P2255: O2 Sensor Negative Current Control Circuit Low Bank 2 Sensor 1
What to do
Expect worse economy and reduced power. Ask for the harness route on that side to be inspected rather than only the sensor end.
What this code means
The bank 2 negative current control circuit reads below its valid range, normally a short to ground. A chafe against the exhaust or a bracket on that side of the engine is the usual finding, as at P2252.
Likely causes
Start here
- Wiring shorted to ground · moderate
- Melted wiring against the exhaust · moderate
- Faulty oxygen sensor · moderate
Less common
- Damaged wiring harness · moderate
Symptoms
Components involved
Information, not instruction
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Community experience
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