Code result
P2250
O2 Sensor Reference Voltage Circuit High
High severity
What it means
Bank 2 counterpart to P2246. The reference voltage at bank 2, sensor 1 is above the upper threshold, usually due to a short to positive or connector leakage.
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 line shorted to positive
highOne of the most commonly reported causes for this code — check this first.
Connector corroded with leakage
mediumA plausible cause — test and verify before replacing parts.
Supply wire pinched against B+ source
lowLess common, but worth ruling out after the more likely causes.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P2250 freeNo credit card required