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?
What causes excessive flow in an EGR valve?
Bad Gasket Another common cause of excessive EGR flow has to do with the gasket used to create an air-tight seal between the EGR valve and its mounting surface. Although EGR gaskets consist of heavy-duty and heat-resistant materials, they may develop cracks and other problems as time goes on.
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 causes a p040x code on an intake manifold?
A malfunctioning EGR system will cause several codes such as P0400 or P0401-P0409 to be displayed. Often a P040x code is caused by a blockage in the EGR system and is not caused by a failed component. Most common problem – carbon blockage where the EGR valve connects to the intake manifold
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?
What’s the problem with the EGR valve on my F-150?
Have an F-150, 2002 year, 54k miles and just replaced the EGR valve. But still getting errrors for both: P0401 Insufficient EGR Flow P0402 EGR Flow Excessive at Idle What would fix both an insufficient and excessive flow?… I have an interestingly annoying problem.
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 causes too much pressure in the EGR system?
The EGR temperature sensor is registering too much of a temperature change when the EGR valve is opened from a partly blocked exhaust catalyst causing excessive back pressure in the EGR system.
What are the symptoms of the p0402 OBD-II trouble code?
What are the symptoms of the P0402 code? 1 The Check Engine Light will be illuminated and the code is set in ECM memory. 2 The engine could be running rough if the valve is stuck open. 3 The engine EGR system may have exhaust leaks at the back pressure transducer.
What’s the diagnostic code for the EGR valve?
Several technical service bulletins for a wide variety of different makes and models have documented different problems associated with the EGR valve system. With some exhaust gas issues you might set a diagnostic trouble code of PO401 or P0402.
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 are the symptoms of the P0402 code? 1 The Check Engine Light will be illuminated and the code is set in ECM memory. 2 The engine could be running rough if the valve is stuck open. 3 The engine EGR system may have exhaust leaks at the back pressure transducer.
Several technical service bulletins for a wide variety of different makes and models have documented different problems associated with the EGR valve system. With some exhaust gas issues you might set a diagnostic trouble code of PO401 or P0402.
What does excessive EGR flow on a car do?
If the code is P0402, the diagnosis is excessive EGR (exhaust gas recalculation) flow. The EGR system recalculates exhaust back to the intake manifold to lower the oxygen content of the intake gases, thereby cooling the combustion chamber, which in turn lowers NOx emissions. This is done by opening and closing an EGR valve.
How to fix the p0402 OBD-II trouble code?
What repairs can fix the P0402 code? 1 Replacing the stuck open EGR valve 2 Replacing a broken catalyst in the exhaust 3 Replacing an EGR temperature sensor or cleaning the carbon off of it to repair it if it registers too much of a temperature change 4 Replacing the EGR backpressure control valve
How to check for carbon holding the EGR valve open?
Removes EGR valve and temperature sensor to check for carbon holding the EGR valve open or the EGR bleed port not being blocked with carbon not allowing the valve to bleed off vacuum. Replacing the EGR valve without checking the EGR pressure transducer to see if it can control the EGR valve opening.
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 to do about exhaust gas recirculation in Nissan p0402?
With a P0402 Nissan, 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
The EGR temperature sensor is registering too much of a temperature change when the EGR valve is opened from a partly blocked exhaust catalyst causing excessive back pressure in the EGR system.
What does the OBD code for Nissan p0402 mean?
The P0402 Nissan code means that OBD detected an excessive amount of EGR. You may notice drivability problems such as the engine may surge off idle. There may also be other symptoms. With a P0402 Nissan, it is common for people to replace the EGR valve, only to have the problem return.
The P0402 Nissan code means that OBD detected an excessive amount of EGR. You may notice drivability problems such as the engine may surge off idle. There may also be other symptoms. With a P0402 Nissan, it is common for people to replace the EGR valve, only to have the problem return.