P0400 OBD Engine Code Logo   Code #P0400 -
Exhaust Gas Recirculation Flow

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Nissan Altima
Failed emissions test



engnine cut off

Cadillac Brougham
It came on two weeks Monday and went off one week later and it came back on two days ago.

No symtons car runs fine, the check engine light is on. I don't know what to fix,.

Suzuki XL7
error p0400

Mitsubishi Montero Sport
check engine light came on 3 days ago cars rides sounds great like theres no problem changed the egr valve and it did not fix it checked all the vacuum hoses and they are good

Toyota Avensis
P0400 fault code. New EGR Fitted, inlet manifold removed and cleaned. Flow pipe through cylinder head cleaned. Car runs fine, no loss of power or cutting out.

irepleace the egr valve and now mi van works good but the code p0400 apears i don't feel any troulbe any more what nao?

missing vacuum line to elbow fitting on purge vac. diognostic switch. is this hose needed

Check Engine light on.

Nissan 240SX
code po 400

runs god excheng oxygen sensors show po 400 code

Mercedes benz ml320 year 2001

Mercury Villager
Car shakes and rougf idle

Mazda Millenia

Toyota Camry


Saab 9-3
p0400 egr flow malfunction

Toyota Avensis
Exhaust flow recirculation


Suzuki Grand Vitara
Idles roughly and little less power.

Nissan Frontier

Mercedes-Benz S430
No symptoms detected by driver other than the error code

Mitsubishi Eclipse
reduced power

Idea to fixe

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When did your Check Engine Light Come On?
Does your Car Start?
Does your Car Vibrate? Shake?
Does your Car Idle Roughly? Reduced Power?

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Other Comments

P0513 Chrysler Pacifica
I changed the tumbler and had the key changed to fit the tumbler.Car will not start.Acceseries lights come but no start

P0513 The tumbler was changed and key altered to fit new tumbler

P0113 Ford Crown Victoria
car shuts off

P0113 car shut off

P0101 P0101

Other Check Engine Light Codes

P0128   Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
P0212   Injector Circuit - Cylinder 12
P0238   Turbo/Super Charger Boost Sensor 'A' Circuit High
P0252   Injection Pump Fuel Metering Control 'A' Range/Performance (Cam/Rotor/Injector)
P0368   Camshaft Position Sensor 'B' Circuit High Input (Bank 1)
P0416   secondary Air Injection System Switching Valve 'B' Circuit Open
P0631   VIN Not Programmed or Mismatch - TCM
P0762   Shift Solenoid 'C' Stuck On
P0873   Transmission Fluid Pressure Sensor/Switch "C" circuit High
P0880   TCM Power Input Signal

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