P0010 – “A” camshaft position actuator circuit/open

Modern engines use a variable valve timing system that responds to the conditions and performance of the engine. This makes them more efficient than the engines of the past, letting them run cleaner and reduce the harmful emissions they produce.

Controlling the engine timing requires a blend of your car’s electronic and mechanical components. The engine control module controls the timing itself. It then tells the various gears and valves how to respond to maintain peak engine performance.

When the timing in your engine fails, the P0010 code will trigger. The cause could be either electrical or mechanical. More often than not, it’s an indication of a poorly-maintained engine. Having said that, it can occur due to a mechanical failure even if you take excellent care of your vehicle.

P0010 can be tricky to diagnose since many systems could contribute to the failure. Please read on below to learn more about this pesky code and how to repair it.

P0010 code definition:

“A” camshaft position actuator circuit (bank 1)

Here's where you can get a thorough understanding of the P0010 OBD2 code
If you want to learn about the P0010 OBD2 code, this is the right place

What does P0010 mean?

This is a generic powertrain code that can occur in any vehicle that uses variable valve timing (VVT). Engines that use VVT adjust the power produced to the conditions you’re driving, allowing the engine to operate more efficiently.

A series of sensors provide the engine control module (ECM) information to adjust the engine’s timing. When the data it’s receiving doesn’t align with expected parameters, the engine’s timing can’t be adjusted to match the conditions.

If the ECM detects a difference between the timing of the bank 1 crankshaft and camshaft, the P0010 trouble code is triggered. Bank 1 is the side of the engine that contains cylinder 1. This issue will typically be detected when the engine is running at a higher RPM.

When P0010 triggers, it is often accompanied by other OBD2 trouble codes. The most common include P0011, P0012, and P0020-P0022.

If the timing between the bank 1 crankshaft and camshaft is off, the P0010 code is triggered
The P0010 code is triggered when there’s a difference between the timing of the bank 1 crankshaft and camshaft

What are the symptoms of the P0010 code?

You’ll be most likely to notice drivability symptoms associated with P0010 when you’re driving at a higher speed. In city environments, the symptoms are likely to be mild. They include:

  • Activation of the check engine light,
  • Reduced fuel economy,
  • Reduced performance at higher speeds,
  • Increase in harmful emissions,
  • Rough engine, especially when idling.

What are the causes of P0010?

  • Faulty oil control valve (OCV) or solenoid valve,
  • Short in the variable valve control circuit,
  • Faulty or damaged wires,
  • Oil sludge in the engine,
  • Faulty camshaft sensor or crankshaft sensor,
  • Worn components in timing system,
  • Missing update to ECM software,
  • Faulty ECM (rare).
The P0010 code can be caused by a faulty solenoid valve
Faulty solenoid valve can lead to the P0010 code

How serious is the P0010 code?

The P0010 OBD2 code is moderately severe. It won’t make your vehicle unsafe to drive, but it will increase your gas consumption and may not operate at full power. At the very least, you will need to have it repaired before your next emissions test.

How to diagnose the P0010 code

Tools you’ll need:


  1. Check for any released technical service bulletins related to the P0010 code for your vehicle’s make and model. Verify that your electronic system is the most recent update available.
  2.  Scan your system for other OBD2 trouble codes. If any come up, fix those first.
  3. Check the freeze frame data for the ECM. Identify the conditions in which the code was triggered. Conduct a test drive while reading the live data, attempting to replicate the conditions of the failure.
  4. Check the bank 1 VVT system to see if there are any frayed or loose wires.
  5. Inspect the mechanical components of the timing system for signs of wear or damage. The chains, guides, and gears can all fail over time and may need to be periodically replaced.
  6. Visually inspect the OCV or solenoid valve. Engine sludge and other build-ups can cause this component to fail. Remove it following the instructions in your vehicle’s manual, then clean it using a carburetor cleaner. Re-install the OCV, clear the codes, and test drive your car to see if the code recurs.
  7. Inspect your engine for oil sludge. Drain the oil and check it for sludge, as well. Sludge in the oil or outside your engine indicates a deeper problem with it inside the system.
  8. Use an ohmmeter to test the camshaft sensor and crankshaft sensor. Your user manual will tell you where these sensors are, as well as the resistance they should measure.

Common mistakes to avoid while diagnosing the P0010 code

Many inexperienced technicians replace the timing actuator as soon as they see this code, without checking for other issues first. Conduct a full diagnosis before making any repairs. You may onl need to clean a solenoid or replace a few wires.

What should you do to fix the code P0010?

  1. Replace any damaged wires or timing system components found in your inspection. Ensure all connections are tight and secure.
  2. Replace the camshaft sensor or crankshaft sensor if they failed the resistance test in step 7 of the diagnosis.
  3. If you detected sludge in your diagnosis, your engine needs cleaning. Remove any sludge on the exterior of the engine first. Next, drain your oil, flush your system, and replace the oil filter. Once you’ve put fresh oil in your system, clear the code and test drive your car. If the code comes back, continue with step 4.
  4. Replace the OCV or solenoid valve.
  5. If the code is still present, you may need to replace the timing sprocket or the actuator. These components are quite costly to replace, so you should rule out all other options before taking this step.
  6. Should a new timing sprocket or actuator still not clear P0010, there is likely an electrical problem with your ECM. Take your vehicle to a mechanic for further diagnosis.
How to fix the P0010 code

Tips to avoid P0010 in the future

Sludge build-up in the engine is one common cause of P0010, which happens when you don’t change your oil often enough. Ensure that you keep on top of your preventative maintenance schedule to keep your engine clean and running smoothly.

Read more: P0136 Code: Meaning, Symptoms, Causes, Diagnostics, and Fixes.