P206B OBD-II: Reductant Quality Sensor Circuit Range/Performance
P206B Severity
Should you fix P206B yourself?
Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.
Proper diagnosis will save you time and money on unnecessary repairs.
Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.
What causes OBD-II fault code P206B?
The engine computer (PCM) monitors the Reductant Catalyst System's use of DEF and its ability to convert NOx to Nitrogen, Carbon Dioxide, and Water. The PCM uses a Reductant Quality Sensor to monitor the performance of the Reductant system. If the sensor sends back an implausible signal, code P206B is set.
OBD II Fault Code
- OBD II P206B
OBD-II Code Wiring issue is defined as a Reductant Quality Sensor Circuit Range/Performance
The engine computer (PCM) monitors the Reductant Catalyst System's use of DEF and its ability to convert NOx to Nitrogen, Carbon Dioxide, and Water. The PCM uses a Reductant Quality Sensor to monitor the performance of the Reductant system. If the sensor sends back an implausible signal, code P206B is set.
Wiring issue Symptoms
- DPF regeneration may not occur
Common Problems That Trigger the P206B Code
- DEF contamination
- Reductant quality sensor failure
- Selective Catalytic Reduction (SCR) failure
- Wiring issue
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