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Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 35843
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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2009 Ford F150 4.6. It will intermittently turn over but

Customer Question

2009 Ford F150 4.6. It will intermittently turn over but will not crank. Shows code p0690. When It decides not to run the starter will stay engaged. Has good fuel pressure. Battery Tests good. I also cleaned battery terminals.
Submitted: 1 year ago.
Category: Ford
Expert:  Ron replied 1 year ago.

Hello and thank you for your question,

The Code P0690 suggests that the PCM (computer) is detecting low voltage from the fuel pump relay . This problem can be cause by any of the following,

  • Fuel Pump Relay
  • Fuel Pump Relay Wiring
  • Fuse

    In order to determine the cause you are going to need to do some testing. I have enclosed the steps in the link below. Copy and paste the link to your browser to open and view them.