What does EGR flow excessive mean?

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 causes code P0405?

Code P0405 is triggered when the EGR position is below the ECM expected sensor position and the most common cause is the EGR sensor has an open circuit internally.

How much is a EGR valve?

It will cost you between $150 and $700 to get your EGR valve replaced by a mechanic. If you’re interested in just getting the parts on your own, you can head to AutoZone and buy a new one at prices that range from as low as $40 to as high as $500.

Can EGR cause rich condition?

EGR Valves allow burnt exhaust gases to reenter the intake manifold, causing a rich fuel condition by reducing the amount of oxygen.

What causes the p0442 trouble code on a Toyota Camry?

There are many things that can cause the P0442 trouble code on the Toyota Camry. The most common problem is far and away the first one listed below. EVAP Canister Purge Valve – The most common culprit with the P0442 trouble code and the Toyota Camry is going to be the vapor canister purge valve.

What is the trouble code on a Toyota Camry?

One of the most common trouble codes with all Toyota vehicles is the P0420. This code number references a number that is given to you when you plug your Toyota Camry into a OBDII scanner. It doesn’t matter which model you have, this OBDII code has the same meaning for all of them. P0420 is a OBDII trouble code. The code technically stands for:

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.

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.

What does EGR flow excessive Mean?

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 causes P0402 code?

Code P0402 is often set when the EGR monitoring criteria are excessively triggered—triggers include too much Manifold Pressure change, too much Oxygen sensor change, and too much EGR Temperature change.

How to Fix a P0402 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 fix P0402 code?

What does the code p0402 mean on an engine?

P0402 is an OBD-II generic code that the engine control module (ECM) has detected indicating the engine exhaust gas recirculation (EGR) valve is flowing too much recirculated exhaust gases when it is commanded to open the flow of gases into the intake manifold.

Is there a problem with the EGR valve p0402?

With a P0402, 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 Related EGR codes: P0400, P0401, P0403, P0404, P0405, P0406, P0407, P0408, P0409

What is the diagnostic code for excessive EGR flow?

There is another diagnostics connector in the engine compartment that will not fit the OBDC-II scanner tool, and you may have to point the technician to the proper connector (like I did) if you take it to a place like AutoZone. If the code is P0402, the diagnosis is excessive EGR (exhaust gas recalculation) flow.

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”.

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.