The P2210: NOx Sensor Heater Sense Circuit Low Bank 1 refers to a condition where the voltage in the NOx sensor heater sense circuit of bank 1 is lower than expected. This can be caused by a faulty NOx sensor heater, wiring problems, or connector issues that prevent the heater from operating correctly.
P2210 – Quick Overview
Code | Information |
---|---|
Meaning | P2210: NOx Sensor Heater Sense Circuit Low Bank 1 |
Is it serious? | Yes, this can lead to improper heating of the NOx sensor, affecting emissions control and potentially causing poor engine performance. |
Possible causes | – Low voltage in NOx sensor heater sense circuit in bank 1 – Faulty NOx sensor heater or wiring issues – Connector problems |
How to diagnose? | – Measure voltage in the NOx sensor heater sense circuit in bank 1 – Test the NOx sensor heater sense for proper operation – Inspect wiring and connectors for faults |
P2210 Meaning
The P2210: NOx Sensor Heater Sense Circuit Low Bank 1 code indicates that the engine control module (ECM) has detected a lower-than-expected voltage in the NOx sensor heater sense circuit for bank 1 (the side of the engine containing cylinder 1). The NOx sensor relies on its heater to reach optimal operating temperature quickly, and a low voltage condition can prevent the heater from functioning properly, leading to inaccurate emissions readings and poor engine performance.
Step-by-step diagnostic guide
Action | Description | Tools Needed |
---|---|---|
Check for Other Codes | Use an OBD-II scanner to check for any additional related codes that could provide more information about the NOx sensor heater circuit. | OBD-II Scanner |
Measure Voltage in NOx Sensor Heater Sense Circuit | Use a multimeter to measure the voltage in the NOx sensor heater sense circuit in bank 1. Verify that the voltage is within the manufacturer’s specifications. | Multimeter, Vehicle Manual |
Test the NOx Sensor Heater Sense | Use a diagnostic tool or multimeter to test the NOx sensor heater sense circuit for proper operation. Compare sensor readings to the manufacturer’s specifications. | Multimeter, Diagnostic Tool |
Inspect Wiring and Connectors | Visually inspect the wiring and connectors related to the NOx sensor heater sense circuit for damage, corrosion, or loose connections that could result in low voltage. | Flashlight, Safety Gloves |
Check Circuit Continuity | Test for continuity in the NOx sensor heater sense circuit to ensure proper current flow. A low voltage issue could be caused by high resistance or an open circuit. | Multimeter, Wiring Diagram |
Repair or Replace Faulty Components | If any faulty wiring, connectors, or components are identified, repair or replace them as needed to restore the proper voltage to the circuit. | Replacement Parts, Tools |
Clear the Code and Test Drive | After repairs, clear the P2210 code using an OBD-II scanner and take the vehicle for a test drive to ensure the issue is resolved. | OBD-II Scanner |
Recheck for Codes | After the test drive, re-scan the vehicle to confirm that the P2210 code does not return. | OBD-II Scanner |

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