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Make and Model > Ford, Lincoln, Mercury > F-Series Trucks > Ford Ecoboost 3.5L no start and P00C6, P025A

Ford Ecoboost 3.5L no start and P00C6, P025A

Diagnose and fix Ford Ecoboost 3.5L no start and P00C6, P025A

Either or both of these trouble codes can cause a Ford Ecoboost 3.5L no start or start and then stall

P025A – Fuel Pump Module A Control Circuit/Open,
P00C6 – Fuel Rail Pressure Too Low – Engine Cranking.

Most common cause of Ford Ecoboost 3.5L no start and P00C6, P025A

The fuel pump relay is a common failure point.

fuel pump relay

Ford Ecoboost 4-pin fuel pump relay

Start your diagnosis with a fuse and relay check

The fuel pump fuse location varies by model year, so refer to fuse diagrams shown here. Pull the fuse and check to see if it’s blown.

The fuse in the battery junction box provides power to the fuel pump relay contacts and control coil. The control coil is grounded by the BCM after the immobilizer passes the PATS key test. The relays close and that powers the fuel pump control module.

ecoboost fuel pump module

The fuel pump relay is a common failure point. If the fuel pump fuse is good, remove the fuel pump relay and jumper across terminals 3 & 5 in the relay socket. If the engine starts and runs, check for control coil power on terminal 1. If you find battery voltage on terminal 1 in the socket, next test for BCM ground on terminal 2 in the socket. If the control coil is getting power and ground and the jumper wire results in engine start, then replace the fuel pump relay.

 

Posted on by Rick Muscoplat

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