Code result
P2239
O2 Sensor Pumping Current Circuit High
High severity
What it means
Pumping current at the bank 1 sensor 1 wide-band lambda probe is above the upper limit — short to supply or open return path.
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
Pump line shorted to supply
highOne of the most commonly reported causes for this code — check this first.
Return path to ECU open
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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