What is the diagnostic code for excessive EGR?
It is one of the generic diagnostic trouble codes in a number of makes and models that are related to the vehicle’s EGR. Code P0402 indicates that your car computer has detected excessive EGR.
What is the diagnostic code for exhaust gas recirculation?
P0402 OBD-II Trouble Code: Exhaust Gas Recirculation Flow Excessive Detected. Cost of diagnosing the P0402 code. P0402 is a diagnostic trouble code (DTC) for “Exhaust Gas Recirculation Flow Excessive Detected”.
What causes the p0402 code on an EGR?
Code P0402 is triggered when the EGR temperature sensor sees more of a temperature change than the EGR has commanded to open. This is usually caused by the EGR backpressure control valve getting a burnt diaphragm from the exhaust backpressure over time or from a partly blocked catalyst. Need help with a P0402 code?
How is exhaust gas recirculation ( EGR ) test done?
In an EGR system there is a pipe which comes off the exhaust manifold. The first EGR system tests you should perform are EGR idle tests. Both tests involve leaning the engine at idle by allowing exhaust gas to enter the engine through the EGR system. Apply vacuum to the EGR valve at idle.
It is one of the generic diagnostic trouble codes in a number of makes and models that are related to the vehicle’s EGR. Code P0402 indicates that your car computer has detected excessive EGR.
P0402 OBD-II Trouble Code: Exhaust Gas Recirculation Flow Excessive Detected. Cost of diagnosing the P0402 code. P0402 is a diagnostic trouble code (DTC) for “Exhaust Gas Recirculation Flow Excessive Detected”.
Code P0402 is triggered when the EGR temperature sensor sees more of a temperature change than the EGR has commanded to open. This is usually caused by the EGR backpressure control valve getting a burnt diaphragm from the exhaust backpressure over time or from a partly blocked catalyst. Need help with a P0402 code?
In an EGR system there is a pipe which comes off the exhaust manifold. The first EGR system tests you should perform are EGR idle tests. Both tests involve leaning the engine at idle by allowing exhaust gas to enter the engine through the EGR system. Apply vacuum to the EGR valve at idle.