P203A OBD Error Code: Problem & Solutions

All the leftover exhaust particles are converted into harmless gases with the assistance of the Diesel Exhaust Fluid (DEF). How this happens is by increasing the temperature of the exhaust system, this helps to burn off those particles. Here’s where the DEF comes into the picture, the DEF fluid is injected into the exhaust stream which increases the temperature of the Diesel Particulate Filter. It is then able to convert the gasses and water. Any leftover NOx is reduced by adding the Reductant Catalyst (SRC). The PCM comes to know how much of the DEF is present in the tank via the Reductant Level Sensor. The Discrete level sensor measures the tank level at three different heights, and the reductant level is measured based on how much liquid reductant is present. Which makes the frozen reductant undetectable. Hence the measured lever is used to calculate the exact quantity of reductant in the tank.

What causes this problem with the Reductant Level Sensor Circuit?

• Damaged Reductant level sensor
• The DEF tank has incorrect fluid in it
• Presence of an electrical short

1. Engine wiring connectors - All connectors need to be inspected, sometimes the codes are set not because of a faulty sensor or components but connectors. You can repair or replace them online with us. Order from the convenience of your home and have it delivered to you right to your doorstep!
2. Temperature sensor - Measures the temperature of the fuel and helps the PCM regulate the components easily. A fault temperature sensor can make the whole system go haywire. Correct it through replacements and check if the P203A code goes away, otherwise go for replacement. We offer free shipping on orders over $99.
3. Catalytic converter - Helps to convert all the toxic gases as well as pollutants in exhaust gas coming from the engine into less-toxic pollutants by catalyzing a redox reaction. This can very well cause the P203A code to set, so ensure it’s working properly. You can go for repair or replacement depending on the damages present. Order from PartsAvatar and track your shipment the whole way till it reaches you.
4. Powertrain Control Module - The brain of your vehicle, that monitors all the other modules and components. The PCM replacement would require reprogramming, so make sure repairs can’t fix the problem. You can pick the right PCM fitment for your vehicle on our website. It’s easy to search and out 24/7 customer care executive can help you online too.
5. Exhaust system - Is mainly the piping which is used to guide exhaust gases away from a controlled combustion inside an engine. If you have noted any issues, you can try to repair them first and see if that helps get rid of the P203A code. If not, go for replacement with PartsAvatar. We ship to the remotest corners of Canada from our warehouses.
6. Exhaust Gas Temperature sensors - Is basically a meter that’s used to monitor the exhaust gas temperature of the combustion engine of the vehicle. You can try to repair the damages you have found or replace it with PartsAvatar. Order online easily today!

Have you ever wondered why is it so important to know the symptoms of the problem? Well, it is extremely essential to know the symptoms of the problem in order to detect it. Keeping this in mind, let’s throw some light on few common symptoms of OBD error code P203A

Common Symptoms

• Wrong reading of the level of DEF (Diesel exhaust fluid)
• The exhaust emissions aren’t within the specifications
• Check Engine Light is illuminated
• Increased smoke present
• Warning related to DEF present in the instrument cluster 

To correct this P2030A code you might need to undergo few replacements for the defective parts such as:

• Repair or replace the damaged engine wiring and connectors
• Repair or replace the PCM
• Repair or replace the Exhaust system components
• Repair or replace catalytic converter
• Repair or replace the temperature sensor

If you need any parts to fix this problem you can easily find them with us. Not only that we also have in stock the best in range auto parts and that too at the most budget friendly prices ever online. Whether you need a Connectors, temperature sensor, catalytic converter, PCM, exhaust gas, exhaust system, EGT sensors, you can simply rely on us for quality auto parts.

Here are some steps which you should follow in order to diagnose this P203A fault code:

Start by doing basic pooling of information. Research the Technical Service Bulletins (TSB) for any issues you already knew were present. Make sure you match the TSB exactly to your vehicle's make, model, year of manufacture and engine. In case you feel you won’t be able to manage doing the diagnosis on your own, you can always take assistance from a trained diagnostician or mechanic.

Step 1: Connect your scanner to the vehicle diagnostic port and retrieve all the codes. Now clear the codes and go on a test drive. Make note of all the codes that have set and freeze frame the data. The diagnosis has to be done for all the codes that are now present.

Step 2: Using the technical service bulletins and a reliable information source for your vehicle locate the Diesel Exhaust fluid storage tank. Once you have successfully located it, using a dipstick manually measure the level of the fluid. Top up the fluid and move on to the next step.

Step 3: If you find that the level is still showing low after filling the DEF tank, then there’s an issue with the reductant level sensor. You will need to replace it and this may help get rid of the P203A code. Remember that replacing the sensor is tricky as it is mounted to the tank, ensure you catch any of the DEF which may come out while replacing it.

Step 4: Check the electrical connection of the reductant level sensor connector. To know the specific values and procedures for testing the level sensor you can refer the service data for the specific vehicle. This will be there in the TSB. You can use a multimeter to test resistance levels. If the values aren’t as needed by the manufacturer you will have to go for replacement of sensor.

Step 5: Now it’s time to inspect the reductant level sensor wiring harness for any damages. You may find chafed or burned wires. All the bare wires will need to be repaired, you can also replace them if you feel that would resolve the matter properly. Also, keep in mind that the repairs should last. Now move on to the harness and ensure that it’s fastened safely and not close to the moving parts.

Common Mistakes When Diagnosing the P203A Code

• Not following the diagnostic steps in order
• The Diesel Exhaust Fluid tank is not functional