P0324 Code - Knock Control System Error

Discussion in 'P - Powetrain Codes' started by fault code, Dec 26, 2017.

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  1. fault code

    fault code Administrator Staff Member

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    What Does P0324 Mean?

    OBD-II Code Powertrain Control Module (PCM) failure is defined as a Knock Control System Error
    The knock sensor tells the engine control module (PCM) that the engine has an excessive vibration resulting from an incorrect fuel and air mixture. If the PCM does not receive a signal from the knock sensor, it will set code P0324. The check engine light may or may not be illuminated.

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    What are the common causes of P0324 ?

    Depending on year, make, and model, DTC P0324 may have number of causes. Here are some of the most common.
    • Performance Engines – To extract the most amount of power from the fuel, performance engines generally run right at the edge of knock threshold, which means that if anything is off, such as low fuel octane, high engine temperature, or engine sludging, it will knock more than usual.
    • Overheated Engine – If the engine is overheating, fuel will vaporize and detonate much easier. A stuck thermostat or low coolant level or flow could cause excessive engine knocking. Burning engine oil, an EGR leak, or incorrect spark plug could also cause overheating.
    • Low Octane Fuel – Some engines are recommended to run a higher octane fuel than others, which means an extra expense on the part of the owner. To save a few bucks at the pump, one might opt for the cheaper grade, which sets the engine knocking all the time, particularly on acceleration. Some ECMs can put up with this, while others can’t. Always use the fuel recommended by the automaker for your specific year, make, model, and engine.
    • Lean Condition – A fuel trim problem, such as a vacuum leak or clogged fuel injector, could also cause excessive engine knock.
    • Severe Service – Car subjected to severe service, such as years of stop-and-go traffic, may develop carbon deposits in the cylinder, leading to hot-spots, which can cause engine knock.
    How do you troubleshoot P0324 ?

    If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed.



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