Code or symptom/

P2200

  • Powertrain
  • Manufacturer-specific
  • Emissions
SeveritySeverity level 3 of 5: Diagnose soon.

Diagnose soon

Usually safe to drive short distances, but the fault will not clear itself and can worsen or fail an emissions test.

Standard definition

NOx Sensor Circuit (Bank 1)

This code is in our catalogue but has not yet been through editorial review, so the guidance below is limited to what our structured data supports. We publish deeper diagnostic content only after a code has been reviewed — here is why.

In plain English

The NOx sensor on bank 1 — typically upstream of the SCR catalyst — does not communicate or sends an invalid signal. NOx sensors are smart sensors with their own controller on the CAN bus; faults often involve heater failure or bus dropout.

A trouble code records what a control module measured. It does not identify which part failed. Test before replacing anything.

Can I keep driving?
Safe to drive
Usually safe to drive short distances, but the fault will not clear itself and can worsen or fail an emissions test.
Urgency
Diagnose soon
Will it pass emissions
No
Check engine light
Solid
Clearing the light
A completed drive cycle is normally required before the monitor re-runs and the light can clear.
Symptoms you may notice
  • Check engine light or NOx warning on
  • AdBlue/DEF level or quality warning
  • Possible no-start countdown after ignore period
  • Failed emissions inspection (NOx)

Many vehicles show no symptom at all beyond the warning light. The absence of a symptom does not mean the fault is not real.

Likely causes
#CauseHow oftenComponent
1NOx sensor failedVery common—
2Sensor wiring or CAN harness openCommon—

Ordering reflects how often each cause is responsible in general, not a probability for your vehicle. Confirm by testing.

Components involved
  • NOX Sensor
  • NOX Sensor Wiring
Sources
Definition
Generic code set (SAE J2012 / ISO 15031-6) via the OBDexopen database, dedicated to the public domain under CC0-1.0.
Diagnostic guidance
Written and reviewed in-house. See our editorial policy.
Review status
Awaiting review

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