Code result
P2252
O2 Sensor Negative Current Control Circuit Low
High severity
What it means
The negative-current (Vs negative) line on the bank 1, sensor 1 wide-band oxygen sensor is below the lower threshold. This line is the return path for the Nernst cell; loss of the signal blocks 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
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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