Engine-Codes - Toyota - P0300 TOYOTA

P0300 TOYOTA - Random Cylinder Misfire Condition

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0300 TOYOTA Possible Causes

  • Faulty spark plug (s)
  • Faulty ignition coil (s)
  • Clogged or faulty fuel injector (s)
  • Intake air leak
  • Fuel injectors harness is open or shorted
  • Fuel Injectors circuit poor electrical connection
  • Ignition coils harness is open or shorted
  • Ignition coils circuit poor electrical connection
  • Insufficient cylinders compression
  • Incorrect fuel pressure

How is the P0300 TOYOTA code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes

The P0300 code means that a cylinder(s) is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are commonly caused by multi-cylinder misfiring. If no leak is found the next step is to replace the spark plugs. If the problem persists more tests needs to be done to diagnose the problem, see "Possible Causes"

There is a factory service bulletin for the following Toyota models:

2000-2001 Toyota Camry
2000-2001 Toyota Solara
2000-2001 Toyota Solara, Camry Factory Service Bulleting OBDII Code P0300 Code

What is the cost to diagnose the P0300 TOYOTA code

Labor: 1.0

The cost to diagnose the P0300 TOYOTA code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

When is the code detected?

The control module monitors the crankshaft speed and has detected a misfire condition

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Lack/loss of power
  • Hard start
  • Engine hesitation

P0300 TOYOTA Meaning

When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.

More Information

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