S2025000006

STAR ONLINE PUBLICATION
Case Number: S2025000006
Release Date: 7/02/2020
Symptom/Vehicle Issue: Malfunction Indicator Lamp (MIL) Illumination. Diagnostic
Trouble Code (DTC) P206D – Reductant Quality Sensor Circuit High Set.
Discussion: A small number of customers may experience a MIL illumination. Upon
further investigation a technician may find DTC P206D set in the Powertrain Control
Module (PCM) memory.
Note: Current diagnostics indicate that this DTC is electrical based. However,
this DTC can also be caused by DEF quality issues as well. This SOL publication
addresses the DEF quality portion of the diagnostic
Prior to clearing the DTCs and proceeding with normal diagnostics, please be sure to
save the following information:




Vehicle Scan Report
“Urea (DEF) Concentration” In Wi-Tech PCM data
“Urea (DEF) Tank Temperature At Quality Sensor” In Wi-Tech PCM data
“Urea (DEF) Tank Temperature Sensor” In Wi-Tech data **this is a separate
reading from the in-tank temperature sensor**
 DEF Concentration when tested with the appropriate DEF Refractometer
 Hydrocarbon Test Strip results
 Customer driving cycle and approximate weather conditions at the time of the
failure.
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online does
not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear to be
similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the appropriate
course of action.
Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no
solution is found
FCA US LLC
Version 4.2 02/06/2017
STAR ONLINE PUBLICATION
Please document and/or attach all information gathered to the warranty claim when
filing.
Proceed with the normal published diagnostics for the DTC set to rule out any potential
electrical issue causing the DTC. If normal diagnostics lead to replacing the DEF tank
perform the following procedure to ensure the tank is the cause.
1. Remove the tank and drain all fluid. If frozen, be sure to thoroughly thaw the tank
before draining.
2. Add .5 to 1 gallon of fresh DEF fluid.
3. Gently slosh (shake) the DEF tank to break up, and reconstitute any crystalline
material built up on the bottom of the tank.
4. Completely drain the tank.
5. Reinstall the tank and add 3.5 to 5 gallons of fresh DEF
Note: Only use appropriate funnels or tools that have not been used to fill any
other type of fluid. Otherwise, contamination of the new DEF fluid may result.
6. Clear the DTCs and drive the vehicle for 10 minutes. If the DTC returns, or is still
active and will not clear, then replace the DEF tank.
This document does not authorize warranty repairs. This communication documents a record of past experiences. STAR Online does
not provide any conclusions about what is wrong with the vehicle. Rather, it captures all previous cases known that appear to be
similar or related to the vehicle symptom / condition. You are the expert, and you are responsible for deciding on the appropriate
course of action.
Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket if no
solution is found
FCA US LLC
Version 4.2 02/06/2017