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I have a 99 F350, 4X4, V-10 and have an error code P1401, other than emission what specifically does P1401 mean?

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P1401= DPFE (Differential Pressure Feedback EGR) circuit high input. countrycurt0

Posted on Sep 15, 2008

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2001 ford crown victoria 4.6L engine with codes p1288 and p1401


The 1401 code is for a DPFE switch or connector that is not sending the correct signal the PCM expects. The 1288 code is for a temperature sensor which may be showing a higher cylinder head temperature due to low coolant levels, blockage of water flow or bad thermostat.

The DPFE gives readings of the mix of exhaust gas returning into the intake manifold to be burned again to lower emissions.

The combination of these 2 codes can mean that too much exhaust gas is too frequently going into the intake manifold and is overheating the cylinder head causing the 1288 code. So fixing the DPFE may eliminate this secondary error which may reset itself after the first problem is fixed.

Nov 06, 2013 | 2001 Ford Crown Victoria

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P1401


Diagnostic Trouble Code (DTC) P1401 indicates that the EGRP SIG circuit input is greater than the self-test maximum.

Possible Causes:

-- Damaged EGR Position sensor/EGR valve assembly.
-- Open in EGR Position sensor harness circuit.
-- Short to EGR Position sensor harness circuit.
-- Damaged EGR Vacuum solenoid.
-- Damaged EGR Vacuum solenoid harness circuits.
-- Damaged EGR Vacuum solenoid-valve.
-- Damaged PCM.

Hope this helps, also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Apr 12, 2012 | 2002 Mazda Tribute

1 Answer

Car sometimes wont start unless you spray starter fluid, just replaced filter. oem codes are p0734 and p1401


P0734 = 4th gear incorrect ratio (that's the torque converter 'lock-up' clutch - inside the converter).
P1401 = doesn't exist for 2002 Hyundai Accent's
P1401 exists for 2000 Accent = DM-TL Air Pump Motor Curent Draw is higher or lower than expected (normal is 17-36 mA). DM-TL = Diagnostic Module for Tank Leakage & is part of the Evaporative Emissions Control System.

These two DTC's are not associated/part of the Accent's Engine Managemenet System (EMS).
Best to have a qualified/certified Hyundai Service Technician properly diagnose this starting problem with your vehicle.

Aug 31, 2011 | 2002 Hyundai Accent

1 Answer

Orange engine light on and off at random. have 2 codes saying P1401 & P1237. Any idea what the codes mean?


No, but check engine light mean emissions control system
fault. Have Honda deal with it because the have the proper
diagnostic equipment and parts to correct the problem. I
wouldn't use after market parts.

Feb 13, 2011 | 2002 Honda Civic

1 Answer

What does check engine code p1401 mean


http://www.explorerforum.com/forums/showthread.php?t=133294

Your part may be covered under the emission control warranty. Otherwise check out the link above.

Nov 06, 2010 | 1997 Ford Explorer AWD

1 Answer

Check engine light says on . code 1401,what does it mean?


P1401 - DM-TL air pump motor current draw is higher or lower than expected (normal = 17-36 mA).

This is an electrical issue with the pump, it's not related to a leak in the evaporative emission control system.

Dec 11, 2009 | 2002 Hyundai Accent

1 Answer

2000 Hyundai Accent


00-30-001 2000 ACCENT DMTL DIAGNOSIS: DTC CODES P1401, P1402 AND P1403

p1402 - dm-tl air pump motor is shorted or disconnected.

2000 model year accent is equipped with a new enhanced evaporative emission system. this new system is capable of measuring leaks as small as 0.020" diameter. the new system pressurizesthe evaporative emission system with a diagnostic module for tank leakage (dm-tl), while the previous model's system appliedengine vacuum through the purge valve to detect system leaks.

service information
vehicles that have the check engine light illuminated and have dtc p1401, p1402 and p1403 stored in the ecm should have their electrical systems diagnosed related to the appropriate dtc. these codes are not related in any way to an evaporative emission system leak. the conditions that set the diagnostic codes areas follows:
p1401 - dm-tl air pump motor current draw is higher or lower than expected (normal = 17-36 ma).
p1402 - dm-tl air pump motor is shorted or disconnected.
p1403 - dm-tl changeover valve is shorted or disconnected

Jun 04, 2008 | 2000 Hyundai Accent

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