When to use the Check Engine light p0402?
When to use the Check Engine light p0402?
EGR is only needed in limited amounts under certain driving conditions. If the PCM detects that there is excessive EGR flow, it may turn on the check engine light and trigger code P0402.
What was the cause of the p0402 gas leak?
P0402 – Exhaust gas recirculation (EGR) system -excessive flow detected Trouble Code Fault Location Probable Cause P0402 Exhaust gas recirculation (EGR) system – Hose leak/blockage, basic setting not ca
What does the DTC p0402 stand for?
Diagnostic Trouble Code (DTC) P0402 stands for Exhaust Gas Recirculation “A” Flow Excessive Detected. It indicates that the powertrain control module (PCM) has detected 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.
What is the p0402 code on a Ford F-150?
It’s important to note that code P0402 is often set in Ford vehicles (especially on a Ford F-150) that use a differential pressure feedback EGR (DPFE) sensor to determine how much EGR is flowing. Aside from Ford, users have also reported P0402 in Toyota, Nissan, Peugeot, and Lexus vehicles.
Is this an EGR valve problem?
Symptoms Of A Bad EGR Valve Subpar Engine Performance. As the EGR valve monitors the volume of exhaust gases entering the engine, it is obvious that any issue with it will affect the engine performance. The Engine Warning Light Comes On. Seems so obvious! The Engine Does Rough Idling. Smell Of Fuel. Failed Emission Test.
Why do I keep getting code p0402?
- Excessive Vacuum signal or Electrical signal to the EGR Valve
- The EGR Valve is defective and is opening too far or not properly closing
- Malfunctioning EGR Vacuum supply solenoid
What does EGR stuck open mean?
Exposure to water and heat from the engine compartment typically leads to EGR valve failure. If the EGR valve becomes stuck in the open position, it eventually will cause a vacuum leak . If stuck in the closed position, the nitrogen oxides will rise and the fuel mixture will ignite before reaching the “explosion” section in the cylinder.
What is the purpose of an EGR valve?
The function of the EGR valve is to recirculate small amounts of exhaust back into the combustion chambers of the engine in order to decrease the combustion temperature, thereby reducing the formation of smog-producing nitrogen oxides. EGR valves can malfunction by becoming stuck open or closed due to carbon buildup.
