2001 Jeep Wrangler P0432 Code

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Hi I have a 2001 jeep wrangler set code p0432 this jeep has 4.0L motor it has two mini cats as well as the main cat jeep is running fine just has intermittent check light thanks for any help you can give me

Feb 27, 2006 at 3:42 AM

BLUELIGHTNIN6

✓Experienced Mechanic
16,542 POSTS

P0432 Main Catalyst Efficiency Below Threshold (Bank 2)

This engine code can be triggered by any one of the following:

1.) The catalyst in the catalytic converter is cracked, clogged, or otherwise damaged.
2.) The secondary O2 sensor is malfunctioning.
3.) There is an exhaust leak.
4.) The computer unit is faulty

Need to have converters flow tested. Also need to check oxygen sensors. To learn how to check an O2 sensor, follow the link below..

https://www.2carpros.com/how_to/how_to_test_oxygen_sensor.htm

Thanks for using 2CarPros.com!

Mar 4, 2009 at 3:06 AM

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Suggested Repair

Flow-test the catalytic converters and check the oxygen sensors. If those checks are good, inspect for an exhaust leak, a damaged catalyst, or a faulty computer.

Conversation Summary

A 2001 Jeep Wrangler 4.0L with two mini cats and a main cat is setting P0432 and otherwise running fine, with only an intermittent check engine light. The expert identifies P0432 as main catalyst efficiency below threshold on bank 2, which can be caused by a damaged catalyst, a faulty secondary oxygen sensor, an exhaust leak, or a faulty computer. Recommended next steps are to flow-test the converters and check the oxygen sensors.

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2001 Jeep Wrangler P0432 Code

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