esp problems light on dash

[angellonewolf]

I don't think so (but could be wrong). Have a look here, might give you somewhere to start.

Fault code C1301 on Peugeot and Citroën: Coherence between brake pedal switch and pressure sensor - ACTRONICS LTD

Trouble with the fault code C1301? Would you like to know more about this fault code? Read more>

www.actronics.co.uk

does say at the bottem it should be 0 at start but not clear where is the switch on the pedel or the abs unit that starts at 0

 

[DanZac]

I dont know about your specific vehicle but the pressure sensor will be either attached to, or more likely, be part of the ABS module.

If its part of the module its unlikely to be replaceable. If you can get a wiring diagram for the module connection you might be able to test the pressure switch?

Does the pressure on your scan data change with pedal operation or is it just stuck at 160 all the time?

 

[angellonewolf]

when the engine was started it did go up and back down to 160 ish

i cant remember what it went up to 280 @carbon can you remember

 

[willie.macleod]

I have no experience with Peugeot but I’ve been back and looked at it again, scan shows two brake switches that operate when the brake is pressed, but abs pressure is at approx 160bar without the pedal being pressed and engine off.

If the brake pressure sensor is internal then it's a pump repair/replace job. As I said before tread carefully as crooks operating in the rebuild sector.

 

[carbon]

Does the pressure on your scan data change with pedal operation or is it just stuck at 160 all the time?

Yes the pressure increases when the pedal is pressed either with the engine off or running

 

[angellonewolf]

ok update new switch fitted but made no differance would the codes need reset before its working fine again or is it that theres more wrong ?

 

[DanZac]

ok update new switch fitted but made no differance

What switch did you replace?

 

[willie.macleod]

ok update new switch fitted but made no differance would the codes need reset before its working fine again or is it that theres more wrong ?

I'm assuming it's the brake pedal switch you replaced but as your diagnostics showed both sides working I wouldn't expect that to change anything. A short test drive should be enough to put the warning light off if that was the fault. The brake pressure sensor is showing incorrect values so that is where I would be looking.

 

[carbon]

This is all the data I can get from the abs system.


Tha valve that concerned me was the pressure reported without the brake pedal pressed. I don’t have access to any data from one of these vehicles that would indicate if that value should be 0 bar or something else

 

[m_c]

The pressure should be near zero with the pedal released, however you are in the realm of, is the sensor/wiring/module faulty, or is the data list wrong?

I have seen data list values where it's been a diagnostic software issue (even on quite expensive machines!), so I'd probably be looking for a similar vehicle just to doublecheck values.

 

[angellonewolf]

sorry for late reply yes the brake pedel switch


does seam strange that now it pops up as soon as the engine is turned on before im sure it needed driving before coming on

the oiginal switch was a pergout what i was given from toyota was differant but fitted the same and had same plugs on it

 

[angellonewolf]

Ok we swaped out the 2 front wheel sencers as I'd bought them before posting this thread and that has made no difference either so I'm assuming there's only the 2 wheel Rear prob not the problem and at 170 a hub not going to be done

As we changed out the foot pedal one is there a abs sencer on the abs unit itself? Or is the sencer on the abs unit an all in one part ?

 

[octo0072000]

had a pug 807 maybe manual same light was caused by the brake light switch and same switch on the clutch pedal both need to be in sync
if auto it may have more than one switch on the brake pedal but both must work in sync

 

[angellonewolf]

I think there's only one switch on that one but have a look at some point if I get out the kitchen on Xmas day

 

[carbon]

I think both are incorporated into the same switch housing

 

[angellonewolf]

I think both are incorporated into the same switch housing

that would make sence as there are 4 connections in there in the switch

 

[willie.macleod]

Swap out the abs module. From the earliest post showing pressure sensor issues that's been the No1 suspect especially as they are a known failure item.