Pin out number for upstream o2 sensor from ecu

SOURCE: Upstream O2 sensor location?

That is the first sensor closest to the engine. The downstream sensor is the one behind the converter.
Good luck.
Please rate this response , and let me know if ya need more help!

alex metro

• 364 Answers
• Posted on Oct 11, 2008

SOURCE: Installing universal Oxygen sensor

here is the 97 civic electrical diagrams. after you download and unzip the file, try 17252.pdf.

SOURCE: 2004 gto ls1 motor is running rich and dtc code is P0131

that would be your best bet it is very hard to diagnose a injected v8 with out the right equipment but speaking from experience ( due to the fact we in Australia built these cars) the oxy sensors cause all sorts of problems and swapping them over does't necercarly prove much

Mike Butler

• 6674 Answers
• Posted on Jan 11, 2009

SOURCE: 1997 Dodge Stratus V6 oxygen sensor location

Upstream, as in ahead of the converter, back toward engine. Start at converter and work your way back, should be on exhaust pipe or even on manifold.

Duane Wong

• 6826 Answers
• Posted on Oct 07, 2010

SOURCE: Where are the four O2 sensors on a 2003 Montero

According to the service literature I read, the 2003 Montero Sport with the 3.0 or 3.5 L engine does not have O2 sensors listed even in the maintenance schedule. The 2.4 L engine has it on the exhaust manifold though.
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However, the following lists the par, though for before or after the catalytic converter:

http://www.partstrain.com/store/index.php?VN=4294967180+4294966587+4294964143+&Nr=AND(universal:0)&N=0&Ntt=Oxygen%20Sensor

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I think that $250 to $300 is reasonable if the Oxygen sensors are stuck in there with rust and the threads are preserved by the technician. Oxygen Sensor replacement can be tricky.
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Good luck on this repair.

Exhaust Manifold

REMOVAL & INSTALLATION

2.4L Engine

1. Remove or disconnect the following:
   
   
   
   • Negative battery cable
   
   CAUTION
   Wait at least 90 seconds after the negative
   battery cable is disconnected to prevent possible deployment of the air bag.
   
   
   
2. Heat cowl from the exhaust manifold
   
3. Aspirator valve assembly, if equipped
   
4. Oil dipstick and guide
   
5. Oxygen (O2S) sensor connector and ground cable, if equipped
   
6. Exhaust pipe from the manifold
   
7. Exhaust manifold and gasket from the engine
   To install:
   
   
8. Install or connect the following:
   
   
   
   • Exhaust manifold. Torque the M8 mounting nuts to 22 ft. lbs. (29 Nm) and the
     M10 mounting bolts 36 ft. lbs. (49 Nm). starting from the middle and working
     outward.
     
   • O2S sensor connector and ground cable, if equipped
     
   • Exhaust pipe to the manifold. Torque the nuts to 35ft. (49 Nm).
     
   • Aspirator valve assembly, if removed
     
   • Heat cowl to the exhaust manifold. Torque the bolts to 117 inch lbs. (13
     Nm).
     
   • Negative battery cable
   
   
9. Start the engine and check for exhaust leaks.

1. Remove or disconnect the following:
   
   
   
   • Negative battery cable
     
   • Exhaust pipe from the exhaust manifolds
     
   • Oil dipstick, guide and O-ring
     
   • Heat shields
     
   • Exhaust manifolds
   
   
2. Clean the gasket mounting surfaces. Inspect the manifolds for cracks,
   flatness and/or damage.
   To install:
   
   
3. Install or connect the following:
   
   
   
   • New gasket and exhaust manifold. Torque the nuts to 33 ft. lbs. (44 Nm) on
     3.0L engines and 22 ft. lbs. (29 Nm) on 3.5L engines.
     
   • Heat shield, Torque the bolts to 10 ft. lbs. (14 Nm).
     
   • Exhaust pipe to the exhaust manifolds. Torque the nuts to 35ft. (49 Nm).
     
   • Oil dipstick, guide and new O-ring
     
   • Negative battery cable
   
   
4. Start the engine and check for exhaust leaks.

Testimonial: "Thanks, it gave me some assurances the work was reasonable. I am pretty handy, this would have been new territory. Others made it sound VERY simple."