P209F - OBD II Trouble Code

Our automotive experts have put together the following information about the P209F diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P209F code.

OBD II Fault Code

• OBD II P209F

OBD-II Code Powertrain Control Module (PCM) failure is defined as a Reductant Tank Heater Control Circuit Performance

Diesel Exhaust Fluid (DEF) is used to assist in converting leftover exhaust particles to harmless gases. In order to burn off those particles, the temperature of the exhaust system needs to increase. the injection of DEF Fluid into the exhaust stream brings Diesel Particulate Filter (DPF) up to temperature. The system is then able to convert harmful NOx to Nitrogen, Carbon Dioxide, and water. The Reductant Catalyst (SRC) was added to further reduce any NOx was still in the exhaust stream. The Reductant Tank Heater heats the DEF Fluid to the temperature is more efficient. If the engine control module (PCM) detects the Reductant Tank Heater is not operating properly, it will set code P209F.

Powertrain Control Module (PCM) failure Symptoms

• DPF regeneration may not occur

Common Problems That Trigger the P209F Code

• Powertrain Control Module (PCM) failure
• Reductant tank heater control module failure
• Reductant tank heater failure
• Wiring issue