PO191 for Escape Hybrid
#1
12-20-2010, 05:46 PM
#2
12-20-2010, 08:42 PM
Hotshot
The PCED for your specific vehicle says:
FWIW, it's my opinion that the diagnostic steps that follow are beyond the scope of a forum such as this and would need to be performed by a technician trained in diagnosing electronics problems who also has an appropriate scan tool.
If you want to hang a part on the car and see if you get lucky, replace the FRP sensor. Otherwise, take it to a Ford-trained tech for diagnosis.
P0191 - Fuel Rail Pressure (FRP) Sensor Circuit Performance
Description: The comprehensive component monitor (CCM) checks the FRP for acceptable fuel pressure. The test fails when the fuel pressure falls below or exceeds a minimum/maximum calibrated value for a calibrated period of time.
Possible Causes: High fuel pressure.
Low fuel pressure.
Damaged FRP sensor.
Excessive resistance in the circuit.
Low or no fuel.
Diagnostic Aids: The FRP PID value during KOER should be between 275 kPa (40 psi) and 485 kPa (70 psi).
GO to Pinpoint Test DD .
Description: The comprehensive component monitor (CCM) checks the FRP for acceptable fuel pressure. The test fails when the fuel pressure falls below or exceeds a minimum/maximum calibrated value for a calibrated period of time.
Possible Causes: High fuel pressure.
Low fuel pressure.
Damaged FRP sensor.
Excessive resistance in the circuit.
Low or no fuel.
Diagnostic Aids: The FRP PID value during KOER should be between 275 kPa (40 psi) and 485 kPa (70 psi).
GO to Pinpoint Test DD .
If you want to hang a part on the car and see if you get lucky, replace the FRP sensor. Otherwise, take it to a Ford-trained tech for diagnosis.
#3
12-21-2010, 02:29 PM
#4
12-21-2010, 07:47 PM
Fleet Mechanic
Not really. What if you put both parts on and that didnt fix it then take it to a shop and all that is wrong is a broken wire in the harness by the PCM. You are out the 220 plus whatever cost to fix it. Take it to a dealer that has worked on hybrids. Not every one has experience with them.
On a side note, I'm glad you didn't say anything about a "thrown" code. It seems like everyone here get codes thrown at them daily.
On a side note, I'm glad you didn't say anything about a "thrown" code. It seems like everyone here get codes thrown at them daily.
#5
12-21-2010, 08:02 PM
Hotshot
#6
12-22-2010, 10:46 AM
Several posts in the F150 section mentioned the FPDM as a culprit for PO191 - one post even replaced it with success. In digging deeper, some mentioned replacing the fuel filter too. That would be a cheaper fix and one I should do anyway as part of maintenance on a 100k+ vehicle. I'll start there.
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RollingStone
Escape & Escape Hybrid
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