Code result
P2254
O2 Sensor Negative Current Control Circuit Low
High severity
What it means
Bank 2 counterpart to P2252. The Vs negative line on the wide-band oxygen sensor at bank 2, sensor 1 is below the lower threshold.
Is it safe to drive?
No — stop driving
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.
Most likely causes
Vs negative line shorted to ground
highOne of the most commonly reported causes for this code — check this first.
Nernst cell return open inside sensor
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
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