Last updated on August 25th, 2026 at 03:52 pm
Drivers first notice the check‑engine light flashing or staying solid while the engine idles unevenly. A common early sign is a rough idle that smooths out after the engine warms. Acceleration may feel hesitant, and the vehicle can stall when the throttle is lifted or during a cold start. In some cases the engine will not crank at all, and the starter will turn the engine over without ignition. These behaviors all stem from the ECU detecting a low‑voltage condition on the Camshaft Position Sensor B circuit for Bank 1.
DTC P0367 · engine computer (ECM/PCM)
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Because the camshaft position sensor provides timing reference to the ECU, any loss of signal can interrupt fuel‑injection and ignition timing, producing the above drivability issues.
Corroded connectors, frayed harnesses, or broken pins create a voltage drop that the ECU reads as “low circuit.” Even a small increase in resistance can push the sensor voltage below the ECU’s threshold, triggering P0367.
The sensor itself contains a Hall‑effect or magnetic pickup element. Moisture intrusion, mechanical shock, or age‑related coil degradation can short the output, pulling the voltage toward ground.
The ECU processes the sensor’s pulse train. A failing ECU input driver, damaged PCB trace, or software glitch can misinterpret a normal sensor signal as low voltage, storing P0367 even when the sensor and wiring are sound.
A missing or corroded ground strap for the sensor circuit can cause the ECU to see a floating reference, again resulting in a low‑circuit condition.
Some newer platforms route camshaft data through a secondary control module (e.g., a powertrain control module). A malfunction in that module’s communication link to the main ECU can generate the same code.
– Wiring/connector repair – Replace corroded pins, repair harness sections, and reinstall the connector with dielectric grease.
– Sensor replacement – If the sensor fails the voltage or waveform test, replace it. While the sensor is a component, the root cause may still be a communication fault; proceed to module verification.
– ECU/PCM repair or replacement – When the ECU input test fails, consider ECU repair (board-level) or replacement. A re‑programmed, VIN‑matched ECU ensures proper sensor integration.
Cost expectations
If the ECU input driver test fails, or if repeated wiring repairs and sensor swaps do not clear P0367, the control module itself is likely compromised. ECU repairs that address a single failed input often provide only a temporary fix; internal moisture or board damage can quickly re‑trigger the fault. In such cases, a replacement ECU that is pre‑programmed to the vehicle’s VIN eliminates the guesswork and restores reliable camshaft timing data.
Flagship One specializes in VIN‑matched control modules, providing a plug‑and‑drive solution backed by a comprehensive warranty. Modern control modules are tightly integrated with security, immobilizer, and powertrain systems, making correct programming essential. Flagship One’s units arrive fully calibrated to your vehicle’s specifications, ensuring seamless communication with the Camshaft Position Sensor B circuit and eliminating recurring low‑circuit errors.
Service Recommendation: Most issues related to this fault are diagnosed and corrected through inspection, wiring repair, and calibration rather than module replacement. For modules not typically replaced through aftermarket suppliers, diagnosis and repair should be performed by a certified automotive technician with access to factory service information and tooling.