Camshaft position sensor 'B' internally shorted to its power supply; Signal wire between the sensor and the computer shorted to a power wire in the harness; Corroded, pushed-back, or loose terminal at the sensor connector or computer connector; Failed or damaged reluctor wheel or tone ring on the camshaft causing an erratic signal; Moisture or oil intrusion into the sensor connector creating a conductive path to voltage; Faulty powertrain control module internal pull-up circuit (rare but possible)

DTC codes / P03xx · Ignition system and misfire / P0368

P0368Camshaft Position Sensor 'B' Circuit High (Bank 1)

Q: What does code P0368 mean?

Camshaft Position Sensor 'B' Circuit High (Bank 1). P0368 means the engine computer has detected an abnormally high voltage on the signal circuit for camshaft position sensor 'B' on bank 1, which is the side of the engine containing cylinder number one. The sensor's output is expected to switch between a low and a high voltage as the camshaft rotates, and a continuous high reading tells the computer the circuit is shorted to power or the sensor has failed.

P0368 means the engine computer has detected an abnormally high voltage on the signal circuit for camshaft position sensor 'B' on bank 1, which is the side of the engine containing cylinder number one. The sensor's output is expected to switch between a low and a high voltage as the camshaft rotates, and a continuous high reading tells the computer the circuit is shorted to power or the sensor has failed.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaIgnition system and misfire

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
Rough idle or misfiring because the computer loses precise camshaft timing information
Difficulty starting or a crank but no-start condition in severe cases
Reduced engine power or a limp-home mode triggered by the powertrain control module
Poor fuel economy or increased emissions due to inaccurate variable valve timing operation

Common causes, most likely first

Camshaft position sensor 'B' internally shorted to its power supply
Signal wire between the sensor and the computer shorted to a power wire in the harness
Corroded, pushed-back, or loose terminal at the sensor connector or computer connector
Failed or damaged reluctor wheel or tone ring on the camshaft causing an erratic signal
Moisture or oil intrusion into the sensor connector creating a conductive path to voltage
Faulty powertrain control module internal pull-up circuit (rare but possible)

How to diagnose and fix it

Scan all modules and record freeze-frame data to confirm P0368 is the only camshaft-related code
Inspect the sensor connector and harness for corrosion, chafing, or contact with a power wire
Back-probe the sensor signal wire with a multimeter and compare voltage to the manufacturer's specification
Disconnect the sensor and check for battery voltage on the signal circuit with the key on, which indicates a short to power
Perform a wiggle test on the harness while watching live sensor data to expose an intermittent short
Replace the camshaft position sensor if the circuit tests good but the signal remains stuck high
Clear codes and verify the repair with a road test and a full drive cycle

What a high cam signal really means

A high signal voltage does not automatically condemn the sensor, because a shorted signal wire or a faulty computer pull-up resistor can produce the same reading.
Many technicians replace the sensor only to find the connector pins are pushed back or green with corrosion, so inspect the terminals before buying parts.
Camshaft sensor 'B' on bank 1 is not always the primary timing sensor, and on some engines it monitors a separate camshaft used only for variable valve timing.
An engine with a failed cam sensor may still start and run because the crankshaft sensor provides default timing, which is why this code often appears with no drivability complaint.
Oil sludge or a loose reluctor wheel can create an intermittent high signal that only appears when the engine is hot, so test the circuit cold and hot.

Can I keep driving with P0368?

You can usually drive the vehicle to a repair shop if the engine starts and runs normally, but avoid heavy acceleration and long trips because a sudden loss of camshaft signal can cause a stall or a no-start. If the engine is misfiring, idling roughly, or entering limp mode, stop driving and have it diagnosed promptly.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.