2002 Dodge Intrepid O2 sensors bank 1sensor 1

Tiny
ANJIE
  • MEMBER
  • 2002 DODGE INTREPID
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 131,000 MILES
Trying to find out why after replacing this sensor 3 times (bank1 sensoe 1) does the car still read that it is bad? We did the check senors. They came up good took it to a dealer they reset the computer and engine light, went 8 miles and on came the light again. Now i'm stuck wondering whats going on now. Already replaced drive train comp. Too not cheap. Any suggestions as to what else we can do?/
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Thursday, January 22nd, 2009 AT 10:55 PM

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Tiny
ZACKMAN
  • MEMBER
To help diagnose, we need the exact diagnostic code number.
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Friday, January 23rd, 2009 AT 12:25 AM
Tiny
ANJIE
  • MEMBER
Error code is p0135. Now they think maybe its a ground wire for that sensor? How expensive is that?
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Friday, January 23rd, 2009 AT 11:56 AM
Tiny
ZACKMAN
  • MEMBER
Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
What does that mean?

This code refers to the front oxygen sensor on Bank 1. The heated circuit in the oxygen sensor decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0135.

Symptoms

You will likely notice poor fuel economy the illumination of the MIL.

Causes

A code P0135 may mean that one or more of the following has happened:

* O2 Heater element resistance is high
* Internal short or open in the heater element
* O2 heater circuit wiring high resistance
* open or short to ground in the wiring harness

Possible Solutions

* Repair short or open or high resistance in wiring harness or harness connectors
* Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)

***Usually it is the ground wire, as the O2 sensor grounds to the PCM. It is hard to put a labor value for the technician to find the short. He has to start from the O2 sensor all the way to the PCM.***
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Friday, January 23rd, 2009 AT 10:46 PM

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