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P206B - OBD Trouble Code

OBD Code P206B - Reductant Quality Sensor Circuit Range/Performance

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Wondering on how to comprehend and diagnose the error code P206B? Don’t worry, Parts Avatar has got you covered! All you need is this little guide by Parts Avatar to solve the error code P206B. This OBD-II code wiring issue is also known as the reductant quality sensor circuit range/performance. The reductant catalyst system’ usage of DEF and its capacity to convert NOx to nitrogen, carbon dioxide and water is monitored by the engine computer (PCM). The reductant quality sensor regulates the execution and performance of the reductant system through the powertrain control module. When the sensor transfers an improbable signal, the error code P206B is stored.

Learn More About OBD Error Code P206B

The oxygen sensors installed in a car perform the function of measuring the oxygen in the exhaust to determine how rich or lean the ratio of the fuel and air is in the cylinders. The mixture should be optimized to attain a better fuel economy and lesser exhaust emissions. If you find the error code P206B stored, the operations of the VCT solenoid should be verified.  It can be due to a clinging or binding VCT solenoid (caused by the contamination).


What causes this problem with the Obd Code P206B - Reductant Quality Sensor Circuit Range/Performance?


  • A possible damage in the reductant quality sensor
  • A disconnected or shorted reductant quality sensor harness
  • A poor electrical connection running in the reductant quality sensor circuit

Replace/Repair These Parts To Fix OBD Code P206B

  1. Reductant Sensor - The reductant sensors installed in the system works to reduce gases or emissions that come from the exhaust. So, in order to avoid any problems caused by a malfunctioning reductant sensor, we advise you to get it changed or repaired as soon as possible. Don’t know where to shop from? Log into your favourite website Parts Avatar for your new reductant sensor available at just the right price.
  2. Powertrain Control Module - A powertrain control module is often regarded as the brain of the system. A fault in the powertrain control module is likely to trigger problems with the engine such as a sluggish engine crank, rough idle and illuminated malfunction indicator light. Now you can simply overcome the problems caused by the error code by logging into Parts Avatar for your new PCM.
  3. Diesel Exhaust Fluid Pump - Suddenly observing an increased consumption by the equipments? Noticing a loss of efficiency of the diesel exhaust fluid? Well, we just know the reason behind it. All of this is likely to be caused due to a bad diesel exhaust fluid pump. Visit our site today to grab amazing deals on premium quality products.
  4. Reductant System - Facing the error code P206B? Reductant pressure sensor not functioning? Well, get that fixed with a new reductant system parts available at Parts Avatar online at the best prices.

Symptoms Of OBD Error Code P206B

It is vital to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD code P206B here:


Common Symptoms


  • The DPF regeneration failing to occur
  • An illuminated check engine light

How To Correct P206B Reductant Quality Sensor Circuit Range/Performance

Want to correct the trouble code P206B? Read these points mentioned below:


  • Firstly, repair or replace a faulty reductant quality sensor
  • Measures should be taken to mend or restore a shorted or loose harness in the reductant quality sensor
  • A poor electrical connection running in the reductant quality sensor circuit should be fixed as soon as possible


Parts Avatar Canada is here to solve all your issues related to car parts. We have stocked a wide range of best priced quality sensor, PCM, DEF, implausible signal, reductant system, fuel injectors, fuel injector harness, injection pump, body control module  and a lot more to help you out in fixing your car.

Easy Diagnosis Of Engine Error OBD Code P206B

Here we have listed how you can simply diagnose the error code P206B:


A scanner (or code reader) and a digital volt/ohmmeter will be helpful in precisely diagnosing this code-storing condition. Begin your diagnosis with a visual inspection of system wiring, connectors, and components. Repair or replace any open, shorted, damaged, or corroded items as required and retest the system to make sure that repairs were successful. If the system wiring, connectors, and components appear to be in conventional working order, connect the scanner to the diagnostic connector and record all stored trouble codes and freeze frame data. This information can be highly important in diagnosing intermittent conditions that may have stimulated the code being stored. After the codes are retested, operate the vehicle to see if the code returns. If the code fails to immediately return, you may have an intermittent condition.


Common Mistakes When Diagnosing the P206B Code


Only for our customers information, we have listed here a few general mistakes that should be completely avoided in order to prevent a misdiagnosis:


  • A possible fault in the reductant quality sensor
  • A malfunctioning selective catalytic reduction (SCR)
  • Wiring problems in the system
  • A polluted diesel exhaust fluid (DEF)

Other Diagnostic Codes Related To OBD Code P206B

P206A - Reductant Quality Sensor Circuit

P206C - Reductant Quality Sensor Circuit Low

P206D - Reductant Quality Sensor Circuit High