MIL ON - P0300 SET
Applicable Models
2004 - Mazda3 VIN Range: 000000 - ZZZZZZ;
2005 - Mazda3 VIN Range: 000000 - ZZZZZZ;
2006 - Mazda3 VIN Range: 000000 - ZZZZZZ;
2006 - B2500 VIN Range: 000000 - ZZZZZZ;
2006 - B3000 VIN Range: 000000 - ZZZZZZ;
2006 - B4000 VIN Range: 000000 - ZZZZZZ;
2005 - Tribute VIN Range: 000000 - ZZZZZZ;
2006 - Tribute VIN Range: 000000 - ZZZZZZ;
2003 - Mazda6 VIN Range: 000000 - ZZZZZZ;
2004 - Mazda6 VIN Range: 000000 - ZZZZZZ;
2005 - Mazda6 VIN Range: 000000 - ZZZZZZ;
2006 - Mazda6 VIN Range: 000000 - ZZZZZZ;
2004 - B2300 VIN Range: 000000 - ZZZZZZ;
2005 - B2300 VIN Range: 000000 - ZZZZZZ;
2006 - B2300 VIN Range: 000000 - ZZZZZZ;
Symptoms
620 DOES NOT TURN OFF/WARNING LIGHT
640 IMPROPER OPERATION
MTOL - 4688 Dealer Repair
Information
P0300 (Random misfire detected) may be stored in PCM memory and
illuminate MIL.
Before diagnosing, check all FOUR (4) spark plugs to ensure they are OEM
specification and not after market. The correct spark plugs are NGK
ITR5F13 (Tribute, Mazda3, N Mazda6). Spark plug AGSF 32F ECF4 (B2300).
Replace if necessary. If spark plugs are correct, continue with normal
diagnostics.
*** Published in Sept/Oct 2005 Mtips ***
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