Code result
P2248
O2 Sensor Reference Voltage Circuit Range/Performance
High severity
What it means
Bank 2 counterpart to P2244. The reference voltage at the wide-band oxygen sensor on bank 2, sensor 1 is outside its expected range and falsifies the lambda calculation.
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
Reference circuit drift in ECU
highOne of the most commonly reported causes for this code — check this first.
High resistance in reference wiring
mediumA plausible cause — test and verify before replacing parts.
Sensor element aged beyond calibration window
lowLess common, but worth ruling out after the more likely causes.
Related help
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