Volkswagen Polo IV (2002-2005) - 02 1.2 Engine warning light, given 5 fault codes

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Sun 23 Aug 2009 12:28
02 1.2 Engine warning light, given 5 fault codes - brynposey
Our 1.2 polo SE has spent most of it's life in the garage.
Recently it has 3 coils replaced one after the other. Now the engine warning light has come on again. I have used a fault code reader these codes have come up has any one got an idea as to what it might be;

16514 O2 Sensor Circ.,Bank1-Sensor1 Malfunction
16556 Fuel Trim,Bank1 System too Rich
16785 Exhaust Gas Recirc.Flow Insufficient Detected
17811 EGR Flow Deviation
17925 Main Relay Circ. Electrical Malfunction

I've had two suggestions from mechanically minded mates they reckon it's either my "Lambda Sensor" or the "Throttle Body".

Any ideas or suggestions gents

Edited by Dynamic Dave on 12/09/2009 at 15:47

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Fri 11 Sep 2009 21:34
02 1.2 Engine warning light, has given 5faultcodes - sun12
Hi have had the same problems as you,changed the throttle body,coils,lambda sensorand the EGR valve at a cost of £800.00 to date,auto elctrician has now said from his previous history of this problem it is the timing belt which is slipping a tooth causing problems.having it re-timed tommorow will let you know the result

Edited by sun12 on 11/09/2009 at 21:35

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Fri 11 Sep 2009 22:41
02 1.2 Engine warning light, has given 5faultcodes - bell boy
needs a new chain and tensioners
you need to keep to regular oil changes on this poor designed engine as its the oil that causes the chain slip its the lack of oil that causes it to slip see
simples
no wonder ford are coming back to profit
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