Q: My 99 Chevy tahoe vortec 5.7l has a code p0300 random misfire what code this be?

asked by on

My engine light came on and is said it was a code p0300 random misfire what could this be?

My car has 201354 miles.
My car has an automatic transmission.

Hi Demario. Thanks for contacting us today. In a modern combustion engine, if more than one cylinder misfires, this will increase or decrease the revolutions per minute (RPM) of the crankshaft. If that increase and/or decrease is more than 2 percent, the Powertrain Control Module will store the P0300 trouble code. If the percentage of the increase or decrease in revolutions per minute (RPM) is between 2 percent and 10 percent, the Check Engine Light will come on. If the percentage of the increase or decrease in revolutions per minute (RPM) is greater than 10 percent, the Check Engine Light will blink on and off, as to alert the driver of a more serious misfiring problem. There are multiple possible sources that you can review by clicking this link to the P-0300 OBD-II error code article we have posted.

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. My 99 Chevy tahoe vortec 5.7l has a code p0300 random misfire what code this be?

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: Q: Ticking sound from engine

Ticking is usually valve train related. Your engine has hydraulic lifters, they are self adjusting. One thing that can go wrong is the rocker stud can pull out of the head. They are pressed in originally. Check the nuts have...

Q: Leak in heater core

Hello! That is a common problem with your particular vehicle. The heater core is made of a brass and aluminum material which is known to crack under the "heat stress" it endures. Luckily heater cores are rather inexpensive to purchase...

Q: Brake pedal goes 3/4 way to floor

Hello there. This is a more unusual problem, especially given the amount of parts you have replaced. In most cases, the pedal travel is due to either the master cylinder or the brake booster, sometimes both. Given that these...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...