Technical New member - dreaded engine fault light

[Irishstilo]

Hi all,
New member to the forum and one who has just got a 2003 1.2 Active. Nice car, and has had new cambelt, gearbox and waterpump all fitted recently. However just after picking it up after alll the work was done, have the dreaded engine fult light. Ran it through the code reader and the following is showing up -

P0130 (pending)
P0136 (pending)

P0135
P0141
P0443
P1135
P1141

This seems to be linked in with the 02 Sensor, so was wondering if it might be a simple replacement job. Car runs absolutely fine, with maybe a very slight drop in mpg. If I missed this query from elsewhere in the forum, its my own inept searching abilities.
Thanks all.

 

[richydraper]

Hi all,
New member to the forum and one who has just got a 2003 1.2 Active. Nice car, and has had new cambelt, gearbox and waterpump all fitted recently. However just after picking it up after alll the work was done, have the dreaded engine fult light. Ran it through the code reader and the following is showing up -

P0130 (pending)
P0136 (pending)

P0135
P0141
P0443
P1135
P1141

This seems to be linked in with the 02 Sensor, so was wondering if it might be a simple replacement job. Car runs absolutely fine, with maybe a very slight drop in mpg. If I missed this query from elsewhere in the forum, its my own inept searching abilities.
Thanks all.

Hi #Irishstilo ,
Welcome to FF, sorry to hear bout the MIL! never a very good start to ownership when it has faults. Don't worry too much, at face value, this one seems an easy one! sorry if i waffle on to much in this post.

heres a description of all your codes:-
P0130 O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0136 O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)
P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
P0443 Evaporative Emission Control System Purge Control Valve Circuit Malfunction
P1135 Preheating resistance 1 above catal.
P1141 Lambda 2 signal above catal. (deviates)

your sensor 1 and sensor 2 fault codes are the pre and post lambda sensors respectively ('Bank 1' just means that the fault relates to sensors in first 6 cylinders, because OBD2 supports upto 12 cylinders, 'bank 1' is cylinder 1-6 and 'bank 2' would be cylinder 7-12. this is because you could have a V12 and each side of the V is called a bank. Anyway i digress, all the fault codes for Stilos will fall under bank 1 as they only have 4/5 cylinders)

I think we can safely say you have an issue with both your Lambda sensors (O2 Sensors/oxygen sensors if you'd prefer) and the fuel vapor recovery solenoid.

do me a favor... open your bonnet, remove the battery cover and check Fuse 11 (blue 15 amp?). in the fuse box on top of the battery, in the engine bay. if its blown replace it. clear the codes and see if any codes come back (they *should* appear back instantly if there is still an issue but it can take 200 or so miles to reappear in some cases)


Looking at the wiring diagram Fuse 11 (F11) is the ONLY common thing between both lambdas and the fuel vapour recovery solenoid. (K15, K17 and L10)


post back with what you found/how you fixed it!

 

[Clivvy]

bloody hell Richy that's a really good response!!

 

[richydraper]

Thanks Clive! These are the kind of responses I would like to give to nearly every reply I post. Unfortunately not all faults may be as easy to solve as this one.

To be honest its not rocket science, although to some it may seem like it.

Its just a case of questioning things

The engine light is on!
why is it on?
because the lamdas are broken!
How do you know know its the lambdas?
The fault codes say so!
What do the fault code say?
The heating circuit isnt right!
Why isnt it right?

Then it gets physical
What could stop it from working?
Well it could be wiring, electrical connectors, damaged compnent, fuse or relay!
So what should I do?
Check the wiring, electrical connectors, for a damaged component, blown fuse or dicky relay!
That seems far too much like hard work what can I do to make it easier?
Start with the easiest bit first!
So i could check the fuse first?
Yup simples!

 

[Irishstilo]

Thanks Clive! These are the kind of responses I would like to give to nearly every reply I post. Unfortunately not all faults may be as easy to solve as this one.

To be honest its not rocket science, although to some it may seem like it.

Its just a case of questioning things

The engine light is on!
why is it on?
because the lamdas are broken!
How do you know know its the lambdas?
The fault codes say so!
What do the fault code say?
The heating circuit isnt right!
Why isnt it right?

Then it gets physical
What could stop it from working?
Well it could be wiring, electrical connectors, damaged compnent, fuse or relay!
So what should I do?
Check the wiring, electrical connectors, for a damaged component, blown fuse or dicky relay!
That seems far too much like hard work what can I do to make it easier?
Start with the easiest bit first!
So i could check the fuse first?
Yup simples!

May I just say you are a Fiat Ninja Sir
Checked the fuses and yep, blown blue 15 Amp F11 as stated. Replaced it and cleared the fault codes and car is now running rather well.
Thanks again, saved a lot of trial and error at this end and i know longer hear the Engine Fault beep in my sleep

 

[philipb82]

May I just say you are a Fiat Ninja Sir
Checked the fuses and yep, blown blue 15 Amp F11 as stated. Replaced it and cleared the fault codes and car is now running rather well.
Thanks again, saved a lot of trial and error at this end and i know longer hear the Engine Fault beep in my sleep

Richydraper is da man

Phil

 

[Clivvy]

VERY awesome result!

well done Richy!

 

[MikeSalt]

Richy, you've just solved one of my queries regarding lambda sensor identification so thank you very much indeed (it's no. 14 in the diagram I need to look at). I don't actually need to know this information, but for future reference it may be useful, and you seem to be the guy to ask. I have one lambda sensor (no. 15 in diagram) for cylinders 1 and 2 and another (no. 13 in diagram) for cylinders 3 and 4 before the exhaust pipes converge into one. Would these show up as being sensor 1, banks 1 and 2 if one of these were to fail? I have a 2004 Punto HGT.

Cheers,

Mick

 

[richydraper]

hi #MikeSalt
the post cat sensors could quite possibly show up as bank 1 and bank 2 but id imagine the issue could come when looking at the post cat lambdas. if you have any designation on bank 2, as i understand it, there has to be other variables for bank 2 also. So if you have a pre cat lambda on bank 2 you would have to have a post cat lambda on bank 2, this would open up the variables for the ecu to throw cat efficiency faults for bank 2.

in OBD2 there is scope for 3 lambda sensors in each bank so i would have thought this would have been the way that fiat did it
Bank 1 Sensor 1 being cyl 1+2 Pre cat
Bank 1 Sensor 2 being cyl 3+4 Pre cat
Bank 1 Sensor 3 being Post cat.

if you want my honest advice on accurately defining which sensor is which... Unplug each in turn and see what faults you get that flag as Active/Current when each respective sensor is disconnected.

IF im correct in my thoughts then you would most likely see these
P0130 O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
P0136 O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)
P0142 O2 Sensor Circuit Malfunction (Bank 1 Sensor 3)

i hope you enjoy your fleeting moments in the Stilo section ... traitor!!

 

[Charlieboy13]

I had an engine failure come up and evap code about 6 months ago on my 1.4 16v punto. There is no workshop manual for my model so had a nightmare. I've tried everything from changing lambdas, wiring, bad connections, all sorts!

I have just stumbled on this post from a Google search. And thought I'd just have a look at the f11 fuse you mentioned and it was missing!

I've just replaced it, cleared the error and it's worked! Thank you so much!!!!!