Drivers first notice that the engine no longer runs smoothly. A flashing or steady check‑engine light appears, and the vehicle may stumble when the throttle is applied. Idle speed can become erratic, and the engine may miss or fire unevenly under load, resulting in a noticeable loss of power. In some cases, the PCM will set a “Reduced Engine Power” mode, limiting acceleration to protect the engine. These manifestations are directly linked to the loss of a reliable camshaft‑position signal, which the PCM uses to time fuel injection and ignition events.
The PCM sends a voltage‑level signal to the camshaft‑position sensor. Corroded connectors, broken wires, or damaged pins can create an open circuit, preventing the sensor from returning a valid signal. Conversely, a short to ground or power can overload the PCM’s output driver, forcing it to shut down the circuit and set P2614.
The CPS on Bank 1 provides the reference pulse that the PCM uses to determine camshaft rotation. Internal coil failure, cracked housing, or contamination from oil can stop the sensor from generating a pulse, resulting in an “open” condition from the PCM’s perspective.
Modern PCM designs incorporate a dedicated driver transistor that energizes the CPS. Heat‑related stress, moisture intrusion, or internal component fatigue can cause the driver to fail. When the driver cannot supply the required voltage, the PCM records an open‑circuit condition and logs P2614.
Use a scan tool to read the stored P2614 and any related codes (e.g., P0010, P0011). Freeze‑frame parameters—engine speed, load, and coolant temperature—help confirm that the fault appears under normal operating conditions.
– Visually examine the harness from the PCM to the Bank 1 camshaft sensor. Look for frayed wires, corrosion, or damaged clips.
– Perform a continuity test on the sensor’s power and ground wires with a multimeter; resistance should match the manufacturer’s specification (typically 0 Ω to a few hundred ohms).
– Check for short circuits by measuring resistance to ground and to battery voltage.
– Connect the scan tool’s live data stream to the Camshaft A Position sensor reading. A healthy sensor produces a regular square‑wave pulse that varies with engine RPM.
– If the waveform is absent or erratic, replace the sensor and retest. Most sensors cost $80‑$150; labor is about 0.5 hour.
– With the sensor disconnected, measure the voltage on the PCM’s sensor output pin while cranking the engine. The PCM should supply a reference voltage (often 5 V).
– No voltage indicates a driver failure; voltage present but no sensor response points back to the sensor or wiring.
– If wiring and sensor are sound but the PCM output remains absent, the module may need re‑flashing to correct corrupted calibration data. Re‑programming typically costs $150‑$250 for labor and software.
– When the driver is confirmed defective, replacement of the PCM is the most reliable solution. A new PCM, pre‑programmed to the vehicle’s VIN, usually runs $600‑$900 plus $150‑$250 labor.
After repair, clear all diagnostic codes and perform a drive cycle. Re‑scan to ensure P2614 does not return. If the code reappears, repeat the diagnostic steps to rule out intermittent wiring issues.
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.