Low pressure Fuel pump not getting power

2006 SEAT ALTEA
142,000 MILES • 1.9L • MANUAL
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WOLF1999
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Hi, the low pressure fuel pump in my car is not getting power, the car cut out when driving and would not start again, replaced battery as battery was on way out, but car just cranks with no start, we have e checked all relays and fuses. We have had fuel pump out and tested it by connecting straight to battery and it runs, we then checked the connector to the fuel pump where everything is fine other wires and the ground to fuel pump but the live to fuel pump is only getting millivolts to it, any advice or help would be great, I am currently starting to take trim off to follow the wire from fuel pump back to dashboard to look for breaks, but if any more specific advice would be great
Apr 15, 2026 at 11:39 AM
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STRAILER
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The power to the fuel pump comes from the engine computer so it might be getting a signal due to a bad MAF or MAP sensor. Also, on the Altea fuse layout, there is a 15A “Fuel control unit” fuse in the dash panel at fuse 43, and on diesel versions there is also a 30A “Diesel injection module supply” fuse in the under-hood box at fuse 13 plus a 10A “pump relay” fuse at position 15. It can be the control relay as well, check the relay plate under the dash for relay 109 and swap in a known-good one if possible. I would check these first and then disconnected the MAF sensor and try to start it, and then disconnect the MAP sensor and try to start it next to see what happens, let me know. Also if you can upload a short video from under the hood of the engine cranking I can tell if the engine is any good or not. Ken

Apr 16, 2026 at 9:17 AM