M

mcbrl

Member

• Feb 11, 2025

• #1

Hello,

Disco 2 2004 V8 - car runs fine, no problem. Starts on first crank - even after one week being off.

But Nanocom shows me this error. Erased it and it comes back up.

-> P1231 - Fuel pump relay fault Drive cycle A:Signal out of range - below minimum

I would like to sort this out before it gets me stranded.

Any tips on what to check / look for?

Thanks!

 

Last edited: Feb 11, 2025

Keith_L

Well-Known Member

• Feb 11, 2025

• #2

There's no error showing in your post.

 

M

mcbrl

Member

• Feb 11, 2025

• #3

Sorry, I kept it in the title only:

P1231 - Fuel pump relay fault Drive cycle A:Signal out of range - below minimum

I will update the post also

 

sierrafery

Well-Known Member

• Feb 11, 2025

• #4

Hi. swap R1(pump) with R3(headlamp wash) or with a new one and see after that, if no change there is a weak contact on that relay's circuit

 

M

mcbrl

Member

• Feb 11, 2025

• #5

Thanks - these relays are under the bonnet correct?

 

sierrafery

Well-Known Member

• Feb 11, 2025

• #6

mcbrl said:

Thanks - these relays are under the bonnet correct?

Click to expand...

Yes

 

M

mcbrl

Member

• Feb 14, 2025

• #7

sierrafery said:

Hi. swap R1(pump) with R3(headlamp wash) or with a new one and see after that, if no change there is a weak contact on that relay's circuit

Click to expand...

Yep! That was it! Error gone and not coming back

Cheers! Thanks!