What does P0302 mean?
misfires
P0302 indicates that cylinder number 2 is experiencing misfires. A misfire occurs when an insufficient amount of fuel is burning in a cylinder. The efficient burning of fuel is essential to engine operation as the combustion of fuel is what provides the energy to power the engine.
What causes a random cylinder misfire on a Lexus?
Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 Lexus code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.
What does the Diagnostic Code mean on a Lexus P0300?
Basically this means that the the car’s computer has detected that not all of the engine’s cylinders are firing properly. A P0300 Lexus diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring.
What happens when a Lexus trouble code is not cleared?
If the diagnostic trouble code is not cleared, it will be retained by the ECU and appear along with a new DTC in future trouble codes. If it is necessary to work on engine components requiring removal of the battery ground cable, confirm no DTC’s are stored.
What to do if a multi cylinder misfire is detected?
Start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. If no leak are found the next step is to replace the spark plugs. If the problem persists more tests needs to be done to diagnose problem, see “Possible Causes”
What does it mean when your Lexus engine misfires?
Misfires can be unnerving. In some cases, they mean a Lexus owner might be looking at a very expensive engine re-build. In most cases, luckily, there is a simple and much less expensive remedy.
What does a check engine light on a Lexus mean?
If the Lexus has been misfiring for long enough, it will have probably thrown a check engine light. The light means the Lexus has a diagnostic trouble code stored on its ECU. An easy way to retrieve those codes is by using an OBD-II scanner.
Why does my Lexus have a compression problem?
If the cylinder reads 5% or lower than the others, there’s a compression problem. Common causes of compression problems include damaged valve seats, cracks or gouges in the cylinder wall, and damaged piston rings. Figure 4. A damaged cylinder.
Where are diagnostic codes stored on a Lexus?
The light means the Lexus has a diagnostic trouble code stored on its ECU. An easy way to retrieve those codes is by using an OBD-II scanner. Otherwise, take the vehicle to an auto parts store, Lexus mechanic or Lexus dealership, and have them tell you what the codes are. Typically, a misfire triggers the following codes: