O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2)
What does P0160 mean?
The P0160 code means the vehicle's onboard diagnostic system has detected: O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2). This is a low severity code.
Common Symptoms
- Check Engine Light on
- No significant drivability symptoms
- Catalyst monitor will not complete readiness
- Increased tailpipe emissions
- Emissions test failure
Probable Causes (Ranked by Likelihood)
- Failed O2 sensor producing no signal Very High
- Open circuit in the signal wiring High
- Disconnected or corroded sensor connector Moderate
- O2 sensor heater failure preventing warm-up Moderate
- PCM signal circuit fault Low
Step-by-Step Diagnostic Procedure
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Monitor bank 2 sensor 2 voltage on a scan tool. A reading stuck at approximately 0.45V that never fluctuates confirms no sensor activity.
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Check the sensor heater circuit. If the heater has failed, the sensor may never warm up enough to produce a valid signal.
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Disconnect the sensor and verify signal wire continuity from the connector to the PCM.
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Inspect the connector for corrosion, water damage, or pushed-out pins.
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If wiring is intact and the heater works, replace the O2 sensor.
Frequently Asked Questions
Can I drive with code P0160?
Yes, you can drive normally. The downstream sensor on bank 2 is used for catalyst monitoring only and does not affect fuel control or engine performance.
What does no activity detected mean?
The PCM expects the O2 sensor voltage to fluctuate as exhaust conditions change. When the voltage remains fixed and does not move, the PCM determines there is no sensor activity, meaning the sensor is dead or disconnected.
Is P0160 the bank 2 version of P0140?
Yes. P0140 indicates no activity on bank 1 sensor 2, and P0160 is the same fault on bank 2 sensor 2.