Code result
P2198
O2 Sensor Signal Stuck Rich
Moderate severity
What it means
The upstream oxygen sensor on bank 2 returns a constant rich signal under deceleration fuel cut-off where lean is expected. Often a contaminated sensor (silicone, oil, coolant) or short to ground that pulls the signal high in some sensor types.
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
Upstream sensor contaminated
highOne of the most commonly reported causes for this code — check this first.
Related help
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