Powertrain, generic (extended)

P2210 NOx Sensor Heater Sense Circuit Low (Bank 1 Sensor 1)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2210 means the heater feedback signal of the upstream NOx sensor on bank 1 sits below its permitted range. Typical electrical causes are a short to ground in the sense line or a failed measuring stage in the sensor electronics. GM lists the code as NOx Sensor Heater Feedback Circuit Low for the 2024 Silverado/Sierra 3.0L diesel (LZ0). CARB requires the OBD system to detect heater circuit faults that conflict with the commanded state. P2211 is the opposite direction, P2208 the general sense-circuit fault, P2209 a plausible but poor heating result, and P2206 a low reading on the control side. The sensor then delivers no usable NOx value; the MIL comes on.

Likely causes

Fault in the sensor element or its control unit
Sense line shorted to ground
Corrosion in the connector

Symptoms

  • Malfunction indicator lamp on
  • No NOx reading in live data

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€250–900
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

nox sensornox sensor heaternox sensor wiring

Related codes

P2208P2209P2211P2212P2206P2223

References: law.cornell.edu, static.nhtsa.gov.