Thread: P0133 and P1133
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Old 03-13-2015, 01:38 AM   #2
fdryer
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Join Date: Jan 2006
Location: NYC
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2003 L-Series 3.0L Sedan
Default Re: P0133 and P1133

If the O2 sensor is original, examine wiring to be sure wiring and connections aren't causing poor electrical connections. If wiring is fine, replace the O2 sensor.

Both codes, presuming wiring is in good condition, point to a worn out O2 sensor (350k kms). What condition is the catalytic converter?

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