P0357 - OBD Trouble Code

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The P0357 fault code can be defined as Ignition Coil “G” Primary/Secondary Circuit Malfunction. The last digit to this fault code would indicate that there is a problem which is detected within the ignition process of cylinder number 7. The coil is a transformer which would revamp the lower voltage supplied by the battery into the higher voltage that spark plugs need to ignite the fuel for a successful combustion process. On an average 70,000 to 100,000 volts are produced by a coil pack on average.

This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another.

This can happen because of a lot of reasons and the mechanic should diagnose the specific cause for this code.

What causes this problem with the Ignition Coil “G” Primary/Secondary Circuit Malfunction?

• Issue of wildlife chewing through wires or otherwise interrupting their performance
• Some faults in the ignition coils
• There can be open or shorted wiring in the ignition coil driver circuit
• Flaws in the powertrain control module
• The coil can turn out to be bad
• Faults in the connector locks
• Problem of bad connection at the coil
• A COP driver circuit might be open
• Quirks in the ignition coil 7
• Ignition Coil 7 harness might be opened or shorted
• There can be poor electrical connection in the ignition coil 7 circuit

1. Ignition Coil - A faulty Ignition Coil can be troublesome. You can always rely on us as we have best auto parts for our customers.
2. Powertrain Control Module - If everything is alright with Ignition Coil, then there is surely some defect in Powertrain Control Module. Get it replaced before the situation gets worse.
3. Engine Control Module - P0357 code can display due to some issues in the Engine Control Module. So it is very important to replace the Engine Control Module with us at equitable prices.
4. Fuel Ignition System - Do you remember when was the last time you got your car Fuel Ignition System checked up? A defected Fuel Ignition System can cause a lot of issues like displaying P0357 code.
5. Engine Wiring Connector - Poor Engine Wiring Connector can cause a lot of difficulties, so why not get it replaced at time?
6. Spark Plug - There can be some issues with the Spark Plug due to which you may see P0357 code appearing over and over again. Visit us to buy best quality Spark Plug online.
7. Electronic Control Unit - Are you facing some faults in your Electronic Control Unit? Don’t worry and get them replaced or else P0357 code can turn up.
8. Throttle Body - Common cause behind this P0357 error code can be some fault in Throttle Body. So it will be a good decision to replace them now.

It is vital to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P0357 here:

Common Symptoms

• Car engine misfire on acceleration
• The malfunction indicator lamp can start appearing
• There can be lack of power in the engine, especially under heavy load
• There can be an issue that the engine might idle roughly
• There can be hard to start condition of the engine
• Engine can start hesitating

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

• You should replace the spark plugs and spark plug wiring
• Defective ignition coil should be replaced
• If there are some faults in the wiring in the coil pack, then it should be repaired or replaced as per the need
• Carefully repair the vacuum leaks such as leaks in the cracked vacuum line or intake manifold gasket
• The damaged PCM should be replaced

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Here are some steps which you should follow in order to diagnose this fault code:

If you want to diagnose the problem regarding a P0357 code, then your mechanic will most likely use an oscilloscope, along with a scanner and an ohmmeter. This will allow them to measure the voltage that’s causing the problem. They should also inspect the coil itself and, potentially, the others too.

A visual inspection of the other electrical components should also be carried out. If the engine has been misfiring, they’ll also need to examine it to see if this problem is related or caused by something else. This can be done by slowly raising the RPMs while the vehicle is kept stationary and seeing if the backfire occurs.

Common Mistakes When Diagnosing The P0357 Code

A simple maintenance tune-up would be helpful to solve this issue. Make sure that you carry out a thorough diagnosis so that you are able to know the real reason behind the malfunction. If you will just assume, then it would lead to wastage of time as well as money. So be very careful.