Xsara Picasso 1.6 Ax 2002

[Jesscasse]

Hi, can anybody help? I have a 2002 petrol 1.6 picasso,the engine light came on with fault code p0170 ( it doesn't say rich or lean) just fuel trim,this happend a week after a new clutch and the car has always been sluggish since owning about a year ago, the car also feels like a constant flat spot and judders when idling,I have fitted a new map sensor with no luck and changed the fuel filter. I am great full for any help thanks I just want the em light off

[paul.h]

Welcome to the forum.

 

First thoughts are it may be a lambda sensor in the exhaust - check the wiring/connectors to them but the first one may need replacing, preferably with a good quality one. You could also try cleaning the throttle body around the throttle plate to remove any carbon build up which can affect idling, check the spark plugs are ok, check the engine air filter is clean, there are no air leaks, the engine coolant and inlet air temperature sensors are ok.

 

Ideally, you should use a code reader that shows live data, this will show the temperatures, that both the lambda sensors are ok - the first should be switching values about every second and the second should be steady.

[Jesscasse]

Hi,thanks for the reply and welcoming me, I'm also thinking lambda sensor the second one was cacked in old oil inside the block connector,all plugs look fine but a little too clean with no deposits meaning its running too rich or hot,will check lambada on laptop tomorrow thanks

[Jesscasse]

No deposits on plugs means lean not rich sorry