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Code P0403

Tiny
GIGISULAMANIDZE1
  • MEMBER
  • 2003 FORD ESCAPE
  • 3.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 191,000 MILES
Hi, I have MIL light on. I checked and found code p0403 exhaust gas re-circulation control circuit.

DTC-CNT 1
FUEL SYSTEM1 _ CL
FUEL SYSTEM2 _ N/A
LOAD-pct(%) _33.3
SHRIFT1(%)_ 1.6
LONGFT1(%)_ -3.1
SHRIFT2(%)_ 1.6
LONGFT2(%)_ -2.3
RPM(MIN)_ 758
SPARKDV_15
IAT (c)_ 47
MAF(G/S)_ 3.85
TP(%)_19.2
o2b1s1(v) 0.080
shriftb1s1(%) _0.8
o2b1s2(v)_ 0.100
o2b2s1(v)_ 0.085
o2b2s2(v)_ 0.085
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Wednesday, May 23rd, 2018 AT 12:22 PM

30 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon.

There is nothing on the list for the EGR system at all.

This code is referring to either the PCM internal short or the EGR solenoid itself.

Roy

Symptom/DTC P0403
Descriptor
Eegr Electric Motor Windings Or Circuits To The Pcm Shorted Or Open
Egr Vacuum Regulator Solenoid Circuit Malfunction
Probable Causes
EGR Vacuum Regulator (EGRVR) Solenoid Circuit Open (Non-Electric Exhaust Gas Recirculation Vehicles)
EGR Vacuum Regulator (EGRVR) Solenoid Circuit Short to Ignition Switched Power (VPWR) or Ground (Non-Electric Exhaust Gas Recirculation Vehicles)
EGR Vacuum Regulator (EGRVR) Solenoid Damaged (Non-Electric Exhaust Gas Recirculation Vehicles)
Electric Exhaust Gas Recirculation (EEGR) Connector Not Seated (For Electric Exhaust Gas Recirculation Vehicles)
Electric Exhaust Gas Recirculation (EEGR) Motor Short Circuit (For Electric Exhaust Gas Recirculation Vehicles)
Electric Exhaust Gas Recirculation (EEGR) Motor Windings Open (For Electric Exhaust Gas Recirculation Vehicles)
Harness Short Circuit From Powertrain Control Module (PCM) to Electric Exhaust Gas Recirculation (EEGR) (For Electric Exhaust Gas Recirculation Vehicles)
Ignition Switched Power (VPWR) Open to EGR Vacuum Regulator (EGRVR) Solenoid (For Non-Electric Exhaust Gas Recirculation Vehicles)
Open Circuit In Harness From Powertrain Control Module (PCM) to Electric Exhaust Gas Recirculation (EEGR) (For Electric Exhaust Gas Recirculation Vehicles)
Powertrain Control Module (PCM) Damaged (Non-Electric Exhaust Gas Recirculation Vehicles)
Powertrain Control Module (PCM) Open Circuit (For Electric Exhaust Gas Recirculation Vehicles)
Powertrain Control Module (PCM) Short Circuit (For Electric Exhaust Gas Recirculation Vehicles)
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Wednesday, May 23rd, 2018 AT 12:52 PM
Tiny
GIGISULAMANIDZE1
  • MEMBER
  • 88 POSTS
EGR Vacuum regulator showed 19 ohms. When I disconnect hose from EGR there is no changes. Also, there is not a catalytic converter. Sometime car will not start it cranks, after two minutes it start normally.
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Sunday, June 17th, 2018 AT 12:48 PM
Tiny
GIGISULAMANIDZE1
  • MEMBER
  • 88 POSTS
EGR valve maybe bad? My friend sad that when you disconnect hose car must change sound but it has not changed.
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Sunday, June 17th, 2018 AT 12:50 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, the next thing I would do is to check the fuel pressure.

If you have low pressure, it will cause delayed starting as you have at the moment.

Roy
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Sunday, June 17th, 2018 AT 12:53 PM
Tiny
GIGISULAMANIDZE1
  • MEMBER
  • 88 POSTS
P0403 can caused bad fuel pressure?
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Sunday, June 17th, 2018 AT 12:55 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
No, there is no connection of the EGR system to the fuel pump control.

Roy

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Sunday, June 17th, 2018 AT 12:59 PM
Tiny
GIGISULAMANIDZE1
  • MEMBER
  • 88 POSTS
Thank you tomorrow I will try check pressure, but next problem is EGR. I think EGR valve is broken.
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Sunday, June 17th, 2018 AT 1:02 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
In order to check that system with the list I sent you, you need an advanced scan tool to turn on the solenoid to see if it responds to the commands from the PCM.

Keep me updated.

Roy
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Sunday, June 17th, 2018 AT 1:05 PM
Tiny
GIGISULAMANIDZE1
  • MEMBER
  • 88 POSTS
It respond my mechanic tried and it responds. We also checked EGR vacuum regulator showed 19 ohms, in my country there is no good mechanics for Ford.
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Sunday, June 17th, 2018 AT 1:07 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
When vacuum is applied, does the valve open?

If it opens the engine should stumble and may stall.

Roy
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Sunday, June 17th, 2018 AT 1:31 PM
Tiny
GIGISULAMANIDZE1
  • MEMBER
  • 88 POSTS
No its never happening, car never changes sound. Also, when I disconnect hose from EGR it never changes sound.
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Sunday, June 17th, 2018 AT 1:46 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Does it have vacuum?
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Sunday, June 17th, 2018 AT 1:48 PM
Tiny
GIGISULAMANIDZE1
  • MEMBER
  • 88 POSTS
How can I check that?
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Sunday, June 17th, 2018 AT 1:51 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Feel the end of the hose. It must have vacuum sent from the solenoid to operate. That is critical in operation of the valve.

Roy
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Sunday, June 17th, 2018 AT 2:00 PM
Tiny
GIGISULAMANIDZE1
  • MEMBER
  • 88 POSTS
If it working I must feel from the disconnected hose its correct?
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Sunday, June 17th, 2018 AT 2:09 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Correct. You should feel vacuum when you accelerate.

Roy
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Sunday, June 17th, 2018 AT 2:15 PM
Tiny
GIGISULAMANIDZE1
  • MEMBER
  • 88 POSTS
Hi, today I checked vacuum and there is vacuum.
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Tuesday, June 26th, 2018 AT 7:43 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
The next step is to remove the valve and see if the passages are clear. Start the car with the valve removed and you should hear a good exhaust leak and the engine will run very rough.

Roy
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Tuesday, June 26th, 2018 AT 7:47 AM
Tiny
GIGISULAMANIDZE1
  • MEMBER
  • 88 POSTS
I cleaned valve two times with carburetor cleaner. I will remove EGR valve today again.
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Tuesday, June 26th, 2018 AT 8:46 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
No, I said nothing about cleaning the valve. You need to make sure the engine passages are clear.

When you have vacuum to the valve, can you see it moving?

Roy
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Tuesday, June 26th, 2018 AT 8:49 AM

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