Peugeot 308 SW (2017) ABS/ESP faults

[dram773]

Hi all,

VIN: VF3**************[VIN obfuscated, can be read by forum staff]

Just received the new diagnostic interface with Diagbox 9.186 from EasyDiagnostics (with thanks to Marc and Jim for arranging the FCF discount), following an impressive display of warning lights relating to ABS, ESP, tyre pressures, parking brake etc.

For the ESP90 ABS/ESP I get:
C154500 ESP dynamic braking situation detected
C003162 front left wheel speed sensor
C003462 front right wheel speed sensor

Does this imply I just need to replace the wheel speed sensors, or is there likely to be a problem with the wiring and/or modules?

Many thanks

[RichardW]

You need to look into the live data. Is the ABS ECU seeing the speed from the sensors? If you clear the codes do they come right back before the car is moved? What data is attached to the fault codes? Has anything else been done recently?

[dram773]

Hi Richard,
Many thanks for your prompt reply.
I haven't tried moving the car, but the codes came right back after I cleared them.
Nothing done recently. The warnings first came on when wife was driving into supermarket car park. They came on again when she turned on ignition to drive home and have stayed on since.
I'll have to look up how to get live data and data attached to fault codes - I've not used Diagbox before.
Thanks again.

[RichardW]

Run the global scan then click on the ECU which will give a preview of the fault codes, there's a + box at the LHS of each code that if you click it will give the info recorded at the time of the fault. More may be available if you go into the ECU, then read fault codes, and then open up each fault. Similarly from within the ECU you can click on Standard parameters and this will give the available live data. It seems unlikely that both front sensors went down at the same time, but a wiring fault could be pulling the reference voltage down or something; or you could be looking at an internal ECU fault....

[dram773]

Hi,
I've run the global scan.
For C0031 62 Front Left Wheel Speed sensor, the list of associated variables shows "invalid value" for the front right wheel speed. Control unit supply voltage 14.4 volt.
For C0034 62 Front right wheel speed sensor, the list shows "invalid value" for all 4 wheels. Control unit supply voltage 0 volt.
I can send the saved pdf of the scan if that would help?
Many thanks

[Paul-R]

Turn the PDF into a JPG and post directly to the site.

[GiveMeABreak]

@dram773: No, just take a screenshot and upload relevant images to the forum directly if you want to:

Instructions:

1) Use Full Editor & Preview Button	2) Click Attachments Button
Click Add Button to Browse PC or Phone for Images and Upload	Click Place to put the Images in Your Post

[dram773]

Here screenshots attached.
Many thanks

[RichardW]

Next you want to clear the faults, and then see which comes back. Possibly the RH sensor has thrown in the towel and caused the others to go haywire.

[dram773]

Thank you RichardW
I cleared the faults once (I believe) but they came straight back on the next scan.
I'll try again tomorrow.
Is it likely to be just the RH sensor (fingers crossed), or could it be a wiring/ecu failure?
As I'm sure you've gathered, this diagnostic stuff is all new to me. And I thought 1970s Lotus, TVRs, etc. were temperamental ....
Have a good weekend and grateful thanks to all who have helped.
Kind regards
Ashley

[RichardW]

Surprised they came straight back as they are showing intermittent. Sometimes you need to shut the power off for a few seconds then re-scan.

[dram773]

Good morning RichardW,

I'll try a re-scan later - when (hopefully) it stops raining.
Is it worth me doing a BSI reset first?

The last scan also showed faults in the power steering (U1213, C1406, C1638) which I could not clear, owing to a Diagbox communication error. I'll post this as a separate topic but mention it here in case it has any bearing on the ABS/ESP issue.

Kind regards
A.

[dram773]

Good morning all,

I'm new to using Diagbox, so please be gentle. I've encountered an error that prevents me from deleting faults and which helpful Jim (EasyDiagnostics) can't explain.
The instructions for several faults involve switching the ignition off and on twice in succession. Every time I try this, Diagbox returns "The system has detected an error in communication between the diagnostic tool and the machine". Move on to another fault code that does not involve the ignition switching and it deletes ok, so it doesn't seem to be a problem with the interface or socket.
Has anyone else experienced this? Did you manage to delete any of these faults?

Many thanks

[GiveMeABreak]

You haven't stated what the faults are, so it depends what the fault is. If the underlying cause is still there - i.e. a permanent fault, then of course you aren't going to be able to magically clear it as it will just pop backup again. Of course trying to clear them initially is the correct thing to do, but if they won't clear or return immediately, then it means the fault remains and on a specific system like the ESP, it doesn't require driving specifically for the fault to reappear, unlike an engine air or fuelling fault for example, that may take a while to present itself.

There's clear indication that at your front right sensor is not getting any power - so without that can't send any data back to the ESP ECU. Whether the sensor itself is faulty or the supply to it is what needs looking at and certainly I would be checking the connection plug at the ESP ECU to see if that has been removed and not put back on properly. Has any work been done on the vehicle lately - brakes or wheels or anything else in that area?

[GiveMeABreak]

I've merged your other thread with this one as you can see how it can cause duplication. Please keep everything related in this thread.

So as I can now see your codes above, this is one example where you can't just clear the faults if the cause of the problem is still there - in this case either a faulty ABS sensor or the supply from / to it, or the ESP ECU. These self-test and will throw a code up immediately if there's a problem as the wheel speed sensors are used for so many functions.