P0193 And P0172

[Ryanh19]

Hello,
I have these codes on my 2000 3.8 and I don't know what to do. For the P0193 code I have replaced the fuel rail pressure sensor and have checked the wiring. It is getting 5 volts. I'm not sure what else it could be

Thanks

 

[rattlecan96gt]

when you turn the key all the way on do you hear the fuel pump kick on before you try to start it ?

 

[Ryanh19]

when you turn the key all the way on do you hear the fuel pump kick on before you try to start it ?

Yes I do

 

[rattlecan96gt]

hmm ill do some research and see if I can find anything until then try posting this in the tech section you should be able to get the attention of someone with more experience

 

[Ryanh19]

hmm ill do some research and see if I can find anything until then try posting this in the tech section you should be able to get the attention of someone with more experience

Awesome! Thanks I appreciate it!

 

[rattlecan96gt]

No problem , welcome to StangNet!

 

[wmburns]

Are you POSITIVE that the fuel rail pressure sensor intake vacuum reference line is connected, open, and leak free?

What have you done to rule out a problem with the FRPS signal return line back to the PCM? Have you checked the FRPS signal return line for shorts to ground or shorts to VPWR?

>
P0172 - System to Rich (Bank 1)
Air Measurement System

• MAF sensor (contaminated, damaged, malfunctioning, etc.)

Fuel System

• Fuel pressure regulator (leaking, malfunctioning, etc.).
• Fuel filter plugged, dirty.
• Fuel pump (weak, check valve leaking, etc.).
• Leaking/contaminated fuel injectors.
• Low fuel pressure or running out of fuel.
• EVAP canister purge valve leaking (when canister is "clean").
• Fuel supply line restricted.
• Fuel rail pressure sensor (incorrect reading).

Air Induction System

• Air leaks after the MAF.
• Vacuum Leaks.
• PCV system (leak, valve stuck open, etc.)
• Improperly seated engine oil dipstick.

Exhaust System

• Exhaust leaks before or near the HO2Ss (exhaust manifold gasket, mating gaskets, etc.).

EGR System

• EGR valve tube/gasket leak
• EVR solenoid vacuum leak

Secondary Air Injection

• Damaged/malfunctioning secondary air injection system (mechanically stuck valve).

P0193 - Fuel Rail Pressure Sensor Circuit High Input (FRP)

• FRP signal shorted to VREF or VPWR.
• FRP signal open (gasoline only)
• Low fuel pressure (NG only)
• Damaged FRP sensor.
• Damaged PCM.