Hi,

I recently purchased a Fiesta 1.25 on a 2011 plate with 85k miles for my son as his 1st car. Everything was ok on the test drive although I used it on a run to work and it is producing a low oil pressure prompt, the car judders and produces the message. When I retuned to the garage apparently they flushed the engine, put new plugs in and fresh oil (which I question as the plugs don’t look new). I yesterday took the car on a run and it is still producing the same message. I am conscious this seems catastrophic given the message, after researching this could be the pressure switch or oil pump. Please help?

 

Edited July 20, 2025Jul 20 by Stoney871
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Hi,

This isn't a common problem on the 1.25 engine.  

The oil pump is a major job that requires sump removal and cambelt removal for access so not financially viable on a Fiesta of this age with this engine.

When you say the engine juddered, could you hear any metallic rattling, or was it more of a fuelling type judder?  There is a chance of this being an engine wiring loom fault, affecting the oil pressure switch reading and the injection/ignition control, but there isn't any adjustment on the oil pump on these, so the switch readings cannot change the amount of pressure, meaning an electrical fault could not be reducing lubrication to cause an engine rattle.

13 hours ago, TomsFocus said:

Hi,

This isn't a common problem on the 1.25 engine.  

The oil pump is a major job that requires sump removal and cambelt removal for access so not financially viable on a Fiesta of this age with this engine.

When you say the engine juddered, could you hear any metallic rattling, or was it more of a fuelling type judder?  There is a chance of this being an engine wiring loom fault, affecting the oil pressure switch reading and the injection/ignition control, but there isn't any adjustment on the oil pump on these, so the switch readings cannot change the amount of pressure, meaning an electrical fault could not be reducing lubrication to cause an engine rattle.

I would say it was more relating to a fuelling type judder, although when I encountered this on the motorway a day after picking up the vehicle it didn’t display the message but there were momentary reductions in power while at 70mph. I think I could have been sold a dud car as I heard the 1.25 Zetec engines are bulletproof. I am currently in discussions with the car salesman to return it, I’ll see how this works out.

Give it them back, get another👍

It could just be the oil pressure switch is faulty. They are cheap enough to change, as long as it is easily accessible. I would probably get them to change the switch, and, if that doesn't work, return the car for a refund under the sale of goods act.