× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

P1235 Diagnostic Trouble Code Discussion for September 2011

High Pressure Fuel Pump Circuit Malfunction

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 P1235
Help Request Posted
2004 GMC Sierra 2500 HD 6.6L Poor Idle Quality, Misfire VIN: 1GTHK23264
P1235: Fuel Injector 5 Output Circuit Malfunction. Truck makes loud knocking noise and puffs thick black smoke. Sounds like detonation knock. Used modis to manually shut down injectors found that when injector number 2 was disabled the knocking stopped and the smoking stopped. Checked wiring at FICM and a inje...
September 02, 2011
2004 Lincoln LS 3.0L Poor Idle Quality, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1LNHM86S14
P1235: Fuel Pump Control Out-Of-Range. hello techs, i have what sounds to be bad coils, but not convinced. it will run well for several minutes , then scatter spark all over the map and primarily on #4,5,6 cylinders. #4 coil replaced already. plugs also on that bank on all 3 holes. no change. i sus...
September 08, 2011
2005 Lincoln LS Ultimate 3.9L No Start VIN: 1LNHM87175
P1235: Fuel Pump Control Out-Of-Range. And we wonder why we have grey hair!!! Hello IATN, I have a Lincoln here that is killin me. Showed up here after sitting for 6 months. Car shut down and was towed to customer's house. While home the customer removed every fuse panel cover and trim, lost some...
September 20, 2011