01 What Causes the Check Engine Light to Come On? • 02 How Mobile Mechanics Are Changing the Industry (And Making … • 03 Ways to Avoid Knocking in an SI Engine When the Compression… • 04 The Latest Advances in Shipbuilding: How Technology is Shap… • 05 Why the Automotive Industry Is Changing Faster Than Ever • 06 The Risks of Driving at Low RPMs: How to Avoid Engine Damag… • 07 Ford’s Iconic Blue Oval Logo Gets a Refresh • 08 How to make a successful business: A long educative story • 09 Mastering Motorcycle Hand Signals for Effective Communicati… • 10 I braked and a car hit me from behind who's fault is it? •

DTC codes / P00xx · Fuel and air metering and auxiliary emission controls / P001E

P001EA Camshaft Profile Actuator A Control Circuit Low Bank 2

P001E indicates that the powertrain control module (PCM) has detected an abnormally low voltage on the control circuit for the bank 2 camshaft profile actuator, which is the solenoid that moves the camshaft to change valve lift or timing. The PCM commands a specific current to the actuator and monitors the circuit; when the voltage stays below the expected threshold, it sets this code because the actuator cannot be controlled properly.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaFuel and air metering and auxiliary emission controls

Symptoms you may notice

  • Illumination of the check engine light, often with no other noticeable symptoms
  • Rough idle or engine misfire, especially when the engine is cold
  • Reduced engine power or sluggish acceleration due to incorrect valve timing
  • Poor fuel economy because the engine is not running at its optimal valve lift profile
  • In rare cases, a no-start condition if the actuator fails in a position that prevents normal combustion

Common causes, most likely first

  1. Open or shorted wiring in the control circuit between the PCM and the actuator, often due to chafing or corrosion
  2. Failed camshaft profile actuator solenoid, such as a burned-out coil or stuck plunger
  3. Poor electrical connection at the actuator or PCM connector, including loose pins or water intrusion
  4. Low oil pressure or sludge buildup preventing the actuator from moving freely, which can indirectly affect circuit feedback
  5. Faulty PCM driver for that circuit, though this is less common than wiring or actuator failure

How to diagnose and fix it

  1. Perform a visual inspection of the actuator and its wiring harness for obvious damage, corrosion, or loose connectors
  2. Use a scan tool to command the actuator on and off while watching live data to confirm the circuit responds as expected
  3. Measure resistance and voltage on the control circuit at the actuator connector and compare with manufacturer specifications
  4. Check for continuity and short-to-ground on the signal wire between the PCM and actuator, repairing any damaged sections
  5. Swap the bank 2 actuator with a known-good unit from bank 1 (if accessible) to see if the code follows the actuator
  6. Verify oil condition and pressure, as contaminated oil can cause actuator sticking that mimics an electrical fault
  7. If all wiring and the actuator test good, diagnose the PCM driver circuit or replace the PCM as a last resort

Don't overlook oil condition and wiring chafe

  • A low-voltage code for a camshaft profile actuator is often caused by a simple wiring chafe where the harness rubs against a bracket or heat shield, not by a failed actuator.
  • Sludged or incorrect-viscosity oil can make the actuator mechanically sticky, which may cause the PCM to see unexpected current draw and set a circuit code even though the electrical parts are fine.
  • Technicians sometimes replace the actuator only to find the connector pins are pushed back or corroded, so always perform a pin drag test and inspect the terminals closely.
  • This code does not always mean the actuator is defective; a weak battery or charging system issue can cause low voltage on the control circuit during cranking or low-rpm operation.
  • On some engines, the bank 2 actuator is difficult to access, and a misdiagnosed wiring repair can be caused by a damaged harness section hidden behind the intake manifold.

Can I keep driving with P001E?

You can usually drive the vehicle short distances to a repair shop, but avoid aggressive acceleration or heavy loads because incorrect valve timing can cause misfires and potential engine damage. If the engine runs very rough or stalls, stop driving and have it towed to prevent further problems.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage