P0352 - IGNITION COIL B PRIMARY/SECONDARY CIRCUIT MALFUNCTION

The Coil on plug ignition system is used in most engines today. It consists of an individual coil for each cylinder, which controls the Powertrain Control Module (PCM). With this system no spark plug cables are used, since the coil goes over the spark plug.

Each coil has two cables, one corresponding to a battery power supply, then where the energy is usually distributed. The other cable is the coil exciter circuit of the Power Train Control Module (PCM).

The Powertrain Control Module disconnects the circuit or grounds, in order to activate or deactivate the coil can ground or disconnect the circuit and thus enable or disable the coil. The circuit of the coil driver is continuously supervised by the Power Train Control Module for future problems. If a short is sensed in the exciter circuit of coil 2, the diagnostic code P0352 OBD2 is set.

• Check Engine light turns on.
• When you start the engine you may have a failure that could be persistent or intermittent.

The factors that can lead to the establishment of code P0352 OBD II are:

• There may be a short circuit to ground or voltage in the controller circuit of the ignition system, Coil in the plug (COP).
• The conductor circuit of the COP system may be short.
• The coil may have a loose connector.
• The coil may be defective.

To solve the fault code P0352 you can do the following:

• If your engine is not currently failing, it means that the problem is intermittent. That's why you can manipulate the cable. If when performing this manipulation the misfire appears, means that the dificulty is in the wiring. You can check if there is a poor connection in the connector of the coil or that any of the cables is not rubbing with any other component. Fix as necessary or change if warranted.
• In case you have a fault in the motor, you must turn it off and disconnect the wiring connector of coil number 2. Then, turn on the motor and check if there is a signal from the controller coil number 2, for this, you have to use a voltmeter of the AC Hertz scale and check if a reading between 5 and 20 Hz is present, which indicates that the controller is working. It replaces coil number 2. If, on the other hand, no frequency signal is detected by the PCM in the coil exciter circuit, implying in this way, that the Power Train Control Module is without a ground connection in the circuit, disconnect the coil and verify for direct current in the conductor circuit in the coil connector. In case of finding a significant voltage in that cable, it means that may be a short circuit to voltage. Locate the short circuit and then proceed to repair it.
• If there is no voltage in the connector circuit, turn off the ignition. Then disconnect the connector in the PCM and verify the continuity of the controller between the coil and the Powertrain Control Module. If there is no persistence, it indicates that there could be a short circuit to ground. You must repair it. But if there is continuity, check the residence between the ignition coil connector and the ground. The resistance must be infinite. If not, fix the short to ground in the circuit of the coil.
• You can replace the package of coil.