P0403
Exhaust Gas Recirculation Circuit Malfunction
DTC P0403, sometimes indicated as P040300 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the auxiliary emissions system causing exhaust gas recirculation circuit malfunction.
The exhaust gas recirculation (EGR) system helps reduce emissions by recirculating a portion of the exhaust gas back into the engine. If the EGR system malfunctions, it can cause a variety of problems, including engine roughness, hesitation, and loss of power.
There are a few things that can cause the EGR system to malfunction, including a defective EGR valve, a clogged EGR valve, a defective EGR solenoid, or a wiring problem.
If you suspect that the EGR system is malfunctioning, the first step is to check the EGR valve and the EGR solenoid for signs of damage or corrosion. If either of these components is defective, it will need to be replaced.
If the EGR valve is not defective, the next step is to check the EGR solenoid for signs of damage or corrosion. If the EGR solenoid is not defective, the next step is to check the wiring for signs of damage or corrosion.
If the wiring is not defective, the next step is to check the EGR valve for signs of damage or corrosion. If the E
- P0403: Exhaust Gas Recirculation Circuit Malfunction
- P0403: Exhaust Gas Recirculation "A" Control Circuit
- P0403: EGR Flow Circuit Malfunction
- P0403: Exhaust gas recirculation (EGR) – circuit malfunction
- P0403 04: Exhaust Gas Recirculation (EGR) Control Circuit Open
- P0403 00: Voltage at the EGR valve too high or too low
- P0403 00: Exhaust gas recirculation (EGR) - circuit malfunction
See Also: Related Error Codes
Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.
- TB011312 - ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM)
VOLKSWAGEN: Update programming, mil on, faults P0299, P0403, P20EE, P229F, P2100, P0045, P2008, P24AF, P026A, and/or P050E stored in ecm fault memory - S2118000015 - ENGINE AND ENGINE COOLING:EXHAUST SYSTEM
JEEP: Malfunction indicator lamp (mil) illumination. Diagnostic trouble code (dtc) P0403 ? Egr control circuit open, set. - S2118000015 - EXTERIOR LIGHTING
JEEP: Malfunction indicator lamp (mil) illumination. Diagnostic trouble code (dtc) P0403 ? Egr control circuit open, set. - S2118000015 - EXTERIOR LIGHTING
JEEP: Malfunction indicator lamp (mil) illumination. Diagnostic trouble code (dtc) P0403 ? Egr control circuit open, set. - S2118000015 - EXTERIOR LIGHTING
JEEP: Malfunction indicator lamp (mil) illumination. Diagnostic trouble code (dtc) P0403 ? Egr control circuit open, set. - S2118000015 RevB - EXTERIOR LIGHTING
JEEP: Malfunction indicator lamp (mil) illumination. Diagnostic trouble code (dtc) P0403 ? Egr control circuit open, set. - PIE0489A - EQUIPMENT
CHEVROLET: This engineering information pi ends the need for information from the field for an mil lamp on, dtc P0403 set. - SB-10-N-001 - ELECTRICAL SYSTEM
ISUZU: Isuzu: repeating egr dtc's P042E, P0403, P0404, P0409, egr valve connector terminal spread. Technician diagnosis for dtc codes usually results in replacement of the egr valve. Investigation of returned egr valves shows that there is no f - 060604066 - ENGINE AND ENGINE COOLING:ENGINE
CHEVROLET: Lbz, lly, engine with rough idle, poor performance, black/white exhaust smoke, mil/ses light on and one or more of the following dtc's P003A, P060B, P0230, P0403, P0401, P0606, P2146, P2149, P2152, P2155. (reprogram ecm and replace egr mot - 18362 - ENGINE AND ENGINE COOLING:ENGINE
FORD: Lack of power or runs rough condition, and/or the malfunction indicator light on with egr related diagnostic trouble codes (P0401, P0402, P0403, P0404, P0405, or P0406). *tt - 1802904 - ELECTRICAL SYSTEM
DODGE: Driveability improvements mil illumination diagnostic trouble codes P0137 P0157 P0403 P0404 P0405 P0406 P2174 P2175. *tt - 1802104 - ELECTRICAL SYSTEM
DODGE: Malfunction indicator lamp (mil) illlumination diagnostic trouble codes P0401, P0403, P0404, P0405, P0406. *mj - 17505 - ENGINE AND ENGINE COOLING:ENGINE
FORD: Runs rough and/or malfunction indicator lamp (mil) on condition with diagnostic trouble codes (dtcs) p402 and/or P0403 (egr flow excessive detected/egr control circuit) in wet weather or in a car wash. *tt - 1801004 - ELECTRICAL SYSTEM
DODGE: Malfunction indicator lamp (mil) illumination diagnostic trouble codes (dtc's) P0403, P0404, P0405, P0406. *tt - 03152 - ELECTRICAL SYSTEM
FORD: Diagnostic trouble codes (dtc) P0402 and/or P0403 or runs rough in wet weather conditions. *tt
2006 MERCURY MILAN
I got into the car with my one month old granddaughter and her mom and my son, the car hesitated to start, got on the expressway and tried to pick up speed and the car goes only to 55 speed and it don't pick up so i had to get off the expressway with my family because the car wasn't acting right, .Then the next thing i know the check engine light came on and the airbag came on and that tool bar on the left hand side of the dash board came on.As well as the check engine light, this is a 2006 Mercury Milan premier , i heard a lot of clicking while i was driving back home, when i tried to turn the car hesitate and another car almost hit me and my family and one month old granddaughter. I reach out to ford and was told that they didn't have any recall in the system for my car . I don't know what to do this is so wrong , these are some of the codes that has come on the car as well P0403, P0161,P0155,P0141,P0135,P0102, P0020,P0010,P0179,P1489,P0443.
VEHICLE SPEED CONTROL, POWER TRAIN ELECTRICAL SYSTEM
2004 FORD F SUPER DUTY with 40000.0 miles
Lack of power or runs rough condition, and/or the malfunction indicator light on with egr related diagnostic trouble codes (P0401, P0402, P0403, P0404, P0405, or P0406). Engine and engine cooling:exhaust system:emission control:gas recirculation valve (egr valve).
ENGINE, POWER TRAIN ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)