Anonymous Posted on Oct 19, 2012

I have check engine light on and whe i checked the code is p4029

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Anonymous Oct 19, 2012

PO ---what? 402 PO ---what? 402
Anonymous Oct 19, 2012

Sorry thats P0429 Sorry thats P0429
Anonymous Oct 19, 2012

I can't find PO 429 Not a Generic Code must be specific to your brand car may be a failed exhaust converter,the code is in that area as far as numbers go

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Anonymous

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Posted on Oct 20, 2012

Anonymous

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P0429 Description The Engine Control Module (ECM) monitors the switching frequency ratio of heated oxygen sensors 1 (front O2 sensor) and heated oxygen sensors 2 (rear O2 sensor).

A three way catalyst converter (Manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase.

When the frequency ratio of heated oxygen sensors 1 and 2 approaches a specified limit value, the three way catalyst malfunction is diagnosed.
Possible causes - Catalyst Heater Control harness is open or shorted
- Catalyst Heater Control circuit poor electrical connection
- Faulty Powertrain Control Module

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