OBD II Fault Code P0304 :

Description of Fault code P0304

MISFIRE No.4 CYLINDER

Possible failuer P0304

• Fuel injector clogged, leaking
• Fuel injector harness open or short
• Compression low
• Valve clearance incorrect

Diagnostic Procedure using AutoHex II Scan Tool

• The state that there is a major change in crankshaft revolution speed is detected.

Test Conditions using AutoHex tester

• Engine running.

Clear Fault codes Conditions

• The state that there is a major change in crankshaft revolution speed is detected.

MIL Status

• Check Engine Light ON

Note:

• AutoHex II is a professional Auto diagnostic.
• This fault code is a GERENRIC fault code, some cars may change the meaning of this fault code.
  To get the accurate fault code description you may use AutoHex II

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