Fault code P0170

digi · May 16, 2013

I've just done a scan of my landrover mk1 2002 using the mxiscan ms300, i now get 2 fault codes the original n/a and a second P0170, i looked it up in the book and it says fuel trim malfunction (bank 1) what does this mean and how do i fix it, or is it a garage only fix.

I don't know what fuel trim malfunction (bank 1) means, at least i know now the scanner works and gives me an actual fault code, for a while i only got pend:00 and n/a now i get P0170 aswell, i just need to find out what the problem is and fix it.

Nodge68 · May 16, 2013

What engine is it? I'm assuming it's a 1.8 petrol. It means the mixture is out and the ECU can't compensate. Iirc 0171 is lean and 0172 is rich. 0170 is a generic mixture error code. Does it do it all the time or only above a certain rpm?
Check for air leaks in the inlet system.
Or the O2 sensor is playing up.

sijwhite · May 16, 2013

Does this help? : P0170 Fuel Trim Malfunction (Bank 1)

Or just Google fuel trim malfunction (bank 1) to get more pages.

digi · May 16, 2013

Thanks for the replies, it's a petrol engine, it's the first time i've got the p0170 code all the other times i've checked it when engine light as been on i get fault pend:00 and n/a.

I think it may be some type of air leak as when the engine is turned off i can hear a shhh as if air is escaping from the engine but i can't figure out were from, i've checked for splits/cuts and can't find any, i'll go have another look i may get lucky.

fishlander · May 16, 2013

Is it a V6??

digi · May 16, 2013

Don't think it is, i don't know alot about engines, 1.8 petrol 2002 with the coil pack, if that helps any.

fishlander · May 16, 2013

digi said:
Don't think it is, i don't know alot about engines, 1.8 petrol 2002 with the coil pack, if that helps any.

Oh ok,it's just with a V engine a row of cylinders is callad a Bank!!

Nodge68 · May 16, 2013

fishlander said:
Oh ok,it's just with a V engine a row of cylinders is callad a Bank!!

The codes always say bank 1 even if the engine has only 1 bank of cylinders like in a 4 pot.

fishlander · May 16, 2013

Nodge68 said:
The codes always say bank 1 even if the engine has only 1 bank of cylinders like in a 4 pot.

You learn something new every day!!!

Madmandy · Apr 14, 2014

Hi what part do I need to replace for this particular fault code please? 0170

digi · Apr 14, 2014

The problem was sorted by replacing the front lambda sensor and emptying a bottle of cataclean into the petrol tank.

Lambda sensor also known as the o2 sensor or oxygen sensor.

Fault code P0170

digi

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