P2255

O2 Sensor Negative Current Control Circuit Low Bank 2 Sensor 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Increased fuel consumption
Unstable engine operation at idle
Check Engine Light Illuminates
Reduced engine power
Increased level of harmful emissions

Causes

Oxygen sensor malfunction (bank 2, sensor 1)
Open or short circuit in control circuit
Poor contact in the sensor connector
Corroded or damaged wiring
Engine control unit malfunction

How to Fix

Check the condition of the oxygen sensor and its connector
Check the continuity and resistance of the control circuit
Check for short circuit to ground or power
If necessary, replace the oxygen sensor
Check and, if necessary, reflash the ECU

Related codes

P2256 P2254 P0135