P0013

Universal

Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)

Definition source: General OBD-II reference catalog
Definition verification: Not independently verified for display.
Time: Varies by diagnosis and vehicle | Diagnostic difficulty: Medium
Medium Severity

The engine computer monitors the electrical circuit for the exhaust camshaft position actuator on Bank 1. This actuator helps adjust exhaust cam timing. The code means the circuit is detected as open or not electrically connected as expected; it does not by itself prove the actuator needs replacement. Depending on the vehicle and the fault, engine performance or drivability may be affected, or there may be no noticeable symptoms.

Report an error with this code

⚠️ Before You Begin (Safety First)

If the engine stalls, runs very roughly, loses power, or is difficult to control, stop driving when it is safe and arrange an inspection. If the vehicle runs normally, avoid hard driving and have the fault diagnosed soon. Stop and seek assistance if a warning light flashes or another serious warning appears.

Common Symptoms

  • The check-engine light may be on because the engine computer detected an electrical fault in the actuator circuit.
  • There may be no noticeable symptoms if the engine continues to operate acceptably despite the detected circuit condition.
  • Rough idle or uneven running may occur if exhaust cam timing is not adjusted as expected.
  • Reduced power or sluggish acceleration may occur if the engine cannot achieve the intended cam timing.
  • Hard starting or stalling may occur in some cases if the timing-control fault significantly affects engine operation.

Common Causes

  • A damaged, disconnected, or poorly seated connector can interrupt the actuator circuit.
  • A broken, damaged, or corroded wire can create an open circuit.
  • The exhaust camshaft position actuator's electrical winding or internal connection may have failed.
  • A fault in the circuit's power, ground, or control path may prevent the expected electrical connection.
  • A control-module fault is possible, but should be considered only after the actuator and its wiring have been tested.

Diagnostic Steps

  1. Check whether the engine is running roughly, stalling, or losing power. If it is difficult to control, stop driving when safe and arrange assistance.
  2. With the engine off and cool, visually inspect accessible wiring and the connector at the Bank 1 exhaust camshaft position actuator for damage, looseness, corrosion, or signs of contact with hot or moving parts.
  3. Confirm that the connector is fully seated. Do not force it or pull on the wires; consult vehicle-specific service information if access or connector handling is unclear.
  4. Use a compatible scan tool to note the code and any related codes before clearing anything. Related faults can help distinguish an isolated circuit issue from a broader timing-control problem.
  5. If the code returns or the checks do not reveal an obvious issue, have the actuator circuit tested using the wiring diagram and procedures for the exact vehicle. Avoid replacing parts based on the code alone.

When to Call a Professional

A technician can compare scan-tool data with the exhaust cam actuator command, inspect the connector and wiring, and test the actuator circuit against the vehicle-specific wiring diagram. The diagnosis should distinguish an open in the wiring or connector from an actuator fault or a control-side problem before parts are replaced.

Compare component listings

Confirm diagnosis and vehicle fitment before buying. A listing does not prove that a part needs replacement. We may earn a commission from qualifying purchases.

Search Amazon Search eBay

Commonly Asked Questions

Does P0013 mean the actuator itself has failed?

No. It identifies an open or unexpected electrical condition in the Bank 1 exhaust camshaft position actuator circuit. The connector, wiring, actuator, or control path may be responsible.

Can I keep driving with P0013?

That depends on how the engine runs. If it stalls, runs very roughly, or loses power, stop driving when safe. If it runs normally, arrange diagnosis soon and avoid hard driving.

Why can the code appear when there are no noticeable symptoms?

The engine computer can detect a circuit problem even when the engine still runs acceptably. Symptoms depend on how the fault affects cam timing and engine operation.

What should be checked before replacing the actuator?

Inspect the connector and wiring, then test the circuit and actuator using the correct vehicle-specific information. A scan-tool check of actuator commands and related data may also help identify where the fault lies.

Related Diagnostic Video

Browse Available Code Guides

Previous and next available guides in database record order, across makes. Adjacent entries may share a code number and do not necessarily describe related faults.