Thread: Jaguar dtc p0420
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Old 08-08-2012, 06:53 PM   #1
danielsatur
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Jaguar dtc p0420
Transient DTC P0420 - Low catalyst on bank 1.

It wasn't the catalytic converter, or H02 sensor.
HO2 sensor = Heated oxygen sensor wasn't doing the job during cold start.


Root cause was a Bad/old battery.
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