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P2200 — NOx Sensor Circuit Bank 1
SeriousAftertreatmentPower derate likely — plan to stop soon
Seen on: Heavy Truck/Diesel
NOx Sensor Circuit Bank 1. Common causes: Failed upstream NOx sensor.
Don't risk it — get a diesel tech on the truck.
Your code rides along, so nearby mechanics see the fault before they quote you.
How serious is it?
Serious. Power derate likely — plan to stop soon.
Most likely causes
- Failed upstream NOx sensor
- Connector corrosion
- sensor poisoning
First moves (roadside)
- Inspect NOx sensor connector
- replace sensor if failed self-test
FAQ
What does P2200 mean?
NOx Sensor Circuit Bank 1. Common causes: Failed upstream NOx sensor.
How serious is P2200?
Serious — Power derate likely — plan to stop soon.
What's the most likely cause of P2200?
The most common cause is: Failed upstream NOx sensor. Other possibilities include Connector corrosion; sensor poisoning.
Can I keep driving with P2200?
Power derate likely — plan to stop soon. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Throwing this code right now?
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General diagnostic guidance for diesel engines (Cummins, Detroit, PACCAR, Volvo, Mack and more). Not a substitute for a scan-tool diagnosis on your specific truck.