensor (1/1) is located in the exhaust downpipe just before the front mini-catalytic convertor. The rear/lower downstream sensor (2/2) is located in the exhaust downpipe just after the rear mini-catalytic convertor, and before the main catalytic convertor. The front/lower downstream sensor (1/2) is located in the exhaust downpipe just after the front mini-catalytic convertor, and before the main catalytic convertor.


California Emissions Package (4.7L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the right upstream sensor (2/1) is located in the right exhaust downpipe just before the mini-catalytic convertor. The left upstream sensor (1/1) is located in the left exhaust downpipe just before the mini-catalytic convertor. The right downstream sensor (2/2) is located in the right exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor. The left downstream sensor (1/2) is located in the left exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor.

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The Oxygen sensors on ALL vehicles are located in the exhaust. I think you may find the following articles to be very helpful with your question. Just click the links below.

Which Oxygen Sensor Is It?

What Else Could Be Wrong?

Grand Cherokee oxygen sensor locations for 4.0 and 4.7 engines...






An O2 sensor is a galvanic battery that provides the PCM with a voltage signal (0-1 volt) inversely proportional to the amount of oxygen in the exhaust. In other words, if the oxygen content is low, the voltage output is high; if the oxygen content is high the output voltage is low. The PCM uses this information to adjust injector pulse-width to achieve the 14.7-to-1 air/fuel ratio necessary for proper engine operation and to control emissions.

The O2 sensor must have a source of oxygen from outside of the exhaust stream for comparison. Current O2 sensors receive their fresh oxygen (outside air) supply through the O2 sensor case housing.

Four wires (circuits) are used on each O2 sensor:
* 12-volt feed circuit for the sensor heating element
* Ground circuit for the heater element
* Low-noise sensor return circuit to the PCM
* Input circuit from the sensor back to the PCM to detect sensor operation


Hope helps (remember to rate and commene this)..

They are on the exhaust up front
On a V8 you have a left and a right bank O2 sensor

under truck follow the exhaust system back from engine - o2 sensors are screwed into exhaust pipe

it is located right at the tail shaft of the transfer case where the rear drive shaft comes out.its the only sensor in that area.

Sensor #1 is the sensor before the converter (upstream sensor)