P203C - OBD Trouble Code
OBD Code P203C - Reductant Level Sensor Circuit Low
So,
the check engine light is on and you’re panicking about this OBD-II Code that
has been set in your vehicle. Well, don’t worry we have you covered, you can
know all about the P203C code and how to diagnose it easily here. This code is
defined as a Reductant Level Sensor Circuit Low and is set by the Powertrain
Control Module (PCM) of your vehicle when it sees an issue with the Reductant
Level Sensor.
Learn More About OBD Error Code P203C
There’s a discrete level sensor in your vehicle which is responsible for measuring the tank level of 3 different heights. The frozen reductant can’t be detected through this sensor as it can detect reductant in the liquid state only. Inorder to update the calculation of the remaining quantity of reductant present, measured level will be used.
The level sensor contains four superior quality stainless steel pins, each pins length defines the level of the tank in terms of height which has to be checked. All of these pins can be used for evaluation as the fourth one is used as ground pin. The urea is then used to determine if the tank is below or above the sensor position of the respective sensor as it has electrical conductivity feature.
Engine Control Unit (ECU) is hence able to directly evaluate this information and ensure everything is running fine, if not it will proceed to setting the P203C code. The check engine light will be illuminated as well once the code is set.
What causes this problem with the Reductant Level Sensor Circuit Low?
- Reductant level sensor damaged
- Incorrect fluid present in the DEF storage tank
- Electrical short present
Replace/Repair These Parts To Fix Code P203C
- Engine wiring
connectors - Engine wiring connectors are electronic components that
can cause great issues if not repaired or replaced. Inspect them and see
if the code goes away after repairs, otherwise you will have to go for
replacement. Order online for replacement from the convenience of your home and
have it delivered to you right to your doorstep!
- Temperature sensor - Has the job of of
measuring the temperature of the fuel,this in turn helps the PCM module
regulate the other components of the vehicle easily. A fault in the temperature
sensor can make the whole system go haywire. Repair or replace them and check
if the P203E code goes away. You can get free free shipping on orders over $99
from PartsAvatar.
- Catalytic converter - Has the job of
converting the toxic gases as well as
pollutants in exhaust gas coming from the engine into less-toxic pollutants by
catalyzing a redox reaction. This could have been the reason you have the P203E
code to set, so ensure it’s working properly. Repair or replace considering the
damages present. Order from PartsAvatar and track your shipment the whole way
till it reaches you.
- Powertrain Control
Module - It is the
significant module of your vehicle which monitors all the other modules and
components. The PCM replacement would be expensive and also require
reprogramming from a professional diagnostician. Try to repair and fix the
problem. If you opt for replacement then 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.
- Exhaust system - Is the piping which
is used to guide exhaust gases away from a controlled combustion inside an
engine. Try to repair the damages present first and see if that helps get rid
of the P203E code. If not, go for replacement with PartsAvatar. We ship to the
remotest corners of Canada from our warehouses. So don’t worry about where you
are located.
- Exhaust Gas
Temperature sensors - Is the meter which used to monitor the exhaust gas
temperature of the combustion engine of the vehicle. Try to repair the damages
or replace it with PartsAvatar. Order online easily today!
- Exhaust gasket - Includes all the
metal components whose job is to collect exhaust gases and transport them to the
exhaust for removal from the tailpipe. Find the perfect fit for replacement at
today. Order online at PartsAvatar and receive your order within days.
Symptoms Of The OBD Error Code P203C
After knowing all the cause behind the issues, let’s have a look at few common symptoms of this problem. Read through this section to learn more about this error code.
Common Symptoms
- The level reading of the DEF is not right
- Exhaust emissions recorded are not within the manufacturer's specified range
- CEL (Check engine light) is visible
- Increased smoke noticed
- Visible DEF warning on instrument cluster
How To Correct P203C Reductant Level Sensor Circuit Low
Fixing problems with your car is not as easy as it might seem. You need to be extremely careful and follow certain steps.
- Repair or replace the faulty Exhaust gasket
- Repair or replace the Exhaust system components
- Repair or replace catalytic converter
- Repair or replace the temperature sensor
- Repair or replace ECM module
- Repair or replace the damaged engine wiring and connectors
If you need parts to correct this problem, you can easily find them all with us at PartsAvatar. We have in stock high end auto parts from Connectors, Temperature sensor, Catalytic converter, PCM, Exhaust gas, Exhaust system, EGT sensors. So what are you waiting for? Grab best deals today with us.
Easy Diagnosis Of Engine Error OBD Code P203C
If you want to easily diagnose this P203C fault code, then follow the steps:
Collect all the necessary information for diagnosis because it will make the process faster and more accurate. 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. 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.
Use the technical service bulletins and a reliable information source for your vehicle to 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, If you find that the level is still showing low, then there’s an issue with the reductant level sensor. You will need to replace it and this may help get rid of the P203C 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. If you feel you need help then contact a trained diagnostician.
All the electrical connections and components of the reductant level sensor connector have to be checked now. 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.
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 any of the parts that move, so that it’s out of harm.
Common Mistakes When Diagnosing the P203C Code
- Not following the diagnostic steps accurately
- Ruined DEF tank