P001D — "A" Camshaft Profile Control Circuit/Open Bank 2

OBD2 code P001D flags a problem with the camshaft position and variable valve timing ("A" camshaft profile control circuit/open bank 2). Short, gentle driving to a shop is usually possible. Common culprits: faulty camshaft position sensor, worn cam phaser, low or dirty engine oil affecting VVT.

powertrain (engine/transmission)

Is it safe to drive?

Prompt diagnosis recommended P001D does not usually require an immediate shutdown, but impaired Bank 2 cam-profile control can affect power, emissions, and engine operation. Avoid extended driving if there is misfire, severe shaking, overheating, or an oil-pressure warning; otherwise, schedule diagnosis and repair soon.

Typical symptoms

Check engine light illuminated with P001D stored
Rough idle, uneven running, or hesitation during acceleration
Reduced engine power or slow throttle response
Increased fuel consumption
Occasional ticking or other unusual valve-train noise
P001D may be the only noticeable symptom on a healthy-running engine

Common causes

Open or chafed wiring in the Bank 2 camshaft profile control circuit
Loose, corroded, or oil-contaminated terminals at the cam-profile control valve or actuator connector
Failed Bank 2 camshaft profile control solenoid or actuator with an internally open circuit
Interrupted power feed or poor ground to the camshaft profile control component
A failed engine control module driver responsible for the Bank 2 cam-profile control output

How to diagnose with an OBD scanner

Confirm P001D and freeze-frame data Connect an OBD2 scanner using an ELM327 adapter or use AIScanAuto. Read stored and pending codes, confirm P001D, and save freeze-frame data to determine whether the fault occurred during startup, idle, or acceleration.
Inspect the Bank 2 wiring and connector Examine the harness and connector for the Bank 2 camshaft profile control valve or actuator. Look for damaged insulation, chafing, loose terminals, heat discoloration, corrosion, and oil contamination.
Check oil and circuit operation Verify the engine oil level, condition, and required specification. Using the service wiring diagram, test the component's power, ground, and signal paths for continuity and shorts rather than guessing at pin values.
Isolate the control component If the wiring and connections pass, test the Bank 2 cam-profile control solenoid or actuator according to the manufacturer procedure. If the scanner supports bidirectional actuator testing, use that function; resistance alone may not provide a conclusive result.
Repair and verification road test Repair the open wiring or replace the confirmed faulty control component. Clear P001D with the scanner, perform a complete drive cycle under varied load, and rescan to verify that the code does not return.

Approximate repair cost

Typical independent-shop cost for diagnosing and repairing P001D is approximately $180-$900 USD. A wiring or connector repair is generally near the lower end, while replacement of a cam-profile control valve or actuator is usually higher. These figures are estimates and vary by region.

Common questions

What component does P001D identify?

P001D identifies an open or control-circuit fault involving the Bank 2 camshaft profile control system. The fault may be in the wiring, connector, control valve, actuator, ground, or control-module output.

Does P001D mean the camshaft position sensor is defective?

Not necessarily. P001D describes the Bank 2 cam-profile control circuit/open condition, while a camshaft position sensor normally has a separate DTC. The control circuit and actuator should be tested before replacing a sensor.

Can I continue driving with P001D stored?

Short-distance driving may be possible if the engine runs smoothly and no oil-pressure, overheating, or misfire warnings appear. Continued operation is not recommended because incorrect cam-profile control can increase drivability problems and possibly damage the actuator.

Will clearing P001D with a scanner repair the fault?

No. Clearing P001D only removes the stored code from the scanner and control module memory. If the open connection or failed component remains, the code will normally return after the relevant operating conditions are repeated.

When your check engine light comes on and a scan tool pulls code P001D, it means the engine control module has detected a problem with the camshaft profile adjustment system on the engine bank that does not contain cylinder one. The technical label for this fault is ""A" Camshaft Profile Control Circuit/Open Bank 2," which falls under the powertrain category of diagnostic trouble codes. In plain terms, the variable valve timing (VVT) system on that specific cylinder bank is either not responding to commands or has lost communication entirely.

Modern engines use VVT to optimize valve timing for power, efficiency, and emissions across different driving conditions. The system relies on oil pressure to actuate a phaser that adjusts camshaft position relative to the crankshaft. When the ECU commands a change and the actual cam position does not match within a specified tolerance, P001D sets. The module does not trigger this light from a single bad reading; it requires the fault to appear repeatedly under specific operating conditions before illuminating the warning lamp. The freeze frame data stored alongside P001D is invaluable—it records engine load, RPM, coolant temperature, and vehicle speed at the moment the fault occurred, giving you a precise starting point for diagnosis.

Bank two refers to the engine bank opposite cylinder one. On V-type engines, this is easy to identify. On inline engines, manufacturers still designate a bank for diagnostic purposes, so consult your service manual to confirm which side your engine labels as bank two before proceeding with any testing or repairs.

Symptoms of P001D

The symptoms you experience with P001D vary depending on how severely the VVT system has failed.

Noticeable loss of engine power, especially under acceleration
Fuel economy drops noticeably compared to normal driving patterns
Extended cranking time when attempting to start the engine
In extreme cases, the engine may fail to start entirely
Rough idle with uneven running and poor low-end torque response

Common Causes

Several issues can trigger this code, ranging from simple maintenance oversights to mechanical failures.

A worn or stretched timing chain, broken timing belt, or jumped timing marks
A stuck or oil-clogged VVT solenoid valve preventing proper hydraulic actuation
A mechanically worn cam phaser that can no longer hold position
A faulty camshaft position sensor sending incorrect or intermittent signals
Damaged wiring, corroded connectors, or a damaged reluctor ring on the cam sensor

Diagnosing P001D

Effective diagnosis follows a logical order from least to most invasive and expensive.

Connect an OBD2 scanner, verify P001D is present, and record all freeze frame data before clearing anything—this snapshot tells you exactly what conditions caused the fault.
Look for any related diagnostic trouble codes stored at the same time; these often point directly to the root cause. Check manufacturer TSBs for your specific make, model, and year—many VVT-related codes have documented factory fixes or calibration updates available through official service channels.
Perform a visual inspection of the wiring harness and electrical connectors related to the camshaft position sensor and VVT solenoid, looking for damaged insulation, corrosion, broken pins, or loose connections.
Check engine oil level and condition immediately; VVT systems operate through oil pressure, and low or contaminated oil is a common culprit for cam phaser issues.
Monitor live data while revving the engine and compare the commanded cam advance or retard angle against the actual reading—if they diverge significantly, the problem lies in the hydraulic or mechanical side of the system.
Clear the code, complete a full drive cycle that recreates the freeze frame conditions, and verify P001D does not return.

Repair Options and Costs

P001D repair costs span a wide range depending on which component has failed. Independent shop labor rates typically apply.

Timing chain or belt replacement with necessary tensioners: $800–$2,500
Replacement of the VVT oil control valve (solenoid): $200–$500
Replacement of the camshaft position sensor: $120–$350

Always pursue the cheapest likely causes first—a faulty sensor or clogged solenoid is far more common than a failed timing chain and costs a fraction to repair.

Total Repair Cost for P001D

Across all possible repair scenarios, fixing P001D typically costs between $120 and $2,500. A proper diagnosis before purchasing parts is essential; spending money on expensive components when a simple sensor or solenoid fix resolves the issue wastes both money and time. The most severe repair scenario—timing chain replacement—should be your last consideration, not your first.

Can You Drive with P001D?

Exercise caution if P001D is active. The engine may run poorly, exhibit reduced power, or enter a failsafe mode that limits RPM and throttle response. If the timing has actually jumped due to chain or belt failure, continued operation on interference engines risks catastrophic valve and piston damage. Diagnose the issue before any long trip and address it promptly to avoid more costly repairs down the road.