Join Now
International Automotive Technicians Network

P1284 Diagnostic Trouble Code Discussion for October 2007

Air Fuel Sensor (Bank 2 Sensor 1) Rich Shift Monitoring


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P1284
Help Request Posted
1999 Ford F-250 Super Duty Lariat 7.3L No Start, MIL Lamp on, Intermittant nostart VIN: 1FTNF20F3X
P1284: Injection Pressure Regulator Failure - KOER Self-Test Aborted. Truck starts and drives, intermittently will no start HOT ONLY , intermittently will run rough. aborts KOER test due to high ICP reading It is going to a "fail-safe" ICP reading even with key just on engine not running. So actuall is not available by P...
October 17, 2007
1999 Ford F-250 Super Duty Lariat 7.3L No Start, MIL Lamp on, Intermittant nostart VIN: 1FTNF20F3X
P1284: Injection Pressure Regulator Failure - KOER Self-Test Aborted. Truck starts and drives, intermittently will no start HOT ONLY , intermittently will run rough. aborts KOER test due to high ICP reading It is going to a "fail-safe" ICP reading even with key just on engine not running. So actuall is not available by P...
October 18, 2007
1999 Ford F-250 Super Duty Lariat 7.3L No Start, MIL Lamp on, Intermittant nostart VIN: 1FTNF20F3X
P1284: Injection Pressure Regulator Failure - KOER Self-Test Aborted. Truck starts and drives, intermittently will no start HOT ONLY , intermittently will run rough. aborts KOER test due to high ICP reading It is going to a "fail-safe" ICP reading even with key just on engine not running. So actuall is not available by P...
October 17, 2007
1999 Ford F-250 Super Duty Lariat 7.3L No Start, MIL Lamp on, Intermittant nostart VIN: 1FTNF20F3X
P1284: Injection Pressure Regulator Failure - KOER Self-Test Aborted. Truck starts and drives, intermittently will no start HOT ONLY , intermittently will run rough. aborts KOER test due to high ICP reading It is going to a "fail-safe" ICP reading even with key just on engine not running. So actuall is not available by P...
October 18, 2007