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Robyn Carter Posted on May 17, 2016
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HOW TO FIX VEHICLE WITH OBD CODE 0650

FAILED EMMISSION TESTING WITH ODB CODES P0401 AND P0650

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Jeff Armer

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  • Pontiac Master 15,575 Answers
  • Posted on May 17, 2016
Jeff Armer
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DTC P0401 Exhaust Gas Recirculation (EGR) Flow Insufficient - Probably has plugged passages . Take the EGR valve off the vehicle an clean the passages out .

  • Jeff Armer May 17, 2016

    https://youtu.be/XgfT3kuY8lc

  • Jeff Armer May 17, 2016

    DTC P0650 Malfunction Indicator Lamp (MIL) Control Circuit . This mite be a little more difficult to solve .You would need to check for B+ voltage at the check engine light an if there is B+ voltage ,then you would need to see if the PCM can control it .
    Ignition voltage is supplied directly to the malfunction indicator lamp (MIL). The PCM controls the lamp by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the component being controlled. Each driver has a fault line which is monitored by the PCM. When the PCM is commanding a component on, the voltage of the control circuit should be low (near 0 volts). When the PCM is commanding the control circuit to a component off, the voltage potential of the circuit should be high (near battery voltage). If the fault detection circuit senses a voltage other than what is expected, the fault line status will change causing the DTC to set.

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1answer

1996 Toyota Corolla. How do I fix code P0401?

Hi Joe

Like all solenoid valves, you can clean them with throttle body cleaner and then test the solenoid electronically with a 12 volt supply.

P0401 Exhaust EGR Flow Insufficient

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P0401 : EGR Flow Insufficient on 1996 Toyota Corolla

OBD-Codes.com https://www.obd-codes.com > forums > viewtopic
Jan 20, 2007 - on EGR codes, we recommend replacing the EGR, vacuum modulator and VSV (if equipped) and cleaning out the carbon buildup to the intake from the ...
If that finds nothing wrong, remove the EGR valve and bypass tube and check them for cleanliness and blockages. If they are blocked, follow your maintenance manual's instructions for cleaning them out so you do not damage the valve, then replace them and reset the ECM.

Insufficient EGR Flow - P0401 Code - Toyota

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How do you clear a blocked exhaust when code says insuffient emisions

egr valve bad,P0401 OBD-II Trouble Code Technical Description Insufficient EGR Flow What does that mean? EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR. Symptoms You may notice drivability problems such as pinging (a.k.a. pre-ignition knock) when the engine is under load or the vehicle is at higher speeds. There may also be other symptoms. Causes A code P0401 most likely means one or more of the following has happened: The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced There is a blockage in the EGR (tube), most likely carbon buildup The EGR valve is faulty The EGR valve may not be opening due to a lack of vaccuum Possible Solutions In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit. Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open Clean out the EGR valve and/or tubing to remove deposits Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model) Replace the DPFE sensor (with a good quality / OEM one) Replace the EGR valve Related EGR codes: P0400, P0402, P0403, P0404, P0405, P0406, P0407, P0408, P0409

Read more at: http://www.obd-codes.com/p0401
Copyright © OBD-Codes.com
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2000 land rover obd II codes

https://play.google.com/store/apps/details?id=com.motordata.obd try out this (it's free), this app have got explanations for P0 ? P2 codes. Besides, I recommend to use it on an ongoing basis.
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Error code p0650

OBD II codes are specific to manufacturers and often specific vehicles. A Hyundai Accent P0650 may not be the same as a Hyundai Sonata P0650 because Hyundai loaded more diagnostic codes into the upscale Sonata.

Check with AZone or similar, they'll tell you the code description, and give you possible suspect causes to check.
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How do I fix car with code po650 emission test

this OBD code p0650 (MIL)control circuit malfuction..electrical system /you will have to take it to your dealer and have them perform a diagnostic test on your vehicle using these steps for your info

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Obd code 401

DTC's (trouble codes) are 4 digits long. I am taking it that you mean P0401.Here is a link to a page that explains the code and the possible fixes:

http://www.obd-codes.com/p0401
6helpful
2answers

Fault code p0401

This error means Exhaust Gas Recirculation Flow Insufficient Detected.

You can deatils on the following site http://www.permoveo.ltd.uk/tabid/122/OBD-Error-Code/P0401/Diagnostics/Hyundai/Default.aspx

but for convenience I have reproduced that information here:
.
Generic OBD Error Code Details for P0401 Exhaust Gas Recirculation Flow Insufficient Detected What does this mean? OBD Code P0401refers to
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR. SymptomsPossible sumptoms of OBD code P0401
You may notice drivability problems such as pinging (a.k.a. pre-ignition knock) when the engine is under load or the vehicle is at higher speeds. There may also be other symptoms. CausesPossible causes of OBD code P0401
A code P0401 most likely means one or more of the following has happened: •The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced•There is a blockage in the EGR (tube), most likely carbon buildup •The EGR valve is faulty •The EGR valve may not be opening due to a lack of vaccuum Possible SolutionsIn fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit. •Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open •Clean out the EGR valve and/or tubing to remove deposits•Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)•Replace the DPFE sensor (with a good quality / OEM one)•Replace the EGR valve Related CodesP0400 P0402 P0403
1helpful
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96 ford explorer failed emissions test with codes p0401,p0402,p0755,p0756

P0401
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.

P0402
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor (DPF). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0402 code means that OBD detected an excessive amount of EGR.

There sound like a bad EGR and need replace it.

P0755 Shift Solenoid B Malfunction and P0756 Shift Solenoid B Performance or Stuck Off. First I suggtes check leve fluids and preventive maintenance.

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