You should check the supply voltages to all of the oxygen sensors with a meter to ensure they are getting correct power. If one or all of them are without power (or too much), trace wiring and test for shorts/opens in the wiring.
Possible causes of the code are below:
A code P0141 may mean that one or more of the following has happened:
-Open or short to ground in the wiring harness
-O2 heater circuit wiring high resistance
-O2 heater element resistance is high
-Internal short or open in the heater element
Note: Typically a failed catalytic converter does not cause this code. You're more likely to see a P0420 code for a failed converter.
-Replace oxygen sensor(s)
-Repair short or open or high resistance in wiring harness or harness connectors
Hope this helps.
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Wednesday, December 31st, 2008 AT 3:09 PM