Code result
P2B88
Intake Air O2 Sensor Circuit Bank 1
Moderate severity
What it means
The ECM detects a generic fault on the intake air oxygen sensor signal circuit on bank 1. A drifted or sluggish lambda sensor lets the mixture run lean or rich without correction — fuel economy and emissions suffer immediately.
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
Intake air O2 sensor failed
highOne of the most commonly reported causes for this code — check this first.
Wiring or connector fault
mediumA plausible cause — test and verify before replacing parts.
Related help
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