P2210 Fault Code

NOx Sensor Heater Sense Circuit Low Bank 1

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

The P2210 fault code indicates a problem with the NOx sensor heater sense circuit on Bank 1. This code typically triggers when the engine control module (ECM) detects that the voltage from the NOx sensor heater circuit is lower than expected. A malfunction in this circuit can impact the vehicle's emissions control system, leading to increased emissions and potentially reduced fuel efficiency.

What are the symptoms of the P2210 code?

Common symptoms associated with the P2210 code may include:

• Check Engine Light (CEL) illuminated on the dashboard
• Increased exhaust emissions
• Poor fuel efficiency
• Rough engine idle or performance issues
• Potential failure during emissions testing.

What causes the P2210 code?

There are several potential causes for a P2210 code, including:

• A defective NOx sensor or its heater
• Faulty wiring or connectors in the heater circuit
• Short circuit or open circuit in the NOx sensor heater
• Problems with the engine control module (ECM) or its programming
• Corrosion or damage in the electrical connectors.

How to fix P2210?

To resolve a P2210 code, you should:

1. Use an OBD-II scanner to confirm the fault code and check for related codes.
2. Inspect the wiring and connectors of the NOx sensor heater circuit for damage, corrosion, or loose connections.
3. Test the NOx sensor and its heater to ensure they are functioning correctly.
4. Replace the NOx sensor or repair the wiring if necessary.
5. Clear the fault codes and take the vehicle for a test drive to see if the code returns.