Skip the auto shop - Our mechanics make house calls

Q: Engine is misfiring and Check Engine Light is on - 2002 Toyota Tacoma

asked by on

Vehicle engine occasionally starts missing and check engine light starts flashing.It will last for about approximately 5 min. I have had it checked by computer when it is running right and it says misfire on number 3 cylinder. I replaced coil,oxygen sensor,fuel filter,and plug tube set.The vehicle still has the same problem. Changed spark plugs also.

My car has 278000 miles.
My car has an automatic transmission.

Hello. A flashing Check Engine Light is a sign that the computer has detected an issue that could potentially damage the vehicle’s emissions components. I would recommend scanning the trouble codes when the light is flashing in order to determine if there is a serious issue.

If there is a misfire on cylinder 3, and you have replaced those components, a few other things I would look into are the fuel injector for cylinder 3, the mass airflow sensor, the fuel pressure, and for any possible vacuum leaks.

I recommend having a certified mechanic, such as one from YourMechanic, perform an inspection to determine why the engine is misfiring and why the Check Engine Light is on.

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!
  • Home
  • Questions
  • Engine is misfiring and Check Engine Light is on - 2002 Toyota Tacoma

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: The engine has no power and shakes a lot

Hello. If the engine is shaking that bad and has no power, then it may have a bad misfire. This can be caused by a bad spark plug, but it can also be caused by a bad sensor such as...

Q: Temperature gauge sits on cold always

This is a common issue on this generation of the Chevy Malibu. This could be any one of a few problems. This could be a result of a bad BCM (Body Control Module). This is a module in your car...

Q: Turn signals not flashing.

This is a common issue with many Ford vehicles. The faulty part would be your multifunction switch or turn signal switch. There is a mechanism that causes the switch to lock in place during a turn inside the switch that...

Related articles

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...
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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...