Quick answer: The ECU sees little or no believable activity from the downstream oxygen sensor on Bank 2.
Drivers also search this fault as bank 2 sensor 2 no activity, rear O2 no activity bank 2, downstream oxygen sensor dead bank 2.
P0160 is the Bank 2 counterpart to P0140. It means the rear oxygen sensor signal on Bank 2 is essentially inactive, flatlined, or too dead for the ECU to use with confidence. The code usually points to a rear-sensor or wiring failure path, not directly to a converter verdict, even though catalyst monitoring on Bank 2 will become unreliable at the same time.
P0160 is commonly driveable short-term, but Bank 2 catalyst monitoring and emissions readiness remain unreliable until the rear-sensor activity is restored.
Cause phrases often tied to this code: rear O2 flatline bank 2, dead downstream sensor, open circuit, connector unplugged, Bank 2 exhaust wiring issue.
Brand hubs help broaden internal linking now and can evolve into make-specific diagnostic notes later.
Useful when the driver knows the wording but not the exact DTC yet.
Yes. Both point to no meaningful downstream O2 activity, but on different banks.
No. It means the Bank 2 rear-sensor signal is not active enough to trust, which is different from proving converter failure.
Absolutely. An open circuit, unplugged connector, or heat-damaged harness can all create a no-activity code.