P1185 Possible Causes
- Faulty Fuel pressure regulator valve (Stuck Open)
- Faulty Rail pressure sensor
- Rail pressure sensor harness is open or shorted
- Rail pressure sensor circuit poor electrical connection
First diagnose P1185 code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
Cost of diagnosing the P1185 code
Labor: 1.0The cost of diagnosing the P1185 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
P1185 Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1185 MeaningAs inputted rail pressure sensor signal, Engine Control Module (ECM) of Common rail diesel engine controls Fuel pressure regulator valve(integrated with high press. pump) in order to maintain optimum rail pressure according to current engine rpm and load.
However when the problem that leads rail pressure to out of target value intended by ECM occurs due to mechanical or electronical reason, ECM shuts engine down and sets Diagnostic Trouble Code (DTC) by limiting fuel (stops injector operation) in order to prevent engine from being controlled abnormally. "rail pressure monitoring error" is the DTC which diagnose 1).supplying state of low pressure fuel and 2).mechanical operating conditions of high pressure pump and 3) indirectly based on RPS output voltage and RPS duty. thus, repair relevant to this DTC requires mechanics the total understand of fuel system.
P1185 More InformationNeed more information on how to fix the P1185 code?
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P1185 Information for specific makes
- P1185 AUDI Linear Oxygen Sensor Common Ground Short To Ground
- P1185 BUICK Engine Oil Temperature Sensor Circuit
- P1185 CADILLAC Engine Oil Temperature Sensor Circuit
- P1185 CHEVROLET Engine Oil Temperature Sensor Circuit
- P1185 FORD FTS High Fuel Pump Temperature Sensor High
- P1185 GMC Engine Oil Temperature Sensor Circuit
- P1185 HYUNDAI Fuel Pressure Monitoring-Maximum Pressure Exceeded
- P1185 VOLKSWAGEN Linear Oxygen Sensor Common Ground Short To Ground