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Parking assist malfunction - service required


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8 replies to this topic

#1 Northy

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Posted 15 December 2020 - 12:04 PM

Drove to the shops on Saturday morning, all fine. When I started the car (Focus Titanium 1.6 diesel) up again I got this message about the parking assist. Everything else works on the car, drives ok, windscreen wipers work. Windows work as do the headlamps, radio etc.

I wiped the sensors down with a cloth and also gave a blast with WD40 as I'd heard this may help if there's moisture in the sensor but no change unfortunately. Is this a relatively simple thing to track down as I spoke to the Ford dealership I bought it from and they want £95 to do a diagnostic check.

 

Thanks in advance for any advice offered.



#2 Squirt

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Posted 15 December 2020 - 08:58 PM

It can usually be down to a sensor or a wiring issue, that’s 90% of the time. I’ve replaced a couple of modules also.
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#3 Northy

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Posted 17 December 2020 - 01:24 PM

Thanks for your reply Squirt. Are the rear sensors easy enough to get access to?



#4 mberry77

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Posted 04 February 2021 - 07:29 AM

Hi. I have this problem too on my Titanium X and get malfunction message. The park assist function no longer works and neither do any of the front or rear parking sensors. I have scanned for errors and get B1B40.

Any ideas? Does a single faulty sensor knock out all of the sensors?

Did you get your issue fixed northy?

Edited by mberry77, 04 February 2021 - 07:34 AM.


#5 Northy

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Posted 11 April 2021 - 09:00 AM

Sorry for the late reply mberry77.

In a word, no. I put some WD40 over the sensors and they worked for about 5mins then stopped working again. That was a while ago now, I decided to check the boot area out just to see if there was anything blindingly obvious (wishful thinking!) only to discover about an inch and half of water in the spare tyre bay. Cleared that out and now find there is water in the rear passenger footwells. Pressing the nad on the carpet pushes about an inch of water up. So more fun there. I'm wondering if this water intrusion could be the cause of the rear sensor not working? Perhaps there's a connection hub around that area where the water is that's now got into the system. Odd thing is there's no sign of where the water is coming from as none of the carpet on the inside of the boot is wet.



#6 TreborB

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Posted 11 April 2021 - 10:05 AM

Water leaks to rear quite a well known problem. Here is one of the best threads on water leaks

Not sure if all photo's are still showing

https://www.fordowne...-leak/#comments


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#7 Northy

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Posted 11 April 2021 - 04:10 PM

Thanks for the link, I'll be having a look in these areas once the weather warms up. Hopefully find the cause of the sensor failure too.



#8 mberry77

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Posted 21 April 2021 - 08:58 PM

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Following my post earlier this year, I changed the sensor and it made no difference, i checked for connections and module in boot and all seemed ok and nothing unusual. 

 

Then when the weather got better in march it started working properly and not had any issues since. 

 

I can only think mine was water somewhere or a bad connection.


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#9 Northy

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Posted 26 April 2021 - 03:49 PM

Following my post earlier this year, I changed the sensor and it made no difference, i checked for connections and module in boot and all seemed ok and nothing unusual. 

 

Then when the weather got better in march it started working properly and not had any issues since. 

 

I can only think mine was water somewhere or a bad connection.

It seems to be a water related issue, I started mine up the other day after a dry spell and the sensors started working again. This lasted for a couple of hours before failing again. I think the next dry spell I'll be pulling the carpets up and making sure I get the insulation dried out.






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