What causes the p0401 code on a Toyota Camry?
Diagnosing what is causing the P0401 code in the Camry is typically not very tricky. Here are the most common causes: Blocked EGR Tube – The tube that carries the exhaust gases back to the motor may clog up over time. Alternatively, it can become bent or kinked.
What is the EGR code on a Toyota Camry?
They are the EGR Valve, Differential Pressure Sensor, and the Actuator Solenoid. P0401 is a general code, which means that regardless of the year (1996+ anyway) and the model, it’ll have the same meaning regardless of which manufacturer built the vehicle (Toyota Camry or not).
Why does my Chevy Captiva have a p0401 code?
EGR Valve Itself is Bad – The EGR valve itself is usually not going to be the place to start. But, they certainly are the cause of P0401 often enough. Vacuum Issues – The EGR valve relies on engine vacuum to operate. So, if you are encountering P0401 and other codes, the P0401 may be a symptom of larger problems.
What causes a Mil p0401 to not work?
The only thing that i can find that would cause a MIL p0401 at this point is the sensor sending an incorrect reading of the EGR’s correct function, which should be a EGR temperature sensor (thermistor). But I cannot find any such sensor on the manifold, or in any repair diagrams.
What does the EGR error code p0401 mean?
In the shop’s defense, replacing your EGR valve probably would eliminate the error code, turn off the CEL, and allow you to pass emissions inspection. One thing is certain: the P0401 error code specifically means you have “reduced flow” in your exhaust gas recirculation system.
Which is the opposite of p0401 excessive EGR flow?
Excessive EGR flow. P0402 is the “Exhaust Gas Recirculation Flow Excessive Flow Detected” code, and it’s basically the opposite of a P0401 code.
Why do I get a p0402 trouble code?
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. Thus, replacing the EGR valve should not be the first thing done to attempt a repair when a P0402 trouble code is given.
What to do if your EGR valve is insufficient?
Most folks see P0401 Insufficient EGR flow, look up the price of an EGR valve, see how cheap it is and just throw a new one on. That can be a mistake. That’s because the EGR valve is not always going to be the culprit. Here are some of the most common fixes to help clear the P0401: