Code result
P2244
O2 Sensor Reference Voltage Circuit Range/Performance
High severity
What it means
The reference voltage that the ECU supplies to the wide-band oxygen sensor on bank 1, sensor 1 drifts outside the expected range. The reference is the baseline against which the cell voltages are measured; a drift falsifies every 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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