P2C14: B Camshaft Profile Actuator Position Sensor A Circuit Low Bank 1

What it means

The control module detects a low signal from camshaft profile actuator position sensor A on bank 1. The signal does not reliably indicate the actuator’s position.

At a glance

• Usually lights the check-engine light
• Affects emissions; the car can fail an emissions test
• The engine or gearbox may go into limp mode

How it works

The B camshaft profile actuator changes the cam profile, and sensor A on bank 1 reports its position to the control module. This code sets when the sensor A circuit voltage is lower than expected, so the module cannot read the actuator position reliably.

Common causes

Most likely first.

1. Signal wire shorted to ground
2. Internal sensor short
3. Connector pins corroded - high contact resistance

Symptoms

• Check engine light on
• Power loss especially in mid-rpm range
• Possible rough idle or stalling
• Increased fuel consumption

How to diagnose it

1. Save freeze-frame data and check live sensor A position data to determine whether the low signal is constant or occurs only under certain conditions.
2. Inspect the bank 1 sensor A connector and wiring for corrosion, pin damage, chafing, or contact with ground.
3. Check the sensor A signal circuit for a short to ground, following the manufacturer’s circuit isolation procedure.
4. Measure the sensor’s supply and ground, then check signal-wire continuity and connector contact condition against service information.
5. If the wiring and supply pass, test sensor A itself and confirm the bank 1 actuator can move through its range.

Common fixes

• Clean corrosion from the sensor A connector and restore sound terminal contact.
• Repair a signal wire shorted to ground or other damaged wiring in the bank 1 sensor A circuit.
• Replace sensor A if it internally pulls the signal low.
• Repair the bank 1 actuator if it also fails its movement checks.

Can I keep driving?

Keep trips short and avoid hard acceleration because the low sensor A signal can leave cam-profile control unreliable, causing power loss or stalling. Stop driving if the engine repeatedly stalls or runs roughly.