P0368

P0368 is camshaft position sensor B circuit low on bank 1 — the exhaust cam sensor signal voltage is below the expected minimum, meaning either the sensor itself has failed shorted-low, the signal wire is shorted to ground, or the sensor is no longer getting its reference voltage. Diagnostic ladder: at the sensor connector with key on, verify 5V reference on the power pin and clean ground; if the 5V reference is absent, the wiring or the ECM 5V supply has failed. If the 5V reference is present but the signal pin reads 0V or near-0V with the engine running, the sensor is shorted internally and needs replacement. Inspect the connector for oil intrusion — leaking valve cover gaskets dump oil into cam sensor connectors and corrode the pins, which is the #1 cause on inline-6 BMWs and dual-VVT Toyotas. Caveat: P0368 paired with intermittent stalling and a check-engine light that comes and goes is often a wounded ECM 5V reference output, not the sensor itself — measure the 5V at multiple sensors and look for sag under load before authorizing parts.

Vehicle-specific patterns: Toyota 2GR-FE V6 dual VVT-i (Camry, Avalon, Highlander, RAV4, 2007-2017) — bank-1 exhaust cam sensor failure or oil-fouled connector from leaking valve cover gasket. BMW N52/N53 inline-6 (E90 328i, E60 530i, 2006-2011) — bank-1 exhaust cam sensor failure from valve cover gasket oil leak saturating the sensor. Mazda Skyactiv-G 2.0L/2.5L (Mazda3, CX-5, 2014+) — exhaust cam sensor failure from heat soak; sensor lives on the back of the head and cooks. Hyundai Theta II 2.4L (Sonata, Santa Fe, 2011-2018) — exhaust cam sensor short-to-ground from harness chafe at the cam cover edge. Estimated repair: $120 to $600.