What does exhaust gas recirculation flow excessive detected?
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.
How do I fix my P0402 code?
What repairs can fix the P0402 code?
- Replacing the stuck open EGR valve.
- Replacing a broken catalyst in the exhaust.
- Replacing an EGR temperature sensor or cleaning the carbon off of it to repair it if it registers too much of a temperature change.
- Replacing the EGR backpressure control valve.
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.
Why does my Toyota p0402 keep tripping?
When a P0402 trips on a Toyota, it’s usually because the EGR valve is stuck open. This may be because something is blocking the EGR valve from closing, because the valve itself is damaged, because of excessive vacuum in the valve, or (most likely) because of a faulty DPFE sensor.
How does a mechanic diagnose the p0402 trouble code?
The Check Engine Light will be illuminated and the code is set in ECM memory. The engine could be running rough if the valve is stuck open. The engine EGR system may have exhaust leaks at the back pressure transducer. How does a mechanic diagnose the P0402 code? Scans codes and documents the freeze frame data in order to verify the problem.
Which is the opposite of p0401 in Toyota?
P0402 Code – Toyota. Excessive EGR flow. P0402 is the “Exhaust Gas Recirculation Flow Excessive Flow Detected” code, and it’s basically the opposite of a P0401 code.