Code result
P2099
Post Catalyst Fuel Trim System Too Rich
Moderate severity
What it means
Bank 2 counterpart of P2097. Post-catalyst trim on bank 2 has reached the rich limit — usually a depleted catalyst or a downstream sensor biased rich on the bank 2 side.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Bank 2 catalyst oxygen storage exhausted
highOne of the most commonly reported causes for this code — check this first.
Bank 2 downstream sensor biased rich
mediumA plausible cause — test and verify before replacing parts.
Related help
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