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.
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
What does the PCM do for a p0401?
For a P0401 (insufficient flow) or P0402 (excessive flow) the PCM will monitor the following components during the test sequence shown above: 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.
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?
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.
What does p0316 mean in Powertrain Control Module?
This P0316 code means the powertrain control module (PCM) has detected a misfire shortly after startup, specifically within the first 1,000 revolutions.
What causes a p0316 engine misfire on startup?
Rough engine start or idle Potential causes of this misfire code may include: Damaged or defective Crankshaft Position Sensor (CKP) CKP sensor wiring or connector fault Ignition system malfunction Fuel system malfunction: injector or fuel pump Mechanical engine problem
What are the symptoms of a p0316 DTC?
Symptoms of a P0316 DTC may include: MIL (Malfunction indicator lamp) illumination Rough engine start or idle Potential causes of this misfire code may include: Damaged or defective Crankshaft Position Sensor (CKP) CKP sensor wiring or connector fault Ignition system malfunction Fuel system malfunction: injector or fuel pump
What is the diagnostic code for Mazda BT-50 p0406?
Mazda BT-50 P0406: EGR Sensor “A” → Circuit High May 8, 2019by Jason P0406is a generic OBDII Diagnostic code. It deals with the signal coming from the EGR system.
What does the OBDII diagnostic code p0406 mean?
P0406is a generic OBDII Diagnostic code. It deals with the signal coming from the EGR system. In this case, it means that the signal coming from the EGR system is higher than the specified range Since it is a generic code, it has the same meaning for the Mazda BT-50as it would any other vehicle.
What causes a p0406 circuit to short out?
Potential causes of a P0406 code include: EGR sensor signal circuit shorted to B+ (battery voltage) EGR sensor signal circuit shorted to the 5 volt reference circuit to EGR. EGR sensor ground circuit open.
How much does it cost to repair a p0406 Mazda engine?
The cost of diagnosing the P0406 MAZDA 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. Most auto repair shops charge between $75 and $150 per hour.
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”.
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
How much does it cost to repair Ford p0402?
The cost of diagnosing the P0402 FORD code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
For a P0401 (insufficient flow) or P0402 (excessive flow) the PCM will monitor the following components during the test sequence shown above: 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.
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