P209F Possible Causes
- Faulty reductant tank heater control
- Reductant tank heater control harness is open or shorted
- Poor electrical connection in reductant tank heater control circuit
What Does It Mean?
How to Fix Code P209F
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P209F Possible Symptoms
Check Engine Light illuminated (or Service Engine Soon warning light)
P209F Meaning
The reductant tank heater is located in close proximity to the reductant tank temperature sensor. Therefore, the reductant tank temperature sensor can be used to monitor the reductant tank heater performance.
When the reductant tank heater is activated, the reductant tank temperature should increase. If it does not, a fault will be set. If the vehicle is used for several consecutive short drive cycles, the test may require more than one drive cycle.