2010 Mazda B Series OBD2 Code P002A B Camshaft Profile Control Circuit/Open

Diagnostic Trouble Code (DTC): P002A

What the P002A code means

Engines operate by way of a system of moving parts that open the intake valves (for allowing gas into the cylinders) and exhaust valves (which carry the vapors away). The camshaft is part of this complex timing mechanism. Some 2010 Mazda B Series s have two camshafts – a separate one for the intake and exhaust valves; “B” is the designation for the exhaust camshaft. When there's a problem in the circuit controlling the camshaft, the timing between the crankshaft and the camshaft is affected. The PCM (powertrain control module) picks up on this discrepancy, triggering the P002A code to set.

What causes the P002A code?

There may be a variety of causes for this code:

• A faulty crankshaft sensor
• A faulty camshaft sensor
• Corroded or damaged sensor wiring
• A worn timing belt or timing chain
• A damaged or loose timing chain tensioner

What are the symptoms of the P002A code?

This fault may cause reduced power, the engine may run rough, or the engine may crank but not start. There is typically an illuminated Check Engine light as well.

How does a mechanic diagnose the P002A code?

A technician typically begins by hooking your 2010 Mazda B Series up to an OBD-II scanner in order to verify that the code is present, and check for other codes. This data along with freeze frame data is recorded, and the codes are then cleared to see if they reoccur. Next, there should be a visual inspection of the wiring and connectors to check for loose connections, corrosion, or shorts. A specialized tool may be used to test the camshaft sensor. Other tests of the crankshaft and camshaft components may help pinpoint the problem, as well as inspection of the timing chain or timing belt. If there is a physical problem with the timing belt this could cause the timing to go off far enough to trigger a code P002A.

Common mistakes when diagnosing the P002A code

Oftentimes the camshaft sensor is blamed, and replaced, without checking the timing chain or belt for damage or stretching. Because there can be several causes for this code, a complete inspection should be carried out in order to avoid repairs that may be unnecessary and more expensive.

How serious is the P002A code?

This is a fairly serious code due to its potential to affect how the engine runs and even its ability to start up. In addition, if your 2010 Mazda B Series is experiencing reduced power due to this fault, this can create a dangerous situation on the road should you need to move quickly to avoid an accident. Even if you aren't experiencing obvious symptoms, you should have this code investigated as soon as possible.

What repairs can fix the P002A code?

Repairing this code may require:

• Timing chain or belt tensioner replacement * Repair of the camshaft sensor wiring
• Camshaft sensor replacement
• Timing chain or belt replacement

Additional comments for consideration regarding the P002A code

Faulty wiring or connectors are often to blame for circuitry or sensor problems. If you don't have the proper tools to perform all of the tests necessary for a thorough diagnosis of a problem like a camshaft profile control circuit problem, don't hesitate to consult a qualified professional. Engine timing issues can be involved and complex, and your mechanic will have all the required scanners and other tools needed to make sure the correct components are repaired.

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