1, 2 and 3 Digit Codes: 107

Trouble Code Number
- Scan tool 107, 108, 109, 110
- General scan tool P0301, P0302, P0303, P0304
- MIL 43

Fault Message
- Cylinder #1 Misfire
- Cylinder #2 Misfire
- Cylinder #3 Misfire
- Cylinder #4 Misfire

Background
- Excessive engine misfire results in increased catalyst temperature.
- Severe misfire could cause catalyst damage.
- To prevent catalytic converter damage, the PCM monitors engine misfire.
- The PCM monitors for misfire during most engine operating conditions.
- When a misfire is detected, the PCM stores a diagnostic trouble code and causes the MIL to either flash or illuminate continuously during active misfire.

Range of Check
- MAP voltage is less than 1.60 V
- Engine speed is between 2,200 and 2,800 r/min
- Engine coolant temperature is greater than 80°C (176°F)
- Vehicle speed less than 3mph (5 km/h)

Set Condition
1,000 Rev Misfire
- The PCM detects misfire in more than 1.6% of the engine cycles in a 1000 revolution period.

200 Rev Misfire
- The PCM detects misfire in more than 15% of the engine cycles in a 200 revolution period.

Probable Cause
- Spark plugs or wires failed
- Worn piston rings
- Worn valves
- Head gasket failed
- Cracked head
- Injector failed
- Wiring harness and connectors failed

Check the following items:
- Check the spark plug, spark plug cables.
- Check the injector.
- Check compression pressure.
- Check the cylinder head gasket and intake manifold gasket for damage.