Question about 2002 Ford Explorer Sport Trac

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Low voltage at differential code 1400 on 2002sport trac

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P1400-DPF EGR Sensor Circuit Low Voltage Detected

Ideally you should follow the proper diagnostic procedure for this issue.
The dealer may or may not

I would go to a local shop,which will scan your vehicle and change your EGR Valve,and most likely that will be the proper repair.

Hopefully you all ready have a working relationship with someone and go there several times a year,even when you don't have issues. Like going to a doctor for a check up

Posted on May 06, 2010


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Code p1400 gmc enjoy 2007 what is the problem in this code

Definition of Diagnostic Trouble Code P1400 Audi: EGR Valve Circ Electrical Malfunction BMW: Heated Catalyst Battery Voltage or Current too Low during Heating (Bank 1) Chrysler: Manifold Differential Pressure Sensor Circuit Malfunction Dodge: Manifold Differential Pressure Sensor Circuit Malfunction Ford: Differential Pressure Feedback EGR Circuit Low Input Hyundai: EGR System Monitor Malfunction Infiniti: EGRC Solenoid/V Jaguar: Exhaust Gas Recirculation Valve Position Control Jeep: Manifold Differential Pressure Sensor Circuit Malfunction Lexus: Sub-TPS Malfunction Lincoln: Differential Pressure Feedback EGR Circuit Low Input Mazda: DPFE Sensor Circuit Low Input Mercedes: EGR Switchover Valve Malfunction (C230 Only) Mercury: Differential Pressure Feedback EGR Circuit Low Input Mitsubishi: Manifold Differential Pressure Sensor Circuit Malfunction Nissan: Differential Pressure Feedback EGR Circuit Low Input Subaru: Fuel Tank Pressure Control Solenoid Circuit Low Input Toyota: Sub-Throttle Position Sensor Malfunction Volkswagen: EGR Valve Circ Electrical Malfunction

Jun 20, 2015 | 2007 GMC Envoy Denali

1 Answer

F350 rear axle

Well it means the differential has been low on oil for a while.
Did the "stuff" look like fiber material from clutch discs ?

May 04, 2013 | Cars & Trucks

1 Answer

91ford f150, 4.9l. sets code low voltage to egr. same time the oil gauge reads low. used to bounce at same time the problem happened. i think it's the low voltage regulator. but where is it? it's...

Well, your question does not explain or give any examples of the problem you're having, which led you to obtain any codes or what code was actually given.

Although part of your message leads me to think you just need a new oil pressure sending unit. At which point, the low voltage problem may disappear.

About the Code however, while you did not mention what code number was given. I will mention how there are a few codes which stipulate "low voltage to egr" before listing other possible culprits to consider.

But since you stated low voltage to EGR you may need to just replace the EGR Valve

Although depending on your skill level and tools you have on hand. You may want to consider removing the throttle body and cleaning the passages behind it where gunk builds up.

You could also consider cleaning behind the (Idle Air Control Valve) IACV since it is another culprit which causes these codes. I always clean before I replace... It's cheaper

But again a code describing low voltage to egr could also point to other things like The (Differential Pressure Feedback EGR) DPFE sensor which measures the flow of the EGR, which may need replacing

So honestly, it would really help to know exactly what code, in order to better assist you.

Hope you found this useful
Good Luck and Happy Motoring


Jun 12, 2011 | 1991 Ford F150

1 Answer

Engine light on code is a p1400

This Code means the Differential pressure feedback sensor has low Voltage. It can also mean there is no Voltage or a vacuum line is loose. The switch is a DPFE switch which helps control the EGR. Check the connector for corrosion or replace the switch.

You will need to wipe the Code from the computer. Autozone, Oreillys, and Advance will scan your vehicle for free and can wipe the Code after you replace your switch.

Feb 28, 2011 | Ford Ranger Cars & Trucks

3 Answers

Ford Taurus. Check Engine Light Code P1400

P1400 Exhaust Gas Recirculation valve position sensor
P1401 Exhaust Gas Recirculation valve position sensor
P1402 Exhaust Gas Recirculation metering orifice restricted
P1403 Exhaust Gas Recirculation differential pressure sensor
P1404 EGR Temperature Sensor circuit
P1405 Exhaust Gas Recirculation Differential Pressure Feedback Sensor upstream hose off or plugged
P1406 Exhaust Gas Recirculation Differential Pressure Feedback Sensor downstream hose off or plugged
P1407 EGR solenoid -No Flow Detected
P1408 EGR solenoid -Flow out of Self- Test Range
P1409 EGR Vacuum Regulator solenoid circuit malfunction
The sensor for the EGR Valve position is not functioning correctly.

Oct 16, 2010 | 2002 Ford Taurus

1 Answer

Get a p1400 code check engine light

P1400 - DPFE (Differential Pressure Feedback Electronic) Sensor circuit Low Voltage

The DPFE sensor is usually not hard to change. There are 2 small rubber hoses that run from the EGR tube to it...


Replace DPFE sensor, reset engine fault codes. The Ford one is a good one and carries Airtex. Sometimes I hear that this change always need replace EGR valve to delet all codes. Test it.

Good luck.

Jul 07, 2010 | 2002 Ford Explorer Sport Trac

3 Answers

Wat does code p1400 means

In order to give you accurate information. I need size of engine example 2.0 L 3.0L. but code P1400 means Differential Pressure feedback EGR circuit low input. Maybe your differential oil is low.

Apr 01, 2010 | 2002 Ford Taurus

1 Answer

Tring to find out what type oil goes in the rear axle of a 2003 dodge dakota 4x4 with a 4.6 engine

Mopart Synthetic Gear Lubricant 75W-90
Trac-Lok T differentials require Limited Slip Additive in the lubricant.
Trac-Rite differentials DO NOT require Limited Slip Additive.

Nov 28, 2009 | 2003 Dodge Dakota Club Cab

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