Quick answer: The P0368 code indicates that the engine control module detected an abnormally high voltage signal from the Bank 1 exhaust camshaft position sensor (“Sensor B”). This directly affects engine timing and ignition performance. Prompt attention is needed to prevent engine stalling, hard starting, or poor acceleration.
Seeing a check engine light trigger the P0368 code can be frustrating, especially if your car takes longer than usual to start. This diagnostic trouble code points to a specific electrical issue within your engine’s timing system. In this article, you will learn what causes the P0368 code, symptoms to watch out for, and how to fix it efficiently.
What Does P0368 Mean?
The Engine Control Module (ECM) constantly monitors the speed and rotational position of the camshafts using dedicated position sensors. This information allows the computer to precisely time fuel injection and spark plug ignition. “Bank 1” identifies the side of the engine that contains cylinder number one, while “Sensor B” designates the exhaust camshaft position sensor. A P0368 code triggers when the ECM receives a continuous voltage signal from this sensor circuit that is above the maximum normal limit, typically caused by a short to power or an open ground connection.
Symptoms
- Illuminated check engine light on the dashboard
- Extended engine cranking before the vehicle starts
- Engine stalling or erratic idling at stops
- Lack of engine power during acceleration
- Noticeable drop in fuel economy
Possible Causes
Replacing the sensor immediately is a common mistake; electrical wiring issues are often the actual culprit behind high-voltage circuit codes.
- Corroded, melted, or damaged wiring along the sensor circuit
- Loose or broken electrical connector at the exhaust camshaft sensor
- Faulty exhaust camshaft position sensor (Bank 1)
- Engine oil contamination or extremely low oil levels affecting variable valve timing
- Weak or improperly grounding vehicle battery
- Faulty Engine Control Module (rare)
Check These Yourself Before Visiting a Mechanic
- Visual Harness Inspection: Locate the exhaust camshaft sensor on Bank 1 and inspect the wiring for frayed insulation, burn marks, or loose connector tabs.
- Check Oil Level: Pull the dipstick to ensure the engine oil level is correct and the oil is clean, as hydraulic timing actuators rely on clean oil pressure.
- Battery Connection Check: Verify that your battery terminals are clean and tight, as unstable system voltage can trigger artificial circuit-high fault codes.
How to Fix It
- Connect an OBD-II scanner to clear the code and check for secondary codes related to system voltage or timing.
- Inspect the Bank 1 exhaust camshaft sensor harness and plug for broken pins, moisture, or severe corrosion.
- Use a digital multimeter to test for reference voltage (typically 5V or 12V) and ground continuity at the sensor harness plug.
- Test the signal wire for a short to battery voltage if the circuit reading remains consistently high.
- Replace the Bank 1 exhaust camshaft position sensor if the wiring tests within normal operational specifications.
Estimated Repair Costs (2026)
| Job | Parts ($) | Labor ($) |
|---|---|---|
| Camshaft Position Sensor Replacement | $40 – $110 | $80 – $160 |
| Wiring Harness Repair | $15 – $40 | $100 – $220 |
| Diagnostic Fee | $0 | $90 – $150 |
Note: These are estimated 2026 repair costs in US dollars. Total prices vary depending on your vehicle’s make, model, and local shop labor rates.
Frequently Asked Questions
Can I drive with the P0368 code?
You can usually drive a short distance to a safe location, but it is not recommended for daily travel. The engine may stall unpredictably, fail to restart, or enter a limp-mode state to protect internal components.
How do I clear the P0368 code?
You can clear the code using an OBD-II scanner after diagnosing and repairing the underlying electrical issue or replacing the sensor. If the problem is not fixed, the light will turn back on shortly after starting the engine.
What is the difference between Sensor A and Sensor B?
Sensor A refers to the intake camshaft position sensor, while Sensor B refers to the exhaust camshaft position sensor. Bank 1 specifies the engine bank containing cylinder number one.