trouble codes

[ban-one]

i just had my gt scanned at advance auto parts today with the scanner tool they have for the emissions, and it gave me the following codes.....

p1504..manf cntrl vehicle speed... idle speed control.... auxiliary inputs

p1409..manufacturer control .. auxiliary emission controls.

each one repeats twice then it had dtc pending codes

p0193..fuel rail pressure sensor ..circuit high input wich also repeats itsself

i put a new idle air control valve today and the idle stays right at 2000 no matter what..anyone know what could be causing the high idle and the trouble codes.. i checked all the vacumn lines and there all on and not broken and cleaned the kn filter and the mass air flow sensor. this all came about a week ago,after i stupidly washed my motor at the car wash and its been a disaster ever sense. any help would be great.

 

[Mike97gt]

Moved to tech.. I will get back to this with advice later when I have time.

 

[ban-one]

thanks svttech i hear u always have the right answers so ill check back.

 

[Mike97gt]

Ok sorry it took me so long to get back. Me and wife were watching a movie

Well the p0193 code is

P0193 - Fuel Rail Pressure Sensor Circuit High Input (FRP) The comprehensive component monitor (CCM) monitors the FRP sensor circuit to the PCM for high voltage. If voltage were to fall below a calibrated limit and a calibrated amount of time during testing, the test will fail. FRP signal shorted to VREF or VPWR.
FRP signal open (gasoline only)
Low fuel pressure (NG only)
Damaged FRP sensor.
Damaged PCM.
High fuel pressure (caused by damaged fuel pressure regulator) NG.
A FRP PID value during KOER or KOEO less than 0.3 volts for gasoline or 0.5 volts for natural gas vehicles (NG) would indicate a hard fault.

this is most likely caused by water getting into the FPR when you washed the engine. first thing I would do is check the electrical connector, see if there is water in the plug. IF there is water blow it out with compressed air and retest.


P1409 is

P1409 - EGR Vacuum Regulator Solenoid Circuit Malfunction This test checks the electrical function of the EGRVR solenoid. The test fails when the EGRVR circuit voltage is either too high or too low when compared to the expected voltage range. The EGR system must be enabled for the test to be completed. EGRVR circuit open
VPWR open to EGRVR solenoid
EGRVR circuit short to VPWR or GND
Damaged EGRVR solenoid
Damaged PCM
The EGR vacuum regulator solenoid resistance is from 26 to 40 ohms.

same as above I think water got into the connector or into the part itself first test the connector then replace the part if that don't work.

p1504 is

P1504 - Idle Air Control (IAC) Circuit Malfunction This DTC is set when the PCM detects an electrical load failure on the IAC output circuit. IAC circuit open
VPWR to IAC solenoid open
IAC circuit short to PWR
IAC circuit short to GND
Damaged IAC valve
Damaged PCM
The IAC solenoid resistance is from 6 to 13 ohms.
IAC valve stuck open
Vacuum leaks
Failed EVAP system
Damaged PCM
The IAC solenoid resistance is from 6 to 13 ohms

Same as above, since you already replaced it I bet you high idle is due to the FPR problem. I doubt a vac leak would cause you idle concern because if you had a vac leak that large you would have p0171 and p0174 lean bank 1+2 codes.

 

[ban-one]

ok bought a fuel rail pressure sensor today from ford 80 bucks.. installed it now the gt runs alot better but still has a slight high idle at about 1500 rpm but it goes down after a min or so.my egr valve dont have any eletrical connectors on it so how could that be throwing a high circuit from the odb code reader? or should i just change it anyways?... allready changed the iac.. tps.. and frps..cleaned all cops and injector plugs what next?

 

[SilverBullet00]

Im having the same problem bro, except mine idles high (1100 rpm) and surges to 2000rpm when Im coming to a stop or pushing in the clutch. BUT Im not throwing any codes.... I know its frustrating.

 

[ban-one]

yea same here if im driving and shift the rps go fine when i come to a stop or at an idle after a stop is when they go to around 1000-1400 and i fixed all the stuff thatw as throwing codes? hopefully it just goes away.

 

[Mike97gt]

it's not on the EGR itself..

the egr system on our cars is a delta feedback system and it has 4 parts.

EGR tube, EGR valve, DPFE sensor ( delta presure feedback Egr) and a EGR vacumm regulator more commonly called the EVR.

the code you have is for a circuit fault to do with the EVR. the EVR looks like a little spaceship it has a electrical connector and a two port vacumm line pluged into it. and is located on the intake manilofd in the drivers side rear. it's mounted near the fuel rail on a bracket just to the right rear of the intake plenum.

 

[ban-one]

now i was wondering what that was, it has the black cap that turns on the top, looks like a circle and there is another connector behind it with 2 vacumn ports in it also what is that? i cleaned them both yesterday. i cleaned it and stuff, what would i call it if i was to order it? is it a ford only part or can i get it from a regular auto parts store.

 

[Mike97gt]

I would get it from ford. it's called a EVR

 

[TIGERSNAKE]

ODB II CODE HELP!

I have a 98 Cobra with Flowmasters and a Bassini X pipe with MIL eliminators. I have the following codes. Can anyone tell me what I need to replace or do to correct the problem.

P1516 Intake Manifold Runner Control Input Error.

P1131 Lack of Upstream Heated Oxygen Sensor Switch-sensor Indicates Lean-Bank No 1

P1130 Lack of Upstream Heated Oxygen Sensor Switch-Adaptive Fuel Limit-Bank No 1

P0420 Catalyst System Effeciency below limit-Bank No 1