P0300, P0301, P0303 VEHICLE ACCTING LIKE IT HAS FUEL STARVATION ISSUE
SOURCE: start and diesss
p0456: evap system. sensor failure
p0172: evap system. intake blocked
p0778: exaust valve control. solenoid/ecu faukt
p0300: cylinders misfire. check ht/ignition leads
p0301,303,304,305,306: same ht leads
hope this helps..
SOURCE: get multiple misfire codes. P0300 - P0303. If this
This could be a coil problem but i would start by changeing the plug wires and checking each plug.
SOURCE: 2007 Tucson, has poor idle
When diagnosing the Continuously Variable Valve Timing (CVVT) system for rough idling, poor acceleration, camshaft timing misalignment-related trouble codes, misfire related trouble codes, and/or other related symptoms, it may be required to inspect the Follow the procedure to inspect the OCV. If the OCV operates normally, then carry out other necessary repairs. Do not replace the OCV if normal operation is confirmed. OCV SUPPLIER : COIL RESISTANCE AT 68°F (20°C) Denso 6.9~7.9 Ohms MEASURED RESISTANCE 68°F (20°C). RECOMMENDED ACTION 1.1. Denso (6.9~7.9 Ohms) 1.2. Delphi (6.7~7.7 Ohms) Check if the OCV operates normally by providing 12V power. (See the STEP 2.) 1.2. Infinity (OPEN): Open circuit - Replace the OCV. 2. Check if the OCV operates normally by providing 12V power as shown in the picture IMPORTANT: Careful attention is necessary to avoid a short circuit when providing the OCV with 12V power. Spacing between the OCV power and signal terminals is very narrow. Use suitable connections to prevent shorting of the test power supply. 3. When 12V power is provided to the OCV, the OCV must move forward as shown in the picture below. A: Maximum retarded valve timing condition (12V not provided) B: Maximum advanced valve timing condition (12V provided) NOTE: Reverse the connection polarity if the movement is opposite. 4. If the OCV does not move forward, examine if a foreign object like an aluminum chip (C) is jammed inside the OCV. • Blow out the foreign object using compressed air, reinstall the OCV and then verify that the fault is corrected. • If there is no damage to the OCV, then do not replace the OCV.
Oil Control Valve (OCV) for proper operation.
Diagnostic Trouble Codes (DTC):
P0016 = Crankshaft position-Camshaft position correlation (Bank1 Sensor A)
P0300 = Random / Multiple cylinder misfire detected
INSPECTION FLOW DIAGRAM:
OCV COIL RESISTANCE SPECIFICATION:
Delphi 6.7~7.7 Ohms
OCV INSPECTION PROCEDURE:
1. Measure the resistance between the OCV Power and Signal terminals.
1.3. Below specified range or zero: Short circuit - Replace the OCV.
below.
SOURCE: codes p0300 p0301 p0303 p0305 no driveability
P0300 - Random/Multiple Cylinder Misfire Detected
Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly.
A P0300 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. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.
Symptoms may include:
* the engine may be harder to start
* the engine may stumble / stumble, and/or hesitate
* other symptoms may also be present
Causes: A code P0300 may mean that one or more of the following has happened:
* Faulty spark plugs or wires
* Faulty coil (pack)
* Faulty oxygen sensor(s)
* Faulty fuel injector(s)
* Burned exhaust valve
* Faulty catalytic converter(s)
* Stuck/blocked EGR valve / passages
* Faulty camshaft position sensor
* Defective computer
Possible Solutions
If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.
Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 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.
Try this same solutionsa for each case, keep in mind that P0302 is missfire for #2 cyl, P0305 is misfire for #5 cyl and more.
Hope this helps (remember to rate this answer).
SOURCE: what does problem code P0303
Thanks for choosing FixYa and welcome. This is a misfire code. I would suggest changing the plugs, wires, and coil pack.
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