CAR OBD CODES
OBD/DTC Search, e.g.P0402
CAR OBD CODES P0402
P0402 OBD Code Definition:
P0402 Exhaust Gas Recirculation Flow Excessive Detected
P0402 OBD Code Description:
OBD2 Code P0402 Definition:
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor (DPF). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0402 code means that OBD detected an excessive amount of EGR.
Symptoms
Possible sumptoms of P0402
You may notice drivability problems such as the engine may surge off idle. There may also be other symptoms.
Possible Causes
Possible causes of P0402
A code P0402 most likely means one or more of the following has happened: The DPFE (differential pressure) sensor is faulty and needs to be replaced There is a blockage in the EGR (most likely carbon buildup) The EGR valve is faulty The EGR valve may not be opening due to a lack of vaccuum
Possible Solutions
With a P0402, it is common for people to replace the EGR valve, only to have the problem return. The most likely solution is to replace the DPFE sensor. Check the voltage at the DPFE sensor both at idle and when the EGR is open Replace the DPFE sensor OBD-II Codes
P0400 P0401 P0403
Note: The information on the P0402 error code is purely informative, if you need more useful information, please consult your technician.
B1409 B1B57 B2769 B0087 B2416 B1892 B2A46 B2158 B2727 B2509 B2487 B1416 B1329 B1013 B10D4 OBDII Chassis Codes
C1307 C1997 C1431 C1783 C0221 C0583 C1302 C199D C003E C1505 C1528 C1413 C1334 C2006 C1293 OBDII Network Codes
U0005 U0107 U1202 U0450 U0324 U2518 U0588 U1254 U1228 U1151 U0215 U1201 U0033 U010B U2029 OBDII Powertrain Codes
P1438 P0357 P0ACA P0A98 P0373 P02CB P2548 P1691 P0A58 P022E P0B3F P204D P0582 P0133 P2272