Technical P1325 Code

[Moonlight999]

Hi everyone, I’ve got a problem with my Ford KA mk2, as it has a Fiat based engine, I’m having a P1325 code and car misfire when hot only, changed Spark plugs, Coil packs but the problem is still there, I can’t figure out what the problem is and it’s become super stressful !

 

[rmjbn1]

Hi and welcome
Does this help?

Knock sensor | FIAT Punto Evo

Hi. I got the code showing P1325 - knock sensor. Had a new sensor fitted at the garage today but code still showing. Mechanic suggested it could be broken wire or ECU problem. It feels lumpy to drive, especially when lifting off the accelerator. Anyone had anything similar or know what needs to...

www.fiatforum.com

If diagnosing yourself scan tool that can read live data and multimeter would help. If not, a good Fiat indy should be able to find the fault

 

[Moonlight999]

Hi and welcome
Does this help?

Knock sensor | FIAT Punto Evo

Hi. I got the code showing P1325 - knock sensor. Had a new sensor fitted at the garage today but code still showing. Mechanic suggested it could be broken wire or ECU problem. It feels lumpy to drive, especially when lifting off the accelerator. Anyone had anything similar or know what needs to...

www.fiatforum.com

If diagnosing yourself scan tool that can read live data and multimeter would help. If not, a good Fiat indy should be able to find the fault

Please if you get to fix your car let me know what was the issue exactly, as I’ve changed spark plugs and coil packs on my Fiat based Ford KA MK2 1.2 but it’s still causing the problem.

 

[Mike1alike]

P1325 on the Ka Mk2 FIRE engine behaves like Fiat P0351/P0352, ignition primary circuit related.. Since plugs and coils are already ruled out and the fault only appears when hot, the likely causes sit on the same branch: crankshaft sensor, coil wiring/grounds, or a coil driver inside the ECU breaking down with heat. All three can cause identical symptoms, so it’s more about testing than guessing.

 

[Moonlight999]

P1325 on the Ka Mk2 FIRE engine behaves like Fiat P0351/P0352, ignition primary circuit related.. Since plugs and coils are already ruled out and the fault only appears when hot, the likely causes sit on the same branch: crankshaft sensor, coil wiring/grounds, or a coil driver inside the ECU breaking down with heat. All three can cause identical symptoms, so it’s more about testing than guessing.

I’ll try changing the knock sensor next thing

P1325 on the Ka Mk2 FIRE engine behaves like Fiat P0351/P0352, ignition primary circuit related.. Since plugs and coils are already ruled out and the fault only appears when hot, the likely causes sit on the same branch: crankshaft sensor, coil wiring/grounds, or a coil driver inside the ECU breaking down with heat. All three can cause identical symptoms, so it’s more about testing than guessing.

 

[Mike1alike]

Before changing the knock sensor, I’d recommend testing it first, you can easily do that.
Here's a good video about it:

 

[Mike1alike]

Testing the ECU was just covered in this thread recently:

Punto 1.2 8v P0352 - is it ECU? | FIAT Punto (Mk2/2b)

My Punto 1.2 8v 2004 engine light came on while starting warm engine in cold weather (~-20'C) with code P0352 for Coil B but engine ran normally. I resetted code and everything was fine. No code in next start with cold engine but again after warm start code came and this time engine was running...

www.fiatforum.com