fuel pump circuit open on KOER test

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03-02-2007, 01:35 AM

jonboy

Thread Starter

Join Date: Mar 2007

Posts: 10

fuel pump circuit open on KOER test

Ok KOEO test passes but after car warms about 10-15 minutes it dies. Only code i get is i believe 542 and 543 Which are: fuel pump circuit open battery to pcm: fuel pump circuit open pcm to motor. Any ideas on what the problem is or how tho fix?

03-02-2007, 02:39 AM

94ford5liter

4th Gear Member

Join Date: May 2005

Location: California

Posts: 1,259

RE: fuel pump circuit open on KOER test

probably a bad ground or check your fuses

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