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10) For Continuous Memory Only DTC P1651: Check PSP Circuits For Intermittent z Vehicle Towed With Engine Running z Power Steering Hydraulic Concern Repaired, But DTC Not Cleared z Faulty PSP Switch/Shorting Bar Damage z SIG RTN Circuit Open z PSP Circuit Open Or Shorted To SIG RTN z Faulty Powertrain Control Module (PCM) Ensure scan tool is connected to Data Link Connector (DLC). Turn ignition switch to ON position. Using TEST H: FUEL CONTROL Diagnostic Aids Perform this test when instructed during QUICK TEST or if directed by other test procedures. Only use this test z HO2S & Sensor Connection z Fuel Injector &/Or Fuel Injector Circuits z Vacuum Systems z Harness Circuits (HO2S, HO2S GND, INJ 1-10, VPWR & SIG RTN) z Powertrain Control Module (PCM) NOTE: A break in step numbering sequence occurs at this point. Procedure skips NOTE: For additional testing information, see DIAGNOSTIC AIDS. NOTE: Continuous Memory DTC P1651 can be set if vehicle is towed while engine NOTE: After each service or repair procedure has been completed, reconnect all
2003 Ford Pickup F150 2003 ENGINE PERFORMANCE Self-Diagnostics - CNG, Flex-Fuel & Gasoline
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