i am receiving an error code 542 Fuel pump secondary circuit failure: PCM to ground. my truck is a 1990 ford super duty rollback wrecker. i have replaced the in tank fuel pump, checked the fuel pump relay (i switched this one with the one in my 1991- the one out of the super duty works fine in the 1991 f250). the error reads "Fuel pump secondary circuit failure: PCM to ground" what else should i try?
May 5, 2008 at 12:56 PM