What Does P0368 Mean?
The camshaft position sensor B on bank 2 is reporting an abnormally high voltage to the ECM. The signal exceeds the maximum expected operating threshold, which may indicate a sensor internal fault, wiring short to voltage, or reference circuit issue. The ECM cannot accurately determine the exhaust camshaft position on bank 2, leading to degraded engine performance and potentially disabled VVT on that bank.
Common Causes
35%
Short to battery voltage in the CMP sensor B signal wire on bank 2 due to harness chafing or damage
30%
Failed CMP sensor B with internal short producing excessive output voltage
15%
Wiring harness short between the signal wire and 5V reference wire within the CMP sensor B circuit
10%
ECM pull-down circuit failure for the CMP sensor B input allowing the signal to float high
10%
Aftermarket sensor with incorrect output characteristics for the application
Diagnostic Steps
1
Monitor CMP sensor B (bank 2) voltage on live data — determine if the signal is constantly pegged high (wiring short) or intermittently spiking (sensor or interference issue).
2
Disconnect the CMP sensor B connector and check voltage on the signal wire at the ECM — if voltage remains high with the sensor unplugged, the short to voltage is in the harness, not the sensor.
3
Inspect the CMP sensor B harness routing on bank 2 for chafing against engine brackets, heat shields, or other wire bundles that could expose the signal wire to battery voltage.
4
With the sensor disconnected, check for short between the signal wire and adjacent wires in the harness connector — measure resistance between the signal pin and all other pins.
5
If wiring tests clean, install a new OEM-specification CMP sensor B and verify the signal output is within the expected range on live data.
Estimated Repair Cost
$100 - $500
Parts + labor, varies by vehicle and location
The camshaft position sensor B on bank 2 is reporting an abnormally high voltage to the ECM. The signal exceeds the maximum expected operating threshold, which may indicate a sensor internal fault, wiring short to voltage, or reference circuit issue. The ECM cannot accurately determine the exhaust c...
The most common cause of P0368 (Camshaft Position Sensor B Circuit High Input (Bank 2)) is: Short to battery voltage in the CMP sensor B signal wire on bank 2 due to harness chafing or damage
Typical repair costs for P0368 range from $100 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Drive cautiously. The ECM will use a fallback strategy for the affected bank, reducing performance. The VVT system on bank 2 will likely be disabled. If the engine misfires or runs very rough, limit driving. The condition itself is unlikely to cause sudden stalling but engine performance will be noticeably degraded.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0368 to identify the root cause.
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Quick Info
Category
Powertrain
System
Ignition System
Difficulty
Type
Generic (SAE)
Recommended Tools
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