NOx Sensor Circuit (Bank 1)
The DURAMAX-P2200 (Duramax) diesel fault code means: NOx Sensor Circuit (Bank 1). This is a serious severity code.
- Keep driving?
- Yes, with caution
- DIY difficulty
- advanced
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What Are the Symptoms of DURAMAX-P2200?
- Check Engine Light on
- Emissions or DEF system warning message
- Possible reduced power if the fault is not repaired
What Causes DURAMAX-P2200? (Most Likely First)
- Failed NOx sensor High
- Damaged wiring or a corroded connector near the exhaust High
- Sensor power or ground problem Moderate
- Sensor control module fault Low
Can I Still Drive with DURAMAX-P2200?
Yes, with caution. DURAMAX-P2200 is rated serious severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What does P2200 mean on a Duramax?
P2200 means NOx Sensor Circuit (Bank 1). The engine computer has detected a fault in the bank 1 NOx sensor circuit.
Is P2200 a Duramax-specific code?
No. P2200 is a generic OBD-II code defined by SAE J2012, so it means the same thing on any vehicle that sets it. The exact conditions GM uses to set it on its diesels are in GM service information.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose DURAMAX-P2200?
Find which NOx sensor is bank 1 on your truck in the service information.
Inspect the sensor connector and harness for heat damage.
Check the sensor power and ground before replacing it.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines P2200 as a generic OBD-II code)
P2200 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:
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