CX 7 P0302 issue
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From: Florida
CX 7 P0302 issue
When the engine is warning up I keep getting a
P0302 code. I have replaced all of the coil packs , spark Plugs , added injector cleaner to the gas tank and replaced the gas cap. After the engine is warm, it runs fine. 2007 cx 7 sport model.. any suggestions ?
P0302 code. I have replaced all of the coil packs , spark Plugs , added injector cleaner to the gas tank and replaced the gas cap. After the engine is warm, it runs fine. 2007 cx 7 sport model.. any suggestions ?
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Joined: May 2012
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From: Queensland Australia
DTC P0302
Cylinder No.2 misfire detected
DETECTION CONDITION
• The PCM monitors the CKP sensor input signal interval time. The PCM calculates the change of interval time for each cylinder. If the change of interval time exceeds the preprogrammed criteria, the PCM detects a misfire in the corresponding cylinder. While the engine is running, the PCM counts the number of misfires that occurred at 200 crankshaft revolutions and 1,000 crankshaft revolutions and calculates a misfire ratio for each crankshaft revolution. If the ratio exceeds the preprogrammed criteria, the PCM determines that a misfire, which can damage the catalytic converter or affect emission performance, has occurred.
Diagnostic support note
• This is a continuous monitor (Misfire).
• The MIL illuminates if the PCM detects a misfire which affects emission performance in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• The MIL flashes if the PCM detects a misfire which can damage the catalytic converter during the first drive cycle.
• PENDING CODE is available if the PCM detects a misfire which affects emission performance during first drive cycle.
• FREEZE FRAME DATA is available.
• DTCs are stored in the PCM memory.
POSSIBLE CAUSE
• Erratic signal to PCM
― APP sensor signal
― ECT sensor signal
― IAT sensor signal
― MAF sensor signal
― CKP sensor signal
― TP sensor signal
― VSS signal
― Related connector and terminal malfunction
― Related wiring harness malfunction
• Spark plug malfunction
• Air suction in intake air system (between dynamic chamber and cylinder head)
• Engine malfunction (Engine coolant leakage)
• Fuel injector related wiring harness malfunction
• Ignition coil malfunction
• Ignition system malfunction
• Inadequate engine compression due to engine internal malfunction
• Fuel injector malfunction
• PCM malfunction
Cylinder No.2 misfire detected
DETECTION CONDITION
• The PCM monitors the CKP sensor input signal interval time. The PCM calculates the change of interval time for each cylinder. If the change of interval time exceeds the preprogrammed criteria, the PCM detects a misfire in the corresponding cylinder. While the engine is running, the PCM counts the number of misfires that occurred at 200 crankshaft revolutions and 1,000 crankshaft revolutions and calculates a misfire ratio for each crankshaft revolution. If the ratio exceeds the preprogrammed criteria, the PCM determines that a misfire, which can damage the catalytic converter or affect emission performance, has occurred.
Diagnostic support note
• This is a continuous monitor (Misfire).
• The MIL illuminates if the PCM detects a misfire which affects emission performance in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• The MIL flashes if the PCM detects a misfire which can damage the catalytic converter during the first drive cycle.
• PENDING CODE is available if the PCM detects a misfire which affects emission performance during first drive cycle.
• FREEZE FRAME DATA is available.
• DTCs are stored in the PCM memory.
POSSIBLE CAUSE
• Erratic signal to PCM
― APP sensor signal
― ECT sensor signal
― IAT sensor signal
― MAF sensor signal
― CKP sensor signal
― TP sensor signal
― VSS signal
― Related connector and terminal malfunction
― Related wiring harness malfunction
• Spark plug malfunction
• Air suction in intake air system (between dynamic chamber and cylinder head)
• Engine malfunction (Engine coolant leakage)
• Fuel injector related wiring harness malfunction
• Ignition coil malfunction
• Ignition system malfunction
• Inadequate engine compression due to engine internal malfunction
• Fuel injector malfunction
• PCM malfunction
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Hadrien
Mazda Millenia
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Jan 17, 2006 06:28 PM