P0160 Code - O2 Sensor Circuit No Activity Detected Bank 2 Sensor 2

What Does P0160 Mean?

This code means that the powertrain control module has detected a fault in the circuit for the oxygen sensor for bank 2 sensor 2. The Check Engine Light will illuminate to let the owner know that there is a problem with the emissions system.

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What are the common causes of P0160 ?

As said earlier, this code is set when there is no activity on the O2 sensor circuit, Bank 2 Sensor 2. This thing usually happens when:

• There are holes in the exhaust, especially near the post cat O2 sensor
• Wiring problem, broken connectors, chaffed wires, melted harness, etc.
• Bad Bank 2, Position 2, Oxygen Sensor
• Bad PCM (rare)

What are the symptoms of P0160 ?

On some applications, there may be no symptoms present other than a stored trouble code and an illuminated CHECK ENGINE light. On the other hand, some symptoms may be so severe on other applications that the vehicle becomes undriveable; also be aware that the severity of one or more symptoms may vary between vehicles. Possible symptoms include the following-

• Severe driveability issues, such as severe loss of power, hesitation upon acceleration, and unexpected/unpredictable stalling.
• Increased fuel consumption that can vary from slight and barely detectable, to dramatic.
• Visible black smoke from the tail pipe.
• Hard starting.
• Oil dilution caused by over fuelling over extended periods.
• Reduced spark plug life.
• In extreme cases, engine longevity may suffer due to an overly-rich fuel mixture that washes the protective lubricating film off cylinder walls.

How do you troubleshoot P0160 ?

Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

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