Question about 2003 Mercury Mountaineer

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Have a code on my Mercury Mountaineer 2003. 02 Oxygen sensor Bank 1 Sensor 1.Is that not the drivers side upstream sensor

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I would agree with that diagnosis. What was the code number?
P0xxx

Posted on Jul 10, 2010

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Bank 1 means the side of the engine that number 1 cylinder is on. which on a ford in most cases is on the right side ( passenger side) and sensor 1 is towards the front of the vehicle in front of the cat converter. so right front sensor.

Posted on Jul 08, 2010

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Yes, that one is between exhaust maniflod and before the catilice converter, some where in between there, not after converter.

Posted on Jul 08, 2010

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2 Answers

Is the bank 2 sensor 1 oxygen sensor on a 2010 Saturn outlook on the upstream or down stream side?


The upstream on bank 2, which is the opposite of bank 1. Bank 1 is the side with the number 1 cylinder. Downstream oxygen sensors (after the cat converter) are always sensor 2, as in Bank 2, sensor 2.

Mar 19, 2015 | Saturn Cars & Trucks

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Can an O2 oxygen sensor effect another sensor and give a false reading?


Check which side of your engine has cylinder #1. That side is bank 1. Bank 2 is the side opposite of bank 1. So bank 2 is not always passenger side. And since you seem to have extra O2 sensors, I would replace the other upstream and see what happens. Also the mass air sensor can give a trouble code issue to the upstream 02 sensors. Good luck. I've struggled thru this myself.

Mar 06, 2015 | Cars & Trucks

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Mercury sable 2002 fault codes p0132,p1131,p1132


PO132 oxygen sensor high voltage bank 1 sensor 1
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Feb 23, 2015 | Mercury Cars & Trucks

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PO 134 bank 1 location


Bank 1 is located towards the driver's side. Sensor 1 is located upstream just below the exhaust manifold.
EOBD II Error Code: P0134
Description:
Oxygen Sensor (O2S) 1, Bank 1/Heated Oxygen Sensor (HO2S) 1, Bank 1 - No Activity Detected
Possible Causes:
- Wiring.
- Signal wire between the Heated Oxygen sensor and ECM is disconnected.
- Heated Oxygen Sensor defective.
- ECM.

Jul 04, 2014 | 1999 Hyundai Sonata

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1997 grand marquis code p1131 .. what is wrong ?


P1131 Lack Of Upstream Heated Oxygen Sensor (HO 2 S 11) Switch, Sensor Indicates Lean (Bank #1) There should be 2 oxygen sensors the upstream one is the one closest to the motor.

Apr 11, 2013 | Mercury Grand Marquis Cars & Trucks

1 Answer

What is the best way to remove O2 sensor bank 1 sensor 2?


Here is the low-down on oxygen sensors, and their location designations explained:

Oxygen sensors are screwed into the exhaust system at various points. Some people say that there are 4 oxygen sensors, but technically, that is not correct. Only the front 2 are considered oxygen sensors.

These oxygen sensors are screwed into the exhaust pipe or directly into the exhaust manifold, one on each bank. Because they are in front of the catalytic converter, this is often referred to as 'upstream'.

The other 2 are actually called catalyst monitors. They are oxygen sensors, but they serve a different purpose. They monitor the activities of the catalytic converters, thus the name, catalyst monitors. They are screwed into the exhaust one on each bank, after, or downstream, of the catalytic converters.

On a 4 cyl engine, there are only a total of two such sensors, the one in front of the catalytic converter is the O2 sensor, the one behind the cat is the catalyst monitor.

The location names for them are as follows:
  • On a 4 cyl, the front / upstream is called "bank 1 sensor 1" and the rear / downstream sensor is called "bank 1, sensor 2."

  • On a V6 or V8 engine:

    • the passenger side bank on a forward facing engine, or the bank closest to the firewall on a transverse mounted engine, is bank number 1, so the forward / upstream sensor on that bank would be "bank 1, sensor 1."

    • The driver's side bank (forward facing mount engine), or front bank (transverse engine) would be bank number 2, thus the forward / upstream sensor on that bank would be "bank 2, sensor 1," and the rearmost / downstream sensor on that bank would be "bank 2, sensor 2."

Jul 28, 2012 | 2004 Mitsubishi Endeavor

1 Answer

I have a 1997 ford expedition with a 5.4 liter and i just hooked it up 2 a trouble shooter and it gave me the codes 1131 and 1132 and I need 2 no what those codes r please..


P1131 Lack Of Upstream Heated Oxygen Sensor (HO 2 S 11) Switch, Sensor Indicates Lean (Bank #1)
P1132 Lack Of Upstream Heated Oxygen Sensor (HO 2 S 11) Switch, Sensor Indicates Rich (Bank#1)

Check connector and wiring on your sensor. Upstream bank 1 sensor is on passenger side at the bottom of the exhaust manifold. If it looks good, the sensor may have failed internally.

Nov 27, 2010 | Ford Expedition Cars & Trucks

2 Answers

Po130 bank 1 sensor1 my question is where is bank1 sensor1 on a mercury montannier 98 v8


Bank 1 is always on the same side as the number 1 cylinder. Bank 2 is the other side of the engine. Sensor 1 is always before the catalytic converter. Sensor 2 is always after the catalytic converter.

Bank 1 sensor 1 is on the passenger side before the catalytic converter.

Nov 17, 2010 | 1998 Mercury Mountaineer

2 Answers

Oxygen sensor confusion


1/1 is upstream sensor on the number 1 cylinder side, 1/2 is the downstream of the number 1 cylinder side, 2/1 is the upstream of the number 2 cylinder side, 2/2 is the downstream of the number 2 cylinder side. Hope this helps.

Aug 10, 2009 | 2003 Jeep Grand Cherokee

2 Answers

EMISSION FAIL CODES PRESENT P0155


P0155 - Heated Oxygen Sensor Heater Circuit (bank 2, sensor 1)

bank 2 sensor 1 (front, driver side) o2 sensor needs to be replaced

Oct 15, 2008 | Mitsubishi Montero Cars & Trucks

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