Technical Hi i need some help with my fiat siena

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Technical Hi i need some help with my fiat siena

tavo2360

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hi all I am having problems with my 2002 fiat siena and I need help to determine what the problem could be. My problem is I can start the car it will run and accelerate normally and it has and excellent idle. but it only works while engine is cold as soon as the engine reaches correct operating temperature it will stall as soon as you touch the accelerator when it fails the car pc deactivates the relay that controls the fuel pump and ignition coils it also gives me the following errors:
p1325
p0351
p0352
p0170
u1600
u1601
any one have any ideas? or give me any advice?
ps it is a 2002 fiat siena elx 1.6l 16v engine and a magneti marelli iaw49fb.t2 ecu
 
hi all I am having problems with my 2002 fiat siena and I need help to determine what the problem could be. My problem is I can start the car it will run and accelerate normally and it has and excellent idle. but it only works while engine is cold as soon as the engine reaches correct operating temperature it will stall as soon as you touch the accelerator when it fails the car pc deactivates the relay that controls the fuel pump and ignition coils it also gives me the following errors:
p1325
p0351
p0352
p0170
u1600
u1601
any one have any ideas? or give me any advice?
ps it is a 2002 fiat siena elx 1.6l 16v engine and a magneti marelli iaw49fb.t2 ecu


Hi, and welcome, :)

I'd check main earths,( battery to gearbox can corrode internally..!!)
then clear codes and see what happens(y)

Charlie
 
Hi, and welcome, :)

I'd check main earths,( battery to gearbox can corrode internally..!!)
then clear codes and see what happens(y)

Charlie

Hi and thanks i have already checked all earth connectios including some that are near the battery i have also checked the ones in both fuseboxes but i havent had any luck
 
Hi and thanks i have already checked all earth connectios including some that are near the battery i have also checked the ones in both fuseboxes but i havent had any luck

what are you using to get the codes?,
and what does the code explanation reveal..??, :confused:

the U's are Canbus / Body:) but I'm not going to look up ALL of them..,

MultiECUScan gives proper explanations as to the codes meaning , and it's history.. what are you seeing..??:confused:
 
what are you using to get the codes?,
and what does the code explanation reveal..??, :confused:

the U's are Canbus / Body:) but I'm not going to look up ALL of them..,

MultiECUScan gives proper explanations as to the codes meaning , and it's history.. what are you seeing..??:confused:

I am using fiat multiecuscan and it gives me these codes with the following descriptions. the failures only appear when it fails and stalls before that it has noerrors at all and it first stalls and then gives the error codes
p1325 knock sensor
p0351ignition coil1
p0352ignition coil 2
p0170 self adaptive parameters
P0230 failure in fuelpump relay
u1600 electronic key
u1601 canbus error
 
Last edited:
I'd still suspect a power supply / earth issue,
as the KEYCODE one shouldn't occur with any engine issue,

replace the main EARTH cable, battery to gearbox

do that, then start a new thread in the TECH section with your findings..

(VERY FEW people look in the Palio section..UK based forum - where the Palio was never sold..)
 
I'd still suspect a power supply / earth issue,
as the KEYCODE one shouldn't occur with any engine issue,

replace the main EARTH cable, battery to gearbox

do that, then start a new thread in the TECH section with your findings..

(VERY FEW people look in the Palio section..UK based forum - where the Palio was never sold..)

Ok thank you i have checked all earth connections and they are fine
 
aaa I have had this problem right by your battery is a black cover it has 2 bolts holding it down take it of there is 2 relays and 2 fuses it has a small ratting like 2 amp or something like that when I had the problem 1 fuse was blown and a relay didn't work I change both fuses with 10 amp and just replaced both relays
 
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