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NewDakOwener
Dodge Dakota
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9/01/2005
14:28:59
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 Subject: Exhaust O2 Sensor
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Message:
I have replaced this sensor twice on a 98 V-6 and I still get a "Check Engine" Light with a code indicating the exhaust O2 sensor is bad. I have been checking the wireing and have not found a solution yet. Does anyone have any solution or good hints of what to check next.
NewDakOwner
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kotaowner
Dodge Dakota
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9/01/2005
14:36:14
| RE: Exhaust O2 Sensor
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Message:
not to be rude but did you reset the computer after you replaced it the first time. i made that mistake and bought 2 of em before i realized my mistake and reset it.
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NewDakOwener
Dodge Dakota
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9/01/2005
17:17:31
| RE: Exhaust O2 Sensor
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Message:
Yes, the computer is reset and I have no "Check Engine" light for a short time.
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cuzindoug
GenIII
9/01/2005
17:34:29
| RE: Exhaust O2 Sensor
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Message:
Check your connections/harnesses that plug into the PCM for corrosion. You might also want to trace the wiring that runs from the O2 sensor up to the engine compartment, you might have a kinked or chaffed as it passes by/under the body and frame.
If it ain't broke, fix it til it is.
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NewDakOwner
Dodge Dakota
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9/06/2005
11:12:55
| RE: Exhaust O2 Sensor
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Message:
the problem appears to be solved. We found the 12V supply wire was causing the voltage to drop to ~5V. We replaced the wire and all appears well. This only showed up under load. When we put an OHM meter on the wire it showed no resistance but when voltages were checked the voltage drop was seen. This seems really odd.
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