P0353 Code - Ignition Coil 3 Primary/Secondary Circuit Malfunction

What Does P0353 Mean?

The PCM has detected a fault in the primary or secondary circuit of one or more ignition coils. The majority of OBD-II equipped vehicles utilize a “coil on plug” system to provide ignition spark. In this system, an ignition coil is secured to the engine in a manner that allows for the use of a small spark plug wire or plug boot. Each ignition coil is electronically controlled by the PCM.

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What are the common causes of P0353 ?

To sum things up, the common causes for code P0353 are as follows:

• Faulty ignition coil
• Problem in the ignition coil circuit
• Problem with the PCM

How do you troubleshoot P0353 ?

When the code P0353 is set in the Powertrain Computer, it means that the Powertrain Computer or PCM is not seeing the proper electrical signals from the ignition coil(s) during normal operation. This can be caused by problems on either the primary (computer) side or the secondary (spark plug boot, spark plug wire and/or spark plug itself ) side.

When diagnosing a P0353 code, it is important to record the freeze frame information and then to duplicate the code setting conditions with a test drive. Pay close attention to the engine load, throttle position, RPM, and road speed. Road test the vehicle while viewing the misfire PID information on a data streaming scanner. If the vehicle is misfiring then you may have verified code P0353. Be sure to verify the the steadiness of the crank signal, because this can cause all kinds of downstream problems. If the vehicle deploys a multiple direct coil ignition system, locate the offending coil. Switch the entire coil and spark plug as an assembly with a known good cylinder, Clear the code(s) and go for a test drive. If the code re-sets and follows the coil assembly that was moved, then you may have verified the cause of the P0353 code. If the same cylinder sets the code, then perform a compression test on the offending cylinder and check for any vacuum leaks in its area with a good quality smoke machine. If the compression and smoke test results are good, then check the connector and wiring for that cylinder's coil circuit. If the connector and circuitry are good, then test the coil firing signal with a labscope, because the coil driver circuit may be defective.

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