P0009 Code- Engine Position System Performance Bank 2

What Does Code P0009 Mean

P0009 is a generic OBD-II code indicating an issue with the engine control module (ECM) detecting a variation in the mechanical timing between the crankshaft and bank 2 camshaft.

The ECM uses sensors to detect the position of the crankshaft and camshaft(s). From these sensor signals, the ECM controls ignition and fuel timing under various speeds and loads. The code will illuminate the Check Engine Light and possibly reduce engine performance.

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Possible symptoms

• Engine Light ON (or Service Engine Soon Warning Light)

Possible causes

• Engine mechanical problems
• Incorrect timing chain
• Stretched timing chain
• Failed camshaft actuator or actuator solenoid

Troubleshooting P0009

It does one good to note that this typically not a sensor problem, since the ECM can only use good sensor readings to determine whether or not the engine is in time. In other words, if a CMP is bad, it cannot check for good timing between that CMP and the CKP.

That having been said, diagnosing timing problems may best be left to the professionals, particularly if your vehicle is still covered under warranty. Always double check warranty application before opening up something as critical as the timing covers. With an up-to-date repair manual, experienced DIYers may be able to diagnose this problem, though the availability of special tools may limit repair ability.

• Depending on the model, at least the top timing cover or the valve cover(s) will have to be removed in order to see the timing marks. Rotate the crankshaft pulley clockwise until it’s timing mark is at 0° or TDC. If you cannot see the camshaft timing marks at all, then you’ll need to rotate the crankshaft another 360°. Once the crankshaft is rotated to TDC and you have the camshaft timing marks in view, you can verify their positions.
  • If the camshafts are aligned properly, suspect a crankshaft or camshaft reluctor ring problem, which could be skewing CKP or CMP readings. Further disassembly will be required to verify that reluctor rings are properly aligned to their respective shafts.
  • If the camshafts are not aligned properly, suspect a skipped or stretched timing belt or timing chain. Loose or worn timing belt or timing chain tensioners can also cause a misalignment problem. Further disassembly will be required to verify proper belt or chain position, tensioner function, and measure the timing belt or timing chain.
    • In case the timing belt or timing chain has skipped a tooth, it will need to be reinstalled properly.
    • In case of stretched timing belt or timing chain, it will need to be replaced.
    • In case of a worn tensioner, it will need to be replaced.

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