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?

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

What does p0400 stand for in engine control module?

All our repairs are backed by our 12-month / 12,000-mile warranty. P0400 is an OBD-II generic code that the engine control module (ECM) detected the engine exhaust gas recirculation (EGR) valve is not flowing recirculated exhaust gases when it is commanded to open the flow of gases into the intake manifold.

What does the p0405 code on the PCM mean?

What Does the P0405 Code Mean? The P0405 code indicates some problem with the Exhaust Gas Recirculation system. It is triggered when the PCM does not detect a certain degree of change in the manifold air pressure as the EGR valve activates.

How can I fix the p0405 code on my EGR valve?

To fix the P0405 code, the most common fix is to first check the wiring and connection to the sensor and the EGR valve before replacing or repairing any other component. Here are some of the fixes you can try: • Inspect the wiring to EGR sensor and ensure the connection is secure.

What does the P0420 code on a Chevrolet mean?

Code P0420 indicates that the catalytic converter is not functioning efficiently, therefore increasing the output of harmful pollutants by your Chevrolet. Chevrolet P0420 Symptoms. Check Engine Light is on; Lack of power from the engine; Decreased fuel economy; Rotten egg or sulfur smell; Chevrolet P0420 Causes. Faulty oxygen sensor

What are the symptoms of a p0405 problem?

Problem Symptoms Causes Solutions P0405 Trouble Code Check Engine Light Illuminates Engine He Damaged EGR Valve Clogged EGR pathway Fa Inspect the wiring to EGR sensor and ens

What is the EGR code for insufficient flow?

The code relates to flow from the EGR to the intake. Remove EGR and throttlebody and clean the ports with intake cleaner and a scribe or snake. Also check for leaking gaskets or lines but usualy the system is just CLOGGED with hard carbon. Remove clog and flow will return and your light will not come back on. Loading…

How much does it cost to diagnose p0402 Ford code?

Labor: 1.0 The cost of diagnosing the P0402 FORD code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour. When is the P0402 FORD code detected? High Exhaust Gas Recirculation (EGR) flow control is detected

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.

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 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.

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 EGR stand for on an OBD-2?

This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model. EGR stands for Exhaust Gas Recirculation.

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 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.

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.

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.

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 does early exhaust gas recirculation ( EGR ) system mean?

P0402 FORD Meaning Early Exhaust Gas Recirculation (EGR) systems component s include and EGR Valve, and Engine Control Μodule (ECΜ) Controlled Vacuum Switch Valve or EGR Solenoid and an EGR Vacuum Μodulator.

Why does my car not set an EGR code?

Some vehicles use this type of dual vacuum solenoid EGR control. Some EGR valves can get a piece of carbon stuck in between the pintle-shaped tip of the valve and its seat, thus causing EGR flow during improper driving conditions. This condition may not set an EGR code, but it may set misfire codes or rich running codes.

How to fix a Ford Taurus code p0402?

How do I fix code P0402 FORD Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. P0402 FORD Tech Notes There is a factory service bulletin for the following Ford models: 2000-2002 Ford Taurus

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 difference between p0401 and P0 402?

Whereas a P0401 means there is too little exhaust gas recirculation (EGR) happening, a P0402 means there is too much. This results in an overly-rich mixture of oxygen in the fuel/air mix and – as a result – higher engine temperatures.

What causes the EGR temperature sensor to get stuck?

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. The EGR is stuck open due to binding or carbon deposits holding the valve open. What are the symptoms of the P0402 code?

What happens when the EGR valve is opened?

MAP sensor – if the EGR valve is vacuum controlled the PCM will read changes in the MAP sensor output in response to exhaust gas recirculation. The voltage from the MAP should increase when the EGR valve is opened. Above is a diagram of an exhaust gas recirculation system (Ford with DPFE).

Why is the EGR valve not opening at idle?

The EGR valve may not be opening due to a lack of vaccuum 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

What to look for in a Ford p0402?

Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. What does this mean? The cost to diagnose the P0402 FORD code is 1.0 hour of labor. The auto repair’s diagnosis time and labor rates vary by location, vehicle’s make and model, and even your engine type.

What kind of trouble code is p0402?

The check engine light on my 2000 Ford Taurus 24 Valve DOHC V6 came on and after scanning with an OBD2 Scan Tool, I received an P0402 (excessive EGR flow). I replaced the DPFE sensor and , since the car was ‘missing’, I also replaced the spark plugs (the car has 40K miles).

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

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 causes the p0402 code on an EGR?