Fuel Pressure Regulators
Fuel Pressure Regulators (FPR) maintain the correct pressure in the fuel rail for proper injector fuel delivery. The FPR is controlled either electronically via the vehicle’s onboard computer (Powertrain Control Module (PCM) or Engine Control Unit (ECU), or through vacuum. Both control methods regulate the correct fuel pressure needed in the fuel rail system, which will vary depending on engine RPM and load.
Common causes of Fuel Pressure Regulator failure:
• Wear and tear
• Component failure
• Fuel line leak
• Clogged with deposits or debris
• Low grade fuel (can rust and corrode the fuel system)
• Vacuum line failure
Symptoms of failing Fuel Pressure Regulator may include:
• Poor starting
• Engine surging
• No start conditions
• Black smoke emitting from tailpipe
• Deceleration issues
• Check Engine Light on
The following OBD II error codes are the most commonly found with this product type. In an effort to reduce vehicle emissions, the Environmental Protection Agency (EPA), mandated that all vehicles manufactured after 1996 would be equipped with OBD II (On Board Diagnostics 2) technology. OBD II is now the standard in diagnosing vehicle emissions, which was implemented by all automotive manufacturers in 1996. The codes listed for this product type are common instances that may relate to your vehicle and should be used as a guide only. Walker Products will not be held responsible for any use of this information. It is highly suggested that you consult with a professionally trained mechanic prior to any automotive repair, and that you follow all vehicle manufacturer and EPA guidelines for removal, replacement, diagnostics, OBD II code clearing, ECU, and PCM relearn procedures.
o P0089 Fuel Pressure Regulator 1 Performance
o P0090 Fuel Pressure Regulator 1 Control Circuit/Open
o P0091 Fuel Pressure Regulator 1 Control Circuit Low
o P0092 Fuel Pressure Regulator 1 Control Circuit High
o P009B Fuel Pressure Relief Control Circuit/Open
o P009C Fuel Pressure Relief Control Circuit Low
o P009D Fuel Pressure Relief Control Circuit High
o P009E Fuel Pressure Relief Control Performance/Stuck Off
o P009F Fuel Pressure Relief Control Stuck On
o P00BA Low Fuel Pressure – Forced Limited Power
o P018A Fuel Pressure Sensor “B” Circuit
o P018B Fuel Pressure Sensor “B” Circuit Range/Performance
o P018C Fuel Pressure Sensor “B” Circuit Low
o P018D Fuel Pressure Sensor “B” Circuit High
o P018E Fuel Pressure Sensor “B” Circuit Intermittent/Erratic
o P20DD Exhaust Aftertreatment Fuel Pressure Sensor Circuit
o P20DE Exhaust Aftertreatment Fuel Pressure Sensor Circuit
o P20DF Exhaust Aftertreatment Fuel Pressure Sensor Circuit Low
o P20E0 Exhaust Aftertreatment Fuel Pressure Sensor Circuit High
o P20E1 Exhaust Aftertreatment Fuel Pressure Sensor Circuit
o P228A Fuel Pressure Regulator 1 – Forced Engine Shutdown
o P228B Fuel Pressure Regulator 2 – Forced Engine Shutdown
o P228C Fuel Pressure Regulator 1 Exceeded Control Limits – Pressure Too
o P228D Fuel Pressure Regulator 1 Exceeded Control Limits – Pressure Too
o P228E Fuel Pressure Regulator 1 Exceeded Learning Limits – Too Low
o P228F Fuel Pressure Regulator 1 Exceeded Learning Limits – Too High
o P2293 Fuel Pressure Regulator 2 Performance
o P2294 Fuel Pressure Regulator 2 Control Circuit/Open
o P2295 Fuel Pressure Regulator 2 Control Circuit Low
o P2296 Fuel Pressure Regulator 2 Control Circuit High
o P229A Fuel Pressure Regulator 2 Exceeded Control Limits – Pressure Too
o P229B Fuel Pressure Regulator 2 Exceeded Control Limits – Pressure Too
o P229C Fuel Pressure Regulator 2 Exceeded Learning Limits – Too Low
o P229D Fuel Pressure Regulator 2 Exceeded Learning Limits – Too High