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  #1  
Old 10-17-2010, 04:43 PM
drewglenn04 drewglenn04 is offline
Ford Ranger Driver
 
Join Date: Dec 2009
Posts: 78
Question Brand New EGR Valve - same codes P0401 & P1401

Hey all, my Check Engine light has been on for years, sick of it. Codes are:
P0401 - EGR Flow Insufficient
P1401 - EGR EVP Sensor Circuit High Voltage Detected

Just put in a new EGR valve for $50 some buck and yeah, waste of money there I guess...does anybody know what the real problem could be?

Thanks, Drew
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2002 XLT Ext. Cab
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Fog Light Mod, Throttle Mod, Torsion Bars Cranked
265/75/R16 Tires, Air Silencer Removal Mod
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  #2  
Old 10-17-2010, 07:57 PM
Scottg Scottg is offline
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Default Re: Brand New EGR Valve - same codes P0401 & P1401

Quote:
P0401 Insufficient EGR Flow Detected
Printer Friendly
P0401 Insufficient EGR Flow Detected
Possible Causes Setting Conditions
* DPFE sensor signal circuit is shorted to ground
* DPFE sensor reference (5v) circuit is open or shorted to ground
* DPFE sensor downstream hose off or plugged
* DPFE sensor hoses both off, loose or damaged
* DPFE sensor hoses connected wrong (reversed)
* EGR orifice tube is damaged or restricted
* PCM has failed
Engine running; engine operating under steady road-load conditions in Closed Loop, and the PCM detected the DPFE sensor indicated insufficient EGR gas flow. Perform the KOER Self-Test, and if DTC P1408 is set, then this code is considered an active code.
This code sets in 2 Trip(s).
This code will turn on the MIL (Malfunction Indicator Lamp)
Malfunction Indicator Lamp
The Malfunction Indicator Lamp (MIL) alerts the driver that the Powertrain Control Module (PCM) or Transmission Control Module (TCM) has detected an OBD II emission-related component or system fault. When this type of malfunction occurs, an OBD Diagnostic Trouble Code (DTC) will be set. The MIL is located on the instrument cluster and is labeled CHECK ENGINE, SERVICE ENGINE SOON, or it is identified with the ISO standard engine symbol (which is a picture of an engine).
Prove-Out Test
The instrument cluster (IC) and other vehicle modules carry out a display prove-out to verify that all module controlled warning/indicator lamps and monitored systems are functioning correctly within the instrument cluster (IC). The instrument cluster (IC) and other modules such as the Powertrain Control Module (PCM) provide a timed prove-out while other indicators illuminate until engine start up. When the ignition switch is cycled to the "on" position with the engine off, the indicators illuminate to prove-out for 3 seconds.
Instrument Cluster (Gateway) Function
The instrument cluster (IC) acts as a gateway module by receiving information in one format and transmitting it to other modules using another format. For example, the instrument cluster (IC) receives the vehicle speed data from the PCM over the HS-CAN, converts the data into a MS-CAN message and sends (gateways) the message to other network modules such as the HVAC module, the tire pressure monitoring system (TPMS), the parking aid module (PAM), and the SJB. This enables network communication between modules that do not communicate using the same network (HS-CAN or the MS-CAN).
EGR SYSTEM MONITOR DRIVE CYCLE INSTRUCTIONS
* Do not turn off the ignition switch during the test procedure.
* All Onboard System Readiness (OSR) codes are cleared when the battery is disconnected or when the Powertrain Control Module (PCM) is cleared with the Scan Tool.
* This drive cycle can be used to determine if the Readiness code for this Monitor will run and complete, and if the MIL will remain off after the vehicle is driven.
* Operating Ranges: Whenever a range of values is provided, try to operate the vehicle in the middle of the range. For example, if the vehicle speed range calls for 45-55 mph, operate the vehicle at as close as possible to 50 mph. Or if the engine speed should be 1,000-2,000 rpm, try to operate the engine at 1,500 rpm.
* Scan Tool Data: There are certain Parameter Identification (PID) values that must be within range before this Monitor will "run". It can be helpful to pull up those PID items on the Scan Tool so an assistant can view them during testing.
EGR SYSTEM MONITOR PRETEST CONDITIONS
* MIL is off.
* No Emission related DTC's are present.
* ECT signal greater than 170F.
* IAT signal between 20F-130F.
TEST PROCEDURE
1. Connect the Scan Tool to the data link connector (DLC). Turn the key on and bring up the ECT PID and IAT PID on the Scan Tool. Verify that the IAT PID value is between 40-100F.
2. Use the Scan Tool to clear any stored DTC's and to reset the OSR Monitors. Note that DTC P1000 will appear once all of the trouble codes are cleared. Start the engine without turning off the ignition key. Allow the engine to run at idle speed for 15 seconds.
3. Accelerate at part-throttle to 40 mph (67 km/h) and maintain that speed until the ECT PID reaches 170F. Bring the vehicle to a stop in a safe place. Then accelerate at a 1/2 to 3/4 throttle opening to 45 mph (72 km/h). Repeat this step 3 times.
4. Check the status of the Readiness code for the EGR System Monitor. It should change to YES. If it does, perform any additional driving under the conditions required to run the remainder of the Monitors. If the Readiness code does not change to YES, check for any Pending codes in the Generic OBD II section of the Scan Tool. If no Pending codes are set, and the status did not change to YES, return to step 3 and repeat the test procedure

All signs point to an Differential Pressure Feedback EGR (DPFE) Sensor, which is common in fords, id recommend a OEM replacement
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2004 Explorer Sport Trac XLT premium 4.0L auto 4wd
1995 Ranger XLT ext cab 3.0L auto 2wd
2005 Jeep Liberty Limited 3.7L auto 4wd
2001 Ranger XLT reg cab 2.3L auto 2wd--SOLD
1999 Ranger XLT reg cab 2.5L manual 2wd--SOLD
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  #3  
Old 10-17-2010, 07:58 PM
Scottg Scottg is offline
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Default Re: Brand New EGR Valve - same codes P0401 & P1401

Quote:
P1401 DPFE Sensor Circuit High Voltage Printer Friendly P1401 DPFE Sensor Circuit High Voltage Possible Causes Setting Conditions * DPFEGR sensor connector is damaged (check pins for damage, and moisture) * DPFEGR signal circuit is open or shorted to voltage * DPFEGR return circuit is open * DPFEGR sensor has failed * PCM has failed Key on or engine running; and the PCM detected the DPF EGR sensor signal was more than the maximum calibrated value of 4.50v. Note: The DPF EGR PID will read more than 4.5v with this code set. This code sets in 2 Trip(s). This code will turn on the MIL (Malfunction Indicator Lamp) Malfunction Indicator Lamp The Malfunction Indicator Lamp (MIL) alerts the driver that the Powertrain Control Module (PCM) or Transmission Control Module (TCM) has detected an OBD II emission-related component or system fault. When this type of malfunction occurs, an OBD Diagnostic Trouble Code (DTC) will be set. The MIL is located on the instrument cluster and is labeled CHECK ENGINE, SERVICE ENGINE SOON, or it is identified with the ISO standard engine symbol (which is a picture of an engine). Prove-Out Test The instrument cluster (IC) and other vehicle modules carry out a display prove-out to verify that all module controlled warning/indicator lamps and monitored systems are functioning correctly within the instrument cluster (IC). The instrument cluster (IC) and other modules such as the Powertrain Control Module (PCM) provide a timed prove-out while other indicators illuminate until engine start up. When the ignition switch is cycled to the "on" position with the engine off, the indicators illuminate to prove-out for 3 seconds. Instrument Cluster (Gateway) Function The instrument cluster (IC) acts as a gateway module by receiving information in one format and transmitting it to other modules using another format. For example, the instrument cluster (IC) receives the vehicle speed data from the PCM over the HS-CAN, converts the data into a MS-CAN message and sends (gateways) the message to other network modules such as the HVAC module, the tire pressure monitoring system (TPMS), the parking aid module (PAM), and the SJB. This enables network communication between modules that do not communicate using the same network (HS-CAN or the MS-CAN). COMPONENT MONITOR DRIVE CYCLE INSTRUCTIONS * Do not turn off the ignition switch during the test procedure. * All Onboard System Readiness (OSR) codes are cleared when the battery is disconnected or when the Powertrain Control Module (PCM) is cleared with the Scan Tool. * This drive cycle can be used to determine if the Readiness code for this Monitor will run and complete, and if the MIL will remain off after the vehicle is driven. * Operating Ranges: Whenever a range of values is provided, try to operate the vehicle in the middle of the range. For example, if the vehicle speed range calls for 45-55 mph, operate the vehicle at as close as possible to 50 mph. Or if the engine speed should be 1,000-2,000 rpm, try to operate the engine at 1,500 rpm. * Scan Tool Data: There are certain Parameter Identification (PID) values that must be within range before this Monitor will "run". It can be helpful to pull up those PID items on the Scan Tool so an assistant can view them during testing. * The Readiness code for this Monitor defaults to "continuous" or "monitoring" because this Monitor runs continuously when the engine is cranking or running. COMPONENT MONITOR PRETEST CONDITIONS * MIL is off. * No Emission related DTC's are present. * IAT sensor signal between 40-100F. TEST PROCEDURE 1. Connect the Scan Tool to the data link connector (DLC). Turn the key on and bring up the ECT PID and IAT PID on the Scan Tool. Verify that the IAT PID is between 40-100F. 2. Use the Scan Tool to clear any stored DTC's and to reset the OSR Monitors. Note that DTC P1000 will appear once all of the trouble codes are cleared. Start the engine without turning off the ignition key. Allow the engine to run at idle speed for 15 seconds. 3. Accelerate at part-throttle to 40 mph and maintain that speed until the ECT PID reaches 170F (77C). Bring the vehicle to a stop, and then allow the engine to idle with the transmission in Drive (in Neutral for M/T) for 2 minutes. 4. Then accelerate at moderate throttle in Overdrive (if equipped with O/D) to 50 mph (80 km/h) and maintain that speed for 15 seconds. Bring the vehicle to a stop, change out of Overdrive, and then accelerate to 40 mph (64 km/h) and maintain that speed for 15 seconds. Bring the vehicle to a stop and allow the engine to idle for 15 seconds. Repeat this step at least 5 times. 5. Check for any Pending codes in the Generic OBD II section of the Scan Tool. If no Pending codes are set, the Component Monitor test is complete. If any Pending codes are set, refer to the appropriate trouble code repair information to make the repair.
more code info from Indentifx
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2004 Explorer Sport Trac XLT premium 4.0L auto 4wd
1995 Ranger XLT ext cab 3.0L auto 2wd
2005 Jeep Liberty Limited 3.7L auto 4wd
2001 Ranger XLT reg cab 2.3L auto 2wd--SOLD
1999 Ranger XLT reg cab 2.5L manual 2wd--SOLD
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  #4  
Old 10-17-2010, 09:35 PM
sgtsandman sgtsandman is offline
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Default Re: Brand New EGR Valve - same codes P0401 & P1401

if the EGR didn't fix it, then the DPFE. It fixed my buddie's F-150 with a 4.2L. It's been running great ever since.
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2011 Ranger XLT, 4X4, 4 door Super Cab. 4.0L, 5 Speed M50D-R1HD, 3.73:1, 8.8" open differential, Jason Pace cap
1999 Honda CR-V EX, RT4WD, 2.0L, 5 Speed MT, 4.56:1, open differential
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  #5  
Old 10-20-2010, 01:09 PM
Solo V8 4G Solo V8 4G is offline
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Posts: 139
Default Re: Brand New EGR Valve - same codes P0401 & P1401

Yeah, i would have suspected the DPFE from the get go. To save you time and money get a vacuum gauge and a multi-meter. That way you can actually diagnose instead of spending money on uneccessary parts. Also the DPFE may have a recall on it as well, check with your local dealer or call Ford Customer Service 1-800-392-3673
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98 Ranger, Bagged 2600's in the front, 2500's in the rear. 3 Gal tank. DJM Upper and Lower control arms. 2 Thomas Compressors (garbage). 4 linked rear with C-notch. All (except cab) fiberglass. Custom Tribal Paint (soon to be Sunburst/burnt Orange).
Coming soon - 405HP 4.6L (SOHC), 4R70W
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  #6  
Old 11-04-2010, 08:42 PM
drewglenn04 drewglenn04 is offline
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Join Date: Dec 2009
Posts: 78
Default Re: Brand New EGR Valve - same codes P0401 & P1401

DPFE Sensor it was...thanks guys
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Drew

2002 XLT Ext. Cab
4x4 Off Road 4.0L

Fog Light Mod, Throttle Mod, Torsion Bars Cranked
265/75/R16 Tires, Air Silencer Removal Mod
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  #7  
Old 11-05-2010, 06:06 AM
Solo V8 4G Solo V8 4G is offline
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Posts: 139
Default Re: Brand New EGR Valve - same codes P0401 & P1401

No biggie, thats we are here for. Next time, save yourself some money and get with us here on the forum. Glad to hear things are good now!
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98 Ranger, Bagged 2600's in the front, 2500's in the rear. 3 Gal tank. DJM Upper and Lower control arms. 2 Thomas Compressors (garbage). 4 linked rear with C-notch. All (except cab) fiberglass. Custom Tribal Paint (soon to be Sunburst/burnt Orange).
Coming soon - 405HP 4.6L (SOHC), 4R70W
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