Q: Misfiring and p0300 code
My car started misfiring and found a coolant leak at my coolant elbows or water pump bypass elbows could replacing these fix my misfire
My car has 143000 miles.
My car has an automatic transmission.
Recommended Services
| Coolant is leaking Inspection | $94.99 - $114.99 | Get a Quote |
| Camshaft Position Sensor Replacement | $119.59 - $907.58 | Get a Quote |
| Crankshaft Position Sensor Replacement | $120.83 - $900.50 | Get a Quote |
| Engine is misfiring Inspection | $94.99 - $114.99 | Get a Quote |
It may be possible the misfire is from coolant leaking onto the plug wires. You will need to fix the coolant leaks first and at the same time make sure the camshaft and crankshaft position sensors did not get coolant in their connectors. I’d suggest cleaning them out and applying dielectric lube to connections.
If you need some assistance with this, consider getting help from a local mechanic or a mobile technician from YourMechanic. They will be able to help diagnose your misfire and make the necessary repairs to get you going again. Good luck!
The statements expressed above are only for informational purposes and should be independently verified. Please see our
terms of service
for more details
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
What others are asking
How do I adjust the steering wheel of a 2012 Hyundai Elantra?
The steering wheel can be adjusted to fit your liking. Before driving, you should always adjust the steering wheel by following these steps: 1. Push down on the Lock Release knob until it locks into place. 2. Adjust the height,...
White smoke coming out of car
Hello. Depending on what the smoke looks like and also depending on what fluids you are losing would help me to determine the problem. If the smoke has a blue cast to it then it may be burning oil. If...
Brakes heating up and locking
The brakes dragging could be from several causes. A full service of any components, such as the booster or master cylinder could have not been adjusted properly when installed. It is also possible that the brake calipers are binding. I...
Clutch won't engage
Sounds like the clutch disc has been burned out. You will need to replace the clutch, pressure plate, and release bearing. Have the vehicle serviced by a certified mechanic, they will be able to diagnose and fix your clutch issue...
Engine shuts off while braking
Hello. If your vehicle has stalled, and will no longer turn over then it may possible that the alternator has failed. A faulty alternator (https://www.yourmechanic.com/services/alternator-replacement) will not be able to properly charge the battery. This will place a drain on...
1st and 2nd I lost 3rd and 4th actually goes into neutral in 3rd and 4th
I don't think it has to do with your speedometer. The speedometer cable that goes to your speedometer has a sensor on the opposite side but the sensor isn't big enough to cause damage to your transmission. I would check...
car won't start: electrical problem
Even a relatively new battery can be bad. If it has an internal short, a jump start may not even work to start the vehicle. try removing the battery and taking it to a local auto parts store, or where...
So my traction control light was flashing on the highway then stayed on I pulled over turned off the car checked my wheels I didn'
Traction control involves wheel speed sensors, the ABS system, and electronic controllers. If there is a problem with the traction control system on your vehicle, diagnostic trouble codes are stored and those codes will provide the mechanic with the necessary...
If a left cv axle is bad, would you lose power to the wheel? Would it also effect the right side?
The CV axle is just a shaft with joints on each end. The axle will transmit whatever power is applied to it but if the splines on the shaft are sheared off, or a joint is physically broken (separated), the...
Related articles
The Best Used Cars to Buy If You’re a Painter
If If you’re a painter, and you work for someone else, chances are you don’t care all that much about what you drive, as long as it gets you to and from work reliably. On the other hand, if you...
The Best Used Cars to Buy That Can Be Towed Behind an RV
Summer Summer is a great time for a road trip, but often travelers like bringing all the conveniences of home along, in the form of an RV. Then they tow their car behind it – sometimes this practice is called...
Symptoms of a Bad or Failing Ignition Cable
Common signs include a decrease in power, acceleration, and fuel efficiency, the Check Engine Light coming on, and visible damage to the cables.
Browse other content
Cities
Services