Q: Secondary coil replacement for a 2007 ES 350 Lexus

asked by on

Check engine and VSC light on and code reader says fault po352-.how does one correct this fault?

My car has 69000 miles.
My car has an automatic transmission.

Hi there. That code is set when the primary or secondary circuit for the specified coil has failed. If you are not experiencing any drivability concerns, then it is most likely that the circuit has not failed to the point of misfiring. The code stored, P0352, specifies ignition coil B also known as cylinder #2 ignition coil. This coil is located on the left hand bank, towards the front of the vehicle, and is the first coil towards the passenger side.

Check the connector for looseness or broken wires and correct as necessary. Mark the top of the coil and swap it with another cylinder and recheck for codes to see if the code changes to the new cylinder. If it does change, then the coil is faulty. If it does not change, then swap the spark plug and repeat.

If no change is determined after swapping the plug and coil, then the wire harness or ECU may be at fault. These can be tested with a digital volt/ohm meter, scan tool that provides data, and the electrical wiring diagram. Check for an open/short circuit in the harness from the coil to the ECU and correct as necessary. If the harness is ok, or a repair is completed and the code returns after clearing, suspect the ECU.

I strongly suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. YourMechanic has several technicians available that can assist you with a Check Engine Light inspection and make the necessary changes.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Secondary coil replacement for a 2007 ES 350 Lexus

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Issues with the unlocking doors using a remote

Try to use another remote to see if the problem happens still with that remote. Sometimes the remote button sticks and only holding the button will allow the other buttons to work. If another remote is being used, make...

Q: My car won't detect my car key.

There is a technical bulletin 13-5-32 that covers this problem of no start with any key. The TSB says that the vehicle will need to have the anti-theft system radio transceiver module reprogrammed using the dealer IDS system with the...

Q: Truck won't start in morning. 2nd day now. Battery seems good.

Since the symptoms changed when you touched the battery terminal, it leads me to believe you may have a poor connection and the main battery terminals. If they are badly corroded or have any small cracks, the terminal may be...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...