Question about 2001 Mazda Tribute

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What does vpwr stand for in a ford egr circuit

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  • larry gilman Feb 22, 2012

    code1409 pd relaced egr regulator and dpfe cleaned egr valve and still get same codeafter clearing

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  • Mazda Master
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Vehicle power. You should have 12 volts to that pin/wire with the key on.

Posted on Feb 22, 2012

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2003 ford focus 2.3 litre DTC P2004 intake manifold runner control stuck open. What does it mean when it says shorted to VREF or signal circuit shorted open or shorted to VPWR.


code p 2004 refers to intake manifold air control actuator bank 1--actuator stuck open===causes --wiring--intake manifold air control actuator---mechanical fault
it also refers to intake manifold air control solenoid bank 1--solenoid stuck open=== causes --wiring---intake manifold air control solenoid---mechanical fault
reference auto data technical fault codes
I cannot find reference to the VREF or VPWR as they may be referenced in a ford workshop manual so you may have to ask a ford service person what they stand for but I suspect that they will come back to the same thing as listed in the causes

Feb 19, 2016 | Ford Cars & Trucks

1 Answer

P1409


DTC P1409: MEASURE RESISTANCE ACROSS EGR VACUUM REGULATOR SOLENOID
Diagnostic Trouble Code (DTC) P1409 indicates that Self-Test has detected an electrical fault in the EVR circuit.

Possible causes:

Open EVR circuit.
Open VPWR circuit to EGR Vacuum Regulator solenoid.
EVR circuit shorted to VPWR.
EVR circuit shorted to GND.
Damaged EGR Vacuum Regulator solenoid.
Damaged PCM.
Key off.
Disconnect EGR Vacuum Regulator solenoid.
Measure EGR Vacuum Regulator solenoid resistance.
Is solenoid resistance between 26 and 40 ohms?
Yes No
The EGR Vacuum Regulator solenoid resistance is within specification. GO to HE111 . REPLACE EGR Vacuum Regulator solenoid. RECONNECT all components. COMPLETE PCM Reset to clear DTCs. RERUN Quick Test.

HE111 CHECK VPWR CIRCUIT VOLTAGE AT EGR VACUUM REGULATOR SOLENOID
Key on, engine off.
EGR Vacuum Regulator solenoid disconnected.
Measure voltage between VPWR circuit at the EGR Vacuum Regulator solenoid vehicle harness connector and chassis GND.
Is voltage greater than 10.5 volts?
Yes No
GO to HE112 . SERVICE open in VPWR circuit to EGR Vacuum Regulator solenoid. RECONNECT all components. COMPLETE PCM Reset to clear DTCs. RERUN Quick Test.

HE112 CHECK EVR CIRCUIT RESISTANCE
Key off.
EGR Vacuum Regulator solenoid disconnected.
Disconnect PCM. Inspect for damaged or pushed out pins, corrosion, loose wires. Service as necessary.
Install breakout box and leave PCM disconnected.
Measure resistance between Test Pin 47 (EVR) and EVR circuit at the EGR Vacuum Regulator solenoid vehicle harness connector.
Is resistance less than 5.0 ohms?
Yes No
GO to HE113 . SERVICE open in EVR circuit. RECONNECT all components. RERUN Quick Test.

HE113 CHECK EVR CIRCUIT FOR SHORTS TO POWER OR GROUND
Key off.
EGR Vacuum Regulator solenoid disconnected.
Breakout box installed, leave PCM disconnected.
Measure resistance between Test Pin 47 (EVR) and Test Pins 71 and 97 (VPWR) at the breakout box.
Measure resistance between Test Pin 47 (EVR) and Test Pins 24 and 103 (PWR GND) at the breakout box.
Is each resistance greater than 10,000 ohms?
Yes No
REPLACE damaged PCM. RECONNECT all components. RERUN Quick Test. SERVICE EVR circuit for short to VPWR or PWR GND. RECONNECT all components. RERUN Quick Test.

HE120 CONTINUOUS MEMORY DTC P1409: WIGGLE EGR VACUUM REGULATOR SOLENOID WHILE MONITORING VPWR
Continuous Memory DTC P1409 indicates that Continuous Memory Self-Test has detected an electrical malfunction in the EGR Vacuum Regulator solenoid sometime during vehicle operation.

Note: If DTC P1409 was output in Key On Engine Off (KOEO) or Key On Engine Running (KOER) Self-Test, go to HE110 to diagnose present fault.

Possible causes:

Open EVR circuit.
Open VPWR circuit to EGR Vacuum Regulator solenoid.
EVR circuit shorted to VPWR.
EVR circuit shorted to GND.
Damaged EGR Vacuum Regulator solenoid.
Damaged PCM.
Disconnect PCM. Inspect for damaged or pushed out pins, corrosion, loose wires.
Install breakout box, leave PCM disconnected.
Measure voltage between Test Pin 47 (EVR) and Test Pins 24 (PWR GND) at the breakout box.
Key on.
Voltage must read greater than 10.5 volts. For an indication of a fault, look for this voltage to drop while performing the following:
Lightly tap on the EGR Vacuum Regulator solenoid.
Wiggle the EGR Vacuum Regulator solenoid connector.
Grasp the EGR Vacuum Regulator solenoid vehicle harness connector and wiggle wires between solenoid and PCM.
Is a fault indicated?
Yes No
ISOLATE fault and SERVICE as necessary. RECONNECT all components. RERUN Quick Test. Unable to duplicate or identify fault at this time. GO to Pinpoint Test Step Z1 with the following data: DPFEGR and EGRVR PIDs and list of possible causes.

Sep 25, 2011 | 2001 Mazda Tribute

1 Answer

I have 2002 Ford Expedition and it is running rough. had diagnostic test done and was given several codes. don't have manual to see what these codes mean. I was given 9 different codes. P0755, 1747,...


For each code there is a diagnostic testing procedure . Without doing the testing we would only be guessing as to the problem . Sounds like you know next to nothing about automobile engine management systems . Your best bet ,take it to a qualified repair shop .
P0443 - EVAP Control System Canister Purge Valve Circuit Malfunction The PCM monitors the state of the EVAP canister purge valve circuit output driver. The test fails when the signal moves outside the minimum or maximum limit for the commanded state.
  • VPWR circuit open
  • EVAP canister purge valve circuit shorted to GND
  • Damaged EVAP canister purge valve
  • EVAP canister purge valve circuit open
  • EVAP canister purge valve circuit shorted to VPWR
  • Damaged PCM
To verify normal function, monitor the EVAP canister purge valve signal PID EVAPPDC (or EVMV for electronic valve) and the signal voltage (PCM control side). With the valve closed, EVAPPDC will indicate 0 percent duty cycle (0 mA for EVMV) and the voltage approximately equal to battery voltage. When the valve is commanded fully open, EVAPPDC will indicate 100 percent duty cycle (1000mA for EVMV) and a voltage drop of 3 volts minimum is normal. Output test mode may be used to switch output ON/OFF to verify function.
P0135 - HO2S Sensor Circuit Malfunction (HO2S-11) During testing the HO2S Heaters are checked for opens/shorts and excessive current draw. The test fails when current draw exceeds a calibrated limit and/or an open or short is detected.
  • Short to VPWR in harness or HO2S.
  • Water in harness connector.
  • Open VPWR circuit.
  • Open GND circuit.
  • Low battery voltage.
  • Corrosion or poor mating terminals and wiring
  • Damaged HO2S heater.
  • Damaged PCM.
  • Wiring.
  • Damaged HO2S heater.
  • Damaged PCM.

P0155 - HO2S Sensor Circuit Malfunction (HO2S-21) See DTC P0135
P0755 * SSB, wiring, PCM SSB solenoid circuit failure SSB circuit fails to provide voltage drop across solenoid. Circuit open or shorted or PCM driver failure during on-board diagnostic. Incorrect gear selection depending on condition mode and manual lever position. See Solenoid On/Off Chart. Go To Pinpoint Test A .
P1747 * EPC, wiring, PCM EPC solenoid circuit failure, shorted circuit or output driver Voltage through EPC solenoid is checked. An error will be noted if tolerance is exceeded. Short circuit causes minimum EPC pressure (minimum capacity) and limits engine torque (alternate firm). Go To Pinpoint Test D .
P1401 - DPF EGR Sensor Circuit High Voltage Detected The EGR monitor checks the DPF EGR sensor signal to the PCM for high voltage. The test fails when the average voltage to the PCM goes to a voltage greater than the maximum calibrated value.
  • DPF EGR circuit open
  • VREF short to PWR
  • Damaged DPF EGR sensor
  • DPFEGR circuit short to PWR
  • SIG RTN circuit open
  • Damaged PCM
A DPF EGR PID reading greater than 4.5 volts with the key ON and engine OFF or running, indicates a hard fault.
P1451 - EVAP Control System Canister Vent Solenoid Circuit Malfunction Monitors the canister vent (CV) solenoid circuit for an electrical failure. The test fails when the signal moves outside the minimum or maximum allowable calibrated parameters for a specified canister vent duty cycle by PCM command.
  • VPWR circuit open
  • CV solenoid circuit shorted to PWR GND or CHASSIS GND
  • Damaged CV solenoid
  • CV solenoid circuit open
  • CV solenoid circuit shorted to VPWR
  • Damaged PCM
To verify normal function, monitor the EVAP canister vent solenoid signal PID EVAPCV and the signal voltage (PCM control side). With the valve open, EVAPCV will indicate 0 percent duty cycle and the voltage approximately equal to battery voltage. When the valve is commanded fully closed, EVAPCV will indicate 100% duty cycle and a voltage drop of 4 volts minimum is normal. Output test mode may be used to switch output ON/OFF to verify function.
Look's like you have multiple problems an to say what the problem could be would be guessing . Your best bet ,take it to a qualified repair shop .

Oct 17, 2017 | 2001 Ford Expedition

1 Answer

My ford taurus SE 1999 have 3 codes P1504, P1507 and P1131


DTC Description Possible Causes Diagnostic Aides 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.
P1507 - Idle Air Control (IAC) Underspeed Error This DTC is set when the PCM detects engine idle speed that is less than the desired rpm.
  • IAC circuit open
  • IAC circuit short to PWR
  • VPWR to IAC solenoid open
  • Air inlet is plugged
  • Damaged IAC solenoid
  • Damaged PCM
  • The IAC solenoid resistance is from 6 to 13 ohms
  • Disconnect IAC valve and look for no change in engine rpm as an indication of a stuck or damaged valve
P1131 - Lack of HO2S-11 Switch, Sensor Indicates Lean A HEGO sensor indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.
  • Electrical:
    • Short to VPWR in harness or HO2S
    • Water in harness connector
    • Open/Shorted HO2S circuit
    • Corrosion or poor mating terminals and wiring
    • Damaged HO2S
    • Damaged PCM
  • Fuel System:
    • Excessive fuel pressure
    • Leaking/contaminated fuel injectors
    • Leaking fuel pressure regulator
    • Low fuel pressure or running out of fuel
    • Vapor recovery system
  • Induction System:
    • Air leaks after the MAF
    • Vacuum Leaks
    • PCV system
    • Improperly seated engine oil dipstick
  • EGR System:
    • Leaking gasket
    • Stuck EGR valve
    • Leaking diaphragm or EVR
  • Base Engine:
    • Oil overfill
    • Cam timing
    • Cylinder compression
    • Exhaust leaks before or near the HO2S(s)
A fuel control HO2S PID switching across 0.45 volt from 0.2 to 0.9 volt indicates a normal switching HO2S.

Mar 16, 2011 | 1999 Ford Taurus

3 Answers

The error code P1401 comes up on my Ford Taurus SE 2002. Can you tell me what it stands for and how to fix the problem?


P1401 - DPFE EGR CIRCUIT HIGH INPUT

Your DPFE is no good hate to say but probably was your proplem the whole time none of the other parts not needed except the fuel filter and pcv good PM stuff there. The DPFE is either going to be a silver or black box around where the egr valve is. be sure not to get the hoses crossed when putting it back on.

Keep us updated.

Dec 08, 2010 | 2002 Ford Taurus

1 Answer

99 5.4 Expedition issues


P0401 - EGR Flow Insufficient Detected The EGR system is monitored during steady state driving conditions while the EGR is commanded on. The test fails when the signal from the DPF EGR sensor indicates that EGR flow is less than the desired minimum.
  • Vacuum supply
  • EGR valve stuck closed
  • EGR valve leaks vacuum
  • EGR flow path restricted
  • EGRVR circuit shorted to PWR
  • VREF open to DPF EGR sensor
  • DPF EGR sensor downstream hose off or plugged
  • EGRVR circuit open to PCM
  • VPWR open to EGRVR solenoid
  • DPF EGR sensor hoses both off
  • DPF EGR sensor hoses reversed
  • Damaged EGR orifice tube
  • Damaged EGRVR solenoid
  • Damaged PCM

P1299 - Cylinder Head Over Temperature Protection Active Indicates an engine overheat condition was detected by the cylinder head temperature (CHT) sensor. An FMEM Strategy called Fail-safe Cooling was activated to cool the engine.
  • Engine cooling system concerns
  • Low engine coolant level
  • Base engine concerns

P0300 - Random Misfire The random misfire DTC indicates multiple cylinders are misfiring or the PCM cannot identify which cylinder is misfiring.
  • Camshaft position sensor (CMP)
  • Low fuel: less than 1/8 tank
  • Stuck open EGR valve

P0443 - EVAP Control System Canister Purge Valve Circuit Malfunction The PCM monitors the EVAP canister purge valve circuit for an electrical failure. The test fails when the signal moves outside the minimum or maximum allowable calibrated parameters for a specified purge duty cycle by PCM command.
  • VPWR circuit open
  • EVAP canister purge valve circuit shorted to GND
  • Damaged EVAP canister purge valve
  • EVAP canister purge valve circuit open
  • EVAP canister purge valve circuit shorted to VPWR
  • Damaged PCM

P1451 - EVAP Control System Canister Vent Solenoid Circuit Malfunction Monitors the canister vent (CV) solenoid circuit for an electrical failure. The test fails when the signal moves outside the minimum or maximum allowable calibrated parameters for a specified canister vent duty cycle by PCM command.
  • VPWR circuit open
  • CV solenoid circuit shorted to PWR GND or CHASSIS GND
  • Damaged CV solenoid
  • CV solenoid circuit open
  • CV solenoid circuit shorted to VPWR
  • Damaged PCM

P1309 - Misfire Monitor Disabled When the misfire monitor is disabled, usually due to the input signal generated by the camshaft position (CMP) sensor, by sensing the passage of teeth from the CMP wheel.
  • Camshaft position sensor
  • Powertrain control module
  • ECT, MAF, and CKP sensors

with the codes you have here I would look in the direction of the egr valve first because that will cause the bucking and stalling, and the misfires, but so will the canister vent solonoid. the misfire codes and the cylinder overtemp code could be from overheating or because if the misfires.

Jul 27, 2009 | 1999 Ford Expedition

2 Answers

Describe your 1996 Ford Explorer Problem..trouble


Diagnostic Trouble Code (DTC) P0443 indicates a failure in the EVAP canister purge valve circuit.
Possible causes:
  • VPWR circuit open.
  • EVAP canister purge valve circuit open.
  • EVAP canister purge valve circuit shorted to PWR GND.
  • EVAP canister purge valve circuit shorted to VPWR.
  • Damaged EVAP canister purge valve.
  • Damaged PCM.

Jul 10, 2009 | 1996 Ford Explorer

1 Answer

I have a fail code (P1409) on my 1998 FOrd Expedition, 4.6L. Where can I get this part? Thanks, Alec


Code indicates bad EGR Vacuum Solenoid. Chilton lists possible causes below. Here's a link to the part you want. Best of luck!
Greg

http://www.rockauto.com/catalog/raframecatalog.php?carcode=1304402&parttype=4964&a=FRc1304402k943582

Possible Causes:
  • EGR VR solenoid circuit is open, or shorted to ground
  • EGR VR circuit is shorted to power or the VPWR circuit is open
  • EGR vacuum regulator solenoid is damaged or the PCM has failed

May 19, 2009 | 1998 Ford Expedition

1 Answer

Check engine light 97 ford explorer. obd-II po141 bank 1 sensor 2. need to locate sensor


Looked up your OBD II code for your Explorer and got the following: Bank 1 Sensor 1
The possible causes are listed below per Chilton: *same result for all engines available on your vehicle

Trouble Code: P0141 (4.0L V6 VIN E Auto)
HO2S-11 Heater Circuit (Bank 1, Sensor 1) Print this code dataprint_icon_codes.gif
Number of Trips to Set Code: 2
OBD II Monitor Type: CCM Details
Indicators: MIL Details
Trouble Code Conditions:
During testing the heated oxygen sensor (HO2S) heaters are checked for open and short circuits and excessive current draw. The test fails when the current draw exceeds a calibrated limit or an open or short circuit is detected.
Possible Causes:
  • Vacuum hose disconnected on exhaust gas recirculation (EGR) system module (ESM) applications* Short to VPWR in the harness or HO2S
  • Water in the harness connector
  • Open VPWR circuit
  • Open GND circuit
  • Low battery voltage
  • Corrosion or incorrec
The sensors themselves appear in the illustration linked to below. The illustration is for the Ford Ranger but indications are that other models have similar locations. Hope this helps with your problem. Best of luck!
Greg

http://www.chiltonlibrary.com/content/images/8968/images/89684g23.pdf

May 17, 2009 | 1997 Ford Explorer AWD

1 Answer

I just bought a 1997 Mercury Sable it was a private sale. Once I got it home the check engine light was on can't remember the code but it when I looked it up it was the canister purge valve. Spent $80. for...


P0401 insufficient EGR flow.

Possible causes:
  • Fault in vacuum supply to EGR vacuum regulator solenoid.
  • EGR valve stuck closed or iced.
  • EGR valve diaphragm leaks.
  • EGR valve or flow path restricted.
  • EGR vacuum hose off, plugged or leaks.
  • VPWR circuit open to EGR Vacuum Regulator solenoid.
  • EVR circuit to PCM open.
  • EVR circuit to PCM shorted to PWR.
  • Differential Pressure Feedback EGR (D.P.F. EGR) sensor pressure hoses both connected improperly.
  • D.P.F. EGR sensor pressure hoses reversed.
  • D.P.F. EGR sensor VREF circuit open.
  • Downstream pressure hose off.
  • Downstream pressure hose plugged.
  • Damaged orifice tube assembly.
  • Damaged EGR Vacuum Regulator solenoid.
  • Damaged D.P.F. EGR sensor.
  • Damaged PCM.



P0443 indicates an intermittent EVAP canister purge valve circuit failure.
Possible causes:
  • Intermittent EVAP canister purge valve or VPWR circuit open.
  • Damaged EVAP canister purge valve.

Mar 13, 2009 | 1997 Mercury Sable

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