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Author Topic: Fuel Trim  (Read 525 times)

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4huftys

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Fuel Trim
« on: 01 April 2009, 11:17:26 »
Keep getting error codes 0170 and 0173 fuel trim bank 1 and 2 can anyone help with this please
cheers Dave
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kcl

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Re: Fuel Trim
« Reply #1 on: 01 April 2009, 11:21:58 »
MAF related, assume you have 2,6 or 3,2 engine... Do a search, enogh of threads about these codes
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4huftys

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Re: Fuel Trim
« Reply #2 on: 01 April 2009, 11:26:24 »
Yes forgot to say 2.6 engine
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Proz

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Re: Fuel Trim
« Reply #3 on: 01 April 2009, 11:28:58 »
I had this on my 2.2 and was cured by new genuine Maf  :y
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Kevin Wood

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Re: Fuel Trim
« Reply #4 on: 01 April 2009, 12:08:09 »
MAF is a possibility, and we have seen a couple of failures on DBW engines.

Could also be an air leak in the ducting, so inspect that carefully for splits and make sure all the joints are sound. Could also be any fuelling issue that affects both banks such as clogged fuel filter, low fuel pressure, coolant temperature sensor, etc.

Are you able to get it to a fault code reader that will show live data? Would be interesting to see what the MAF is reading at idle when fully warmed up, and also at a fast idle (2500 RPM).

MAFs are expensive so it's worth a bit of diagnostics just to confirm.

EDIT: While you've got a code reader on it check the coolant and air temperatures are plausible and have a look at the fuel trim values for both banks. See if they have both moved in the same direction.

Kevin
« Last Edit: 01 April 2009, 12:11:32 by Kevin_Wood »
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webby23

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Re: Fuel Trim
« Reply #5 on: 02 April 2009, 22:13:25 »
Exactly the same engine and problem as me too.

Solved with replacement MAF sensor, EML light not been on since.



 :)
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