Failed e-check check engine code egr solenoid valve

The symptoms of a bad EGR Valve Control Solenoid in a 1996 Toyota Corolla 1.6L include rough idling or stalling, a smell of fuel, increased fuel consumption, pinging, tapping, or knocking sounds, failed smog test, and check engine light on . If you are experiencing any of these symptoms, it is recommended to get your vehicle checked by a professional mechanic.

In terms of DIY, you can try cleaning the solenoid valve with throttle body cleaner and then test the solenoid electronically with a 12-volt supply. If that doesn't work, you can replace the EGR valve, vacuum modulator, and VSV (if equipped) and clean out the carbon buildup to the intake from the EGR valve.

Please note that if you decide to drive the car without the EGR valve and the EGR Valve Solenoid working, you can keep cancelling the code. The ECM will try and work things out and compensate. However, it is not recommended to bypass the EGR valve .

Hi there:Code 12 - Memory standby power recently lost - Possible Causes

Battery or power line recently disconnected - This code is normal if the electrical system has been worked on or the battery has recently been disconnected. It will be removed after 15 ignition switch on/off cycles.

Low system voltage, bad battery or battery terminals - If the system recently had a power drop (due to a dead battery or bad alternator), this code will appear. If the battery terminals are bad and the engine was jumped, this code will appear. See the Diagnosing Your Charging System page for more information.

Bad connection or wiring - Check the wiring and connections between the battery, power module, and logic module (or SMEC). Check all fusible links and power connectors to the battery. Clean and regrease any corroded connectors with dielectric grease and repair any shorts.

Code 32 - Logic module did not see a change in air/fuel ratio when EGR circuit was activated - Possible CausesEGR valve stuck open or closed - If the vehicle fails emmisions, then the valve may be shut. If the enigne runs poorly at low rpm or at idle, the valve may be stuck open. It may be the valve or the transducer valve. Test the transducer valve vacuum output. At idle, the transducer valve vacuum should be mostly bled, and there should be very little, if any vacuum at the output. When the engine is revved, the vacuum should increase. If the transducer is functioning properly, replace the EGR valve.

Bad EGR solenoid or Canister purge/EGR solenoid - The solenoid is located in the right, front fender next to one to three other solenoids. See the Understanding Solenoids page for information about how to test and repair solenoids.

Bad connection or wiring - Check the wiring and connections between the solenoid and the logic module (or SMEC). Clean and regrease any corroded connectors with dielectric grease and repair any shorts.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Code 12 - Memory standby power recently lost - Possible Causes
Battery or power line recently disconnected - This code is normal if the electrical system has been worked on or the battery has recently been disconnected. It will be removed after 15 ignition switch on/off cycles.



Low system voltage, bad battery or battery terminals - If the system recently had a power drop (due to a dead battery or bad alternator), this code will appear. If the battery terminals are bad and the engine was jumped, this code will appear. See the Diagnosing Your Charging System page for more information.


Bad connection or wiring - Check the wiring and connections between the battery, power module, and logic module (or SMEC). Check all fusible links and power connectors to the battery. Clean and regrease any corroded connectors with dielectric grease and repair any shorts.




Code 32 - Logic module did not see a change in air/fuel ratio when EGR circuit was activated - Possible Causes
EGR valve stuck open or closed - If the vehicle fails emmisions, then the valve may be shut. If the enigne runs poorly at low rpm or at idle, the valve may be stuck open. It may be the valve or the transducer valve. Test the transducer valve vacuum output. At idle, the transducer valve vacuum should be mostly bled, and there should be very little, if any vacuum at the output. When the engine is revved, the vacuum should increase. If the transducer is functioning properly, replace the EGR valve.


Bad EGR solenoid or Canister purge/EGR solenoid - The solenoid is located in the right, front fender next to one to three other solenoids. See the Understanding Solenoids page for information about how to test and repair solenoids.


Bad connection or wiring - Check the wiring and connections between the solenoid and the logic module (or SMEC). Clean and regrease any corroded connectors with dielectric grease and repair any shorts.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.


Thank you for using FixYa, have a nice day.

Hi there:
Code 12 - Memory standby power recently lost - Possible Causes
Battery or power line recently disconnected - This code is normal if the electrical system has been worked on or the battery has recently been disconnected. It will be removed after 15 ignition switch on/off cycles.


Low system voltage, bad battery or battery terminals - If the system recently had a power drop (due to a dead battery or bad alternator), this code will appear. If the battery terminals are bad and the engine was jumped, this code will appear. See the Diagnosing Your Charging System page for more information.


Bad connection or wiring - Check the wiring and connections between the battery, power module, and logic module (or SMEC). Check all fusible links and power connectors to the battery. Clean and regrease any corroded connectors with dielectric grease and repair any shorts.




Code 32 - Logic module did not see a change in air/fuel ratio when EGR circuit was activated - Possible Causes
EGR valve stuck open or closed - If the vehicle fails emmisions, then the valve may be shut. If the enigne runs poorly at low rpm or at idle, the valve may be stuck open. It may be the valve or the transducer valve. Test the transducer valve vacuum output. At idle, the transducer valve vacuum should be mostly bled, and there should be very little, if any vacuum at the output. When the engine is revved, the vacuum should increase. If the transducer is functioning properly, replace the EGR valve.


Bad EGR solenoid or Canister purge/EGR solenoid - The solenoid is located in the right, front fender next to one to three other solenoids. See the Understanding Solenoids page for information about how to test and repair solenoids.


Bad connection or wiring - Check the wiring and connections between the solenoid and the logic module (or SMEC). Clean and regrease any corroded connectors with dielectric grease and repair any shorts.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.


Thank you for using FixYa, have a nice day.

I am not surprized. The chances that replacing an EGR valve will fix a code P0401 on ANY Ford vehicle is about 1/2 of 1 percent. You most likely either have clogged up EGR ports in your intake manifold, or you have a defective Delta Pressure Feedback EGR (DPFE) sensor.

To find out which it is, apply vacuum to the EGR valve vacuum port with the engine idling. The engine should stumble and/or stall. If it does not, your ports are clogged. If it does, the most likely cause of your problem is the DPFE sensor. However, the EGR vacuum control solenoid could also be the cause.
You cannot properly test the EGR vacuum control solenoid without the proper equipment, but you can check to make sure that there is manifold vacuum going into one side of the solenoid and you can check to make sure that there are no breaks or leaks in the line that runs between the solenoid and the valve. If you find any of these, repair as necessary. If you do not find a problem with the vacuum lines, then you can take a "guess" and replace the DPFE. If this does not work, then you can "guess" again and replace the solenoid. If it still does nort work, then you probably have a bad electrical circuit to the solenoid (once again, requiring the proper equipment to diagnose).

Please also review the following article: What Else Could Be Wrong?

CODE P1406 - EGR VALVE PINTLE POSITION CIRCUIT MALFUNCTION CONDITIONS. POSSIBLE CAUSES EGR SOLENOID VALVE IS BINDING OR STICKING. EGR SOLENOID CONTROL CIRCUIT IS OPEN SHORTED TO GROUND OR TO B+. EGR SOLENOID POWER CIRCUIT IS OPEN CHECK THE ECS 10AMP FUSE.EGR SOLENOID FAILED. PCM HAS FAILED.

for p0401:
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.

CODE PO402 EXHAUST GAS RECIRCULATION SYSTEM EXCESSIVE FLOW DETECTED.POSSIBLE CAUSE EGR PIPE IS CLOGGED RESTRICTED.OR EGR SOLENOID VALVE CLOGGED OR FAILED.

YOU NEED TO DISCONNECT THE BATTERY FOR 5-10 MINUTES FOR FAULTS TO CLEAR COMPLETELY..HAVE SEEN THIS PROBLEM BEFORE AFTER REPLACING AN EGR VALVE..IT WAS A TECH TIP FROM CHRYSLER ENGINEERING..THE EGR VALVE WAS THE PROBLEM,BUT THE PCM WOULD NOT LET THE CODES GO EVEN AFTER CLEARING THEM WITH SCAN TOOL..ALSO CHECK CONNECTIONS AT EGR CONNECTOR FOR SPREAD PINS

just replace the egr solinoid