P20C0 - OBD Trouble Code

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Is the Check Engine Light illuminated on the instrument panel of your car? Is your vehicle’s engine giving you some performance issues? If your answer is “YES” then there is a possibility that your vehicle is indicating a fault with the reductant heater B control circuit being high, and this is diagnosed as an OBD P20C0 error code. To know more about this error code P20C0 and its few common causes and symptoms take a look at the sections below.

You won’t believe that the exhaust gas recirculation system, also known as the EGR system was introduced to keep a check on NOx production in your vehicle to meet government emission rules. Wondering what this error code P20C0 has to do with your vehicle’s reductant heater control circuit and egr system? Well P20C0 indicates that your car’s PCM has detected a high voltage in the control circuit for the reductant heater for the control circuit B. To know more about this error code and few of its common causes, take a look at the sections below.

What causes this problem with the Reductant Heater B Control Circuit High?

• Bad or damaged reductant heater
• Open or shorted reductant heater harness
• Poor reductant heater circuit electrical connections

1. Powertrain Control Module - A faulty powertrain control module can be very detrimental for your vehicle’s health. It can create issues such as stalling while running or failing to start condition. If you need to get rid of these issues you can replace your bad PCM with a new one today with us and get rid of this OBD error code P20C0.
2. Reductant Tank Heater - Having a well-functioning reductant tank heater is extremely essential to make sure that diesel exhaust fluid does not freeze in extreme cold temperature. If you have a damaged one in your vehicle, we recommend you to change them at the earliest and also get rid of this error code P20C0.
3. EGR System & Parts - Decrease engine power and acceleration reflect towards a faulty egr system. If you are experiencing these symptoms with your vehicle, then don’t think twice and replace the faulty the egr system parts today.
4. Diesel Particulate System & Parts - As we all know that the diesel particulate filters and other related parts are responsible for filtering the harmful carbon particulates produced in the combustion, so you definitely can’t go with a wrong one. Replace the faulty ones today and say bye to OBD error code P20C0.
5. Catalytic Converter - Care for your environment and do your bit in reducing the air pollution by installing a well-functioning catalytic converter in your vehicle. Undergo faulty cat converters replacement today get rid of OBD error code P20C0.
6. Diesel Exhaust Fluid - Low diesel exhaust fluid level? Yes? It will lead to a loss in DEF effectiveness if the diesel exhaust fluid is bad. Replace the dirty diesel exhaust fluid as soon as possible to get rid of this error code P20C0.
7. Glow Plug Control Module - Glow plug control modules are responsible for controlling and monitoring the well-functioning of the glow plugs in your vehicle. Make sure you have a well-functioning glow plug module installed in your car

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P20C0 code by mentioning some major symptoms below:

Common Symptoms

• Fall in vehicle’s overall performance
• Decline in vehicle’s engine health
• Black emissions from vehicles exhaust
• Fall in fuel economy
• Occurrence of other SCR error codes

Have a look at some ways with which you can correct the P20C0 code:

• To start with, you will need to undergo faulty reductant heater replacement
• Inspect and repair or replace all the open or shorted reductant heater wires and connectors
• Make sure that you undergo fixing the electrical connections for the reductant heater B control circuit
• Fix or replace the faulty catalytic converters and other related exhaust parts
• Make sure that your vehicle’s control modules - glow plug control modules and powertrain control module are in best shape, if not, then undergo their replacement at the earliest

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of Diesel Exhaust Fluid, Powertrain Control Module, Glow Plug, Reductant Heater and a lot more. We are sure that now all your issues would be resolved.

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

• To start your diagnosis, you will need to get hold of a diagnostic scanner, digital volt/ohmmeter and a reliable source of vehicle diagnostics.
• It will be really helpful if you could get hold of technical service bulletin (TSB) specific to your vehicle. Believe us it will prove to be extremely helpful for you in your diagnosis process. While choosing a TSB, make sure that it matches your vehicle year, make, and model and also the engine size.
• To begin your diagnosis, undergo a complete visual inspection of your vehicle’s reductant heater B control Circuit and related harnesses and connectors.
• Make sure the wires and connectors are not burnt or damaged, in case they are you will need repair or replace them
• Now, connect the diagnostic scanner to the diagnostic port of your vehicle and restore all the store codes and freeze the frame data. Not the information and clear all the codes.
• Next step is to test drive the vehicle till the vehicles PCM enters the readiness mode or the code is reset. In case of an intermittent code, it will be more difficult to diagnose it as the condition which set this code needs to be worsen in order to diagnose this code.
• In case the code resets itself, then you will need to look into the vehicle information source to get the diagnostic flow charts flow charts, connector pin out charts, connector face views, as well as component testing procedures and specifications.
• You will need this information to move on to the next diagnosis step. Make use of the DVOM to check the power supply to the SCR control system.
• Also, check the fuses with loaded circuit to avoid a sort of misdiagnosis.
• In case you discover inappropriate power or voltage, then you will need to test the output control circuit voltage. If this voltage turns out to be insufficient then check if the controller is bad or is facing any programming error.
• In case the voltage output circuit turns out to be within the needed parameters, then use the DVOM to check the reductant heater element for B control circuit. You can consider as failed if the heater fails to meet manufacturer’s specifications.

Common Mistakes When Diagnosing the P20C0 Code

When you undergo error code P20C0 diagnosis, few misdiagnoses are common. In order to make sure that you don’t commit any, make sure to keep an eye on the following failures:

• Failing glow plug control module
• Failing reductant tank heater
• Troublesome wiring