P21B3 — CLOSED LOOP NOX ABSORBER CONTROL AT LIMIT – TOO HIGH
Severity: Warning
Can you drive? With caution: limp mode possible, have it checked soon
Make: All makes (OBD-II standard)
| Meaning | CLOSED LOOP NOX ABSORBER CONTROL AT LIMIT – TOO HIGH. |
| Family | Powertrain (P) |
Frequently asked questions
What does code P21B3 mean?
CLOSED LOOP NOX ABSORBER CONTROL AT LIMIT – TOO HIGH. CLOSED LOOP NOX ABSORBER CONTROL AT LIMIT – TOO HIGH.
Can I keep driving with code P21B3 active?
With caution: limp mode possible, have it checked soon
How do you fix code P21B3?
Diagnosis starts from reading the live ECU parameters: the code points to the fault area, not to the part to replace. A vehicle-electronics specialist can test the component and clear the code after the repair.
Need help with this fault?
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Where to get it fixed
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