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Old 07-07-2018   #1
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Fault code P0402

I have been having problems with P0402 causing the engine light to come on for some time now. I reset it and everything is fine for a while. I have now done two identical trips and the light has come on almost at the same time each trip. It was a round trip of 600 miles on each outward leg no light came on on both return legs the light came on towards the end of the 300 miles when I decided to push on a bit more to get home. The MH is an Autotrail Ducato 3.0 litre 2007 I have replaced the throttle body, miles around 30,000 The engine runs very smooth with no loss of power at any time. Can anyone with experience of this problem give me some idea of what to check.
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Old 07-07-2018   #2
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Re: Fault code P0402

Donít check anything take to dealer and ask for your ecu software to be updated p0402 common fault 3.0litre !this will also fix intermittent juddering when setting off you think it runs ok I can tell difference after update take to fiat professional dealer better that throwing loads of bits at it!
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Old 1 Week Ago   #3
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Re: Fault code P0402

I had same problem and same code shoeing. I removed my air filter and found a dead mouse in the manifold . That has now cured the problem.
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Old 1 Week Ago   #4
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Re: Fault code P0402

Lunch sorted then ...!!! lol
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