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

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.

Bank 1 is the side of the engine with cylinder 1. Inline engines only have this bank.

Symptoms

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

Most likely causes

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

What to check, in order

Start with the simplest. You can tick off each step.

1. Read the codes and the NOx data before and after the SCR catalyst
2. With the connector unplugged, check whether the signal wire is making contact with ground.
3. Check the sensor's connector and wiring
4. Look for exhaust leaks ahead of the sensor
5. Confirm that the AdBlue/DEF is of good quality
6. Replace the sensor only after ruling out power, ground, and leaks

Good to know

• Repair difficulty: medium
• It affects emissions.

What each character of P2210 means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• 2: Fuel injection
• 10: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2210?

You can usually keep driving in the short term, but get it repaired soon: on many diesels, the warning eventually limits starting or engine power.

What causes code P2210?

The most common causes are: fault in the sensor element or its control unit; sense line shorted to ground; corrosion in the connector.

Related codes

• P2208NOx Sensor Heater Sense Circuit (Bank 1 Sensor 1)
• P2209NOx Sensor Heater Sense Circuit Range/Performance (Bank 1 Sensor 1)
• P2211NOx Sensor Heater Sense Circuit High (Bank 1 Sensor 1)
• P2212NOx Sensor Heater Sense Circuit Intermittent (Bank 1 Sensor 1)
• P2206NOx Sensor Heater Control Circuit Low (Bank 1 Sensor 1)
• P2223NOx Sensor Heater Sense Circuit Low (Bank 2)

Sources

• law.cornell.edu: 13 CCR 1968.2
• static.nhtsa.gov: MC 11018070 0001

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.