P1300

DTC P1300
Catalyst damaging misfire multiple cylinders Drive cycle C:Signal out of range - above maximum.

ALLDATA Editor Note: The Emission Relevant Misfire for multiple cylinders is found under code P0300. P0300

Possible causes by suggested order of priority:
^ Fuel pressure too low.
^ Crank synchronization problem
^ Ignition coil fault
^ Fuel contamination.
^ Engine mechanical fault.

Fuel Pressure Too Low.
CHECK THE FOLLOWING:
^ Fuelling adaptions show enrichment.
^ Check fuel pressure with fuel pressure gauge.
POSSIBLE FAULTS
^ Fuel filter blocked.
^ Fuel pressure regulator fault.
^ Fuel pump fault.

Crank Synchronization Problem
CHECK THE FOLLOWING:
^ Sporadic reference mark error count raised.
^ Reset count possibly also raised.
^ Crank sensor fault is set.
POSSIBLE FAULTS
^ Crank sensor wheel physically damaged.
^ Crank sensor out of position.
^ Crank sensor faulty.
DIAGNOSTIC HINTS
^ Raised reset count with a zero reference error count may indicate a 12v supply problem.
^ Diagnose fault with raised ref error count as a crank sensor fault.

Ignition Coil Fault
CHECK THE FOLLOWING:
^ Misfire counts high for all cylinders using coil 2 (1,4,6,7).
^ Misfire counts high for all cylinders using coil 1 (2,3,5,8).
^ Misfire counts high for all cylinders.
POSSIBLE FAULTS
^ Problem with 12v supply to coil pack 2 (cylinders 1,4,7,6).
^ Problem with 12v supply to coil pack 1 (cylinders 2,3,5,8).
^ Problem with 12v supply to both coil packs.
^ Coil pack 2 faulty.
DIAGNOSTIC HINTS
^ Raised misfire counts on paired cylinders 4+7, 2+3, 1+6, 5+8 indicate a problem with one coil drive or secondary circuit.
^ Raised misfire counts on groups of four cylinders 1+4+6+7 or 2+3+5+8 indicate coil pack problems.
^ Raised counts on groups of four cylinders 1+3+5+7 or 2+4+6+8 indicate a bank fuelling problem.

Fuel Contamination.
CHECK THE FOLLOWING:
^ Misfire counts equally high for all cylinders.
^ Fuel pressure measured with fuel pressure gauge reads normal.
^ Abnormal fuelling adaptions.
^ Engine running very rough.
^ Visual check of fuel in fuel line (take sample).
POSSIBLE FAULTS
^ Fuel contaminated.

Engine Mechanical Fault.
CHECK THE FOLLOWING:
^ Raised air flow at idle.Cylinder compressions.
^ Cylinder leakages.
^ Valve timing (Faulty or worn CAM).
^ Spark plug condition - check for oil or carbon fouling.
POSSIBLE FAULTS
^ Valve, Piston or CAM problems causing low engine efficiency.
^ Engine running rich causing carbon deposits on spark plugs.