1, 2 and 3 Digit Codes: 106

Scan Tool 106 (MIL 43):

Trouble Code Number
- Scan tool 106
- General scan tool P0300
- MIL 43

Fault Message
- Multiple Cylinder 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 1,000 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
- Ignition coil failed
- Crankshaft position sensor failed
- Worn piston rings
- Worn valves
- Head gasket failed
- Cracked head
- Fuel lines and filter failed
- Fuel pressure regulator failed
- Injectors failed
- Wiring harness and connectors failed