P2205 is an OBD-II diagnostic trouble code (DTC) that stands for “NOx Sensor Heater Control Circuit/Open (Bank 1 Sensor 1)”. This code indicates that the powertrain control module (PCM) has detected a problem with the NOx sensor heater control circuit for the first NOx sensor on bank 1.
The NOx sensor is a type of emissions sensor that measures the amount of nitrogen oxides (NOx) in the exhaust gas. NOx is a harmful pollutant that can contribute to smog and acid rain. The NOx sensor heater is used to warm up the NOx sensor so that it can operate more accurately.
If the PCM detects a problem with the NOx sensor heater control circuit, it will set P2205 and may illuminate the check engine light. This code can be caused by a number of things, including:
- A faulty NOx sensor
- A faulty NOx sensor heater
- A loose or damaged wiring harness
- A short circuit in the wiring harness
If P2205 is set, it is important to have the vehicle diagnosed by a qualified technician as soon as possible. Driving with a P2205 code can damage the NOx sensor and other emissions control components.
Here are some of the symptoms of P2205:
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