P2205 Fault Code

NOx Sensor Heater Control Circuit/Open Bank 1

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2205 fault code indicates an issue with the NOx (Nitrogen Oxide) sensor heater control circuit for Bank 1. This sensor is essential for measuring the levels of nitrogen oxides in the exhaust gases, which helps manage emission levels and optimize engine performance. If the heater control circuit is open or malfunctioning, it can cause inaccurate readings and lead to increased emissions.

What are the symptoms of the P2205 code?

• Engine warning light (check engine) illuminated.
• Increased emissions during vehicle inspections.
• Potential decrease in engine performance or efficiency.
• Rough idling or difficulty starting the engine.

What causes the P2205 code?

• Broken or damaged wiring in the NOx sensor heater circuit.
• Poor electrical connections or corrosion at the connector.
• A faulty NOx sensor that is unable to operate correctly.
• Problems within the engine control module (ECM) affecting sensor readings.

How to fix P2205?

• Inspect the wiring and connectors related to the NOx sensor for damage or corrosion.
• Repair or replace any broken wires and ensure solid connections.
• Test the NOx sensor with a multimeter to check for proper operation and replace if faulty.
• Clear the fault code and perform a road test to ensure the issue is resolved.