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P0303 Diagnostic Trouble Code Discussion for August 2015

Cylinder 3 Misfire Detected


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Trouble Ticket Help Requests for DTC P0303
Help Request Posted
2006 Toyota Prius 1.5L Poor Idle Quality, Hesitation, MIL Lamp on VIN: JTDKB20UX6
P0303: Cylinder 3 Misfire Detected. ... check engine light on. Vehicle was in a few weeks ago, we could not get vehicle to run rough with hours of run time, only code stored was P0304. Recommended customer return when problem is more apparent. Customer returned 1.5 months later with mil on, cust...
August 11, 2015
2012 Ford F-250 Super Duty Lariat 6.2L Misfire VIN: 1FT7X2B66C
P0303: Cly 3 misfire. Vehicle came in barely running. Checked codes all misfire codes same bank. Unhooked exhaust pipe on right bank to check for plugged cat no change. Checked for melted plugs all okay. Would like to ask if variable valve timing could be causing such a problem. If...
August 20, 2015
2003 Mercedes-Benz C240 2.6L Excessive Emissions, Poor Idle Quality VIN: WDBRF61J03
P0303: Misfire cylinder 3. Vehicle was brought to me by a friend. Vehicle was misfiring on all cylinders and intermittent smoke out of the tail pipe. Found all spark plugs were original. Replaced the plugs vehicle starting running fine. After a test drive vehicle began missing again. Re...
August 26, 2015
2009 Mazda CX-7 Touring 2.3L Misfire VIN: JM3ER29L19
P0303: cyl 3 misfire. ... one. came in with mil on, p0300. road tested vehicle and it felt like a straight-forward ignition misfire. found tsb on spark plug replacement, which seemed like a good place to start.nothing looked out of the ordinary with plugs or coils. road tested to c...
August 30, 2015