Skip the auto shop - Our mechanics make house calls

Q: Engine Light/ Maintenance Required/ TCS Light on

asked by on

Error Codes Read from OBD I: P0301/ P0302/ P0306/ P0300/ P1399. Engine light/ Maintenance required/ TCS light all on yesterday when start the engine. Not sure what is wrong. What kind of services and approx. how much it will cost to get it fix? Thank you.

My car has 142730 miles.
My car has an automatic transmission.

All these codes point to engine misfires. You should pull the spark plug wires to see if oil is on the spark plug wires causing the misfire. You would need to replace the valve cover gaskets and spark plug tube seals. Clean out the oil and replace the spark plugs and plug wires. If you need help with this, a certified professional from YourMechanic can come to your car’s location to diagnose the Check Engine Light codes in detail and perform the necessary services.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Acura TL 2006. car was sticking in park.. I spilled coke in the console area where the shifter is located 5 days ago... I thought

Well it's good that you can now move the shifter. However, pouring soda, water, or ANY liquid down the console is not a good idea. None of it has drained out for the car. It all went into or below...

Q: rough idle, heavy missing, fault codes P0301 and P0456. lack of power, where do i start to diagnose this?

Hi there. From the description you have provided, for the P0301 rough idle and heavy misfire and P0456 evaporative small leak detected, the problems are unrelated. The P0301 is a #1 cylinder misfire code. It could be, a spark plug...

Q: I want to what is the issue if the code number is P0306?

Hello there, many faults will cause a misfire in cylinder 6 with your 2007 Lexus LS460. You have done great in replacing the coil pack as these can defiantly cause the misfire. Other potential causes are the spark plugs, fuel...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.