More B-Max fuse fun - fuel pump short - Ford B-Max Forum
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post #1 of 5 (permalink) Old 14th November 2018, 09:15 Thread Starter
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Join Date: Mar 2014
Location: United Kingdom
Posts: 13
More B-Max fuse fun - fuel pump short

I'm still waiting for my fuse puller thingy, so no progress on the HFS problem. However, proving that problems don't come singly.....

My daughter was driving the car (2013 B-Max 1.0 litre 125PS Titanium - manual/petrol - 38k miles) last Wednesday afternoon, when the dreaded orange spanner appeared and the engine just cut out. She called me, and then rang Green Flag, who turned up promptly and plugged in their magic diagnostic screen. Three problems were revealed:-

P0087 Fuel Rail/System Pressure - Too Low. Signal Compare Failure.
P0101 Mass Or Volume Air Flow Circuit Range/Performance - No Signal
P053F Cold Start Fuel Pressure Performance. Signal Amplitude Less Than Minimum.

So, clearly a fuel issue of some sort. Mr Green Flag went to the engine compartment fuse box, and checked Fuse 34 (Fuel pump relay, diesel fuel heater) which had blown. He replaced the 20A fuse, and the engine started. So he gave me a couple of spare 20A fuses, and I set off to drive the three miles back to my home.

Sadly, after 2 miles the orange spanner appeared again, and once again the engine died. I replaced the fuse again, but with no joy - the engine wouldn't start and the fuse blew immediately. Fortunately, my local (non-franchise) garage was just around the corner, so the car was towed to their workshop.

They have had the car for a week now, and have not yet identified the problem - although they have told me that the fuel pump is not faulty.

So, has anyone had a similar B-Max experience? Or does anyone have any suggestions as to which areas to investigate?

Many thanks for your wise words,


Davidsb is offline  
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post #2 of 5 (permalink) Old 18th November 2018, 09:23 Thread Starter
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Join Date: Mar 2014
Location: United Kingdom
Posts: 13
Problem resolved - the issue was a corroded section of the wiring loom causing an electrical short..

My local garage diagnosed the problem, replaced the damaged section and presented me with a very modest invoice for their efforts.

Davidsb is offline  
post #3 of 5 (permalink) Old 18th November 2018, 10:11
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Location: Torfaen
Posts: 543
Thanks for letting us know.
So many people post a problem here but do not let us know the outcome.
Thanks again.


Titanium X Tectonic Silver 1.0 125ps Eco.
Hywel S Wales is offline  
post #4 of 5 (permalink) Old 9th December 2018, 11:33
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Join Date: Dec 2018
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Hi. I think I'm having the same problem as davidsb. Was wondering where the corroded part of wire loom was located.
Stevet is offline  
post #5 of 5 (permalink) Old 18th March 2019, 22:51
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Join Date: Mar 2019
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Could you tell me where the corroded wire loom was located please?
SandieW is offline  

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