P046C - OBD Trouble Code

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OBD error code P046C is a generic error code that indicates some problem with your vehicle’s egr sensor A circuit. Now, you must be wondering what is this problem and how does that matter when it comes to your vehicle’s performance? Another question that might be haunting you must be how serious is this problem? Well, to get your answers to all these questions you will need to go through the subsequent sections

OBD code P046C will be set by your vehicle’s PCM/ECM also known as the powertrain control module/engine control module when it detects that there is low voltage from the exhaust gas recirculation sensor “A” circuit. Wondering what causes this rich condition? Go through the causes mentioned below:

What causes this problem with the Exhaust Gas Recirculation Sensor "A" Circuit Range/Performance?

• Problematic EGR volume control solenoid valve
• Egr valve carbon build-up
• Open or shorted egr volume control solenoid valve harness
• Low electrical connections
• Problematic egr temperature sensor and its related circuit

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3. Engine Control Module - OBD error code P046C flashing? There is a chance that your ECM, itself is damaged and is demanding for a quick change. So, what are you waiting for? Buy a new one with us now.
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5. Powertrain Control Module - PCM if damaged can be really problematic. So, we advise you to undergo PCM replacement as soon as possible, if found damaged. Worried about the cost? Well, you no longer need to worry about that as we have for you best priced PCM’S in stock.
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If you are facing OBD error code P046C, then there are significant common symptoms that can be felt or observed. We have worked out a list here to help you out in understanding this problem better.

Common Symptoms

• Illumination of check engine light
• Appearance of related error codes such as egr sensor failure codes
• Low egr sensor voltage
• Engine stalling
• Rough idling
• Ping form detonation when on high RPM or under load

To correct this issue, you might need to undergo few replacements for the defective parts such as:

Repair or replace EGR Valve and other related parts if found damaged.

Apart from the EGR valve, you might need to undergo few more replacements. You might need

EGR Solenoids, Engine Control Module, EGR Sensor Connector, Powertrain Control Module and many other parts. Where to get them from? Well, if you want quality parts, then we can prove to be your dream destination.

Here are some steps which you should follow in order to diagnose this P046C fault code:

• As we already know that obd error code P046C indicates low voltage error with the EGR sensor connector, circuit A. Keeping this in mind, you will need to first of all check for any corrosions, broken terminals or loose connections. If you come across any corrosion, try cleaning it and resetting the connector after that.
• Now, discharge the electrical connector and also the EGR. Check the EGR intake and exhaust for any blockage or clogging. Clean the junk as required for the smooth pintle functioning.
• Also check the egr vacuum lines to the solenoid and replace/repair it if found damaged.
• In case you own a Ford, you will need to check the two vacuum hoses from the EGR to the differential pressure feedback EGR sensor, also known as the DPFE in the exhaust manifold rear.
• Inspect the hoses for any corrosion. Make use of a screwdriver to remove the corrosion from the hoses and the sensors. This will make it function again.

Common Mistakes When Diagnosing the P046C Code

Few of the common mistakes that you can commit while diagnosing this P046C generic obd codes are listed as follows:

• Failing EGR valve
• Failing Powertrain Control Module (PCM)
• Wiring failures