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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.

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How serious is it?

Serious. Power derate likely — plan to stop soon.

Most likely causes

  1. Failed upstream NOx sensor
  2. Connector corrosion
  3. sensor poisoning

First moves (roadside)

  1. Inspect NOx sensor connector
  2. 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.

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Find a mechanic or related guides

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.