LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2289 (Engine Controls - Powertrain DTC Charts & Descriptions (Except Diesel & Hybrid)) >> DTC Diagnosis >> DTC P0301 - P0309: Cylinder X Misfire Detected

DTC P0301 - P0309: Cylinder X Misfire Detected

WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2010 Mercury Mountaineer, 2010 Mercury Milan, 2010 Mercury Mariner, 2010 Mercury Grand Marquis, and 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
DTC P030X: CYLINDER X MISFIRE DETECTED

Description: 
NOTE: x represents cylinder numbers 1 through 9.
The misfire detection monitor is designed to monitor engine misfire and identify the specific cylinder in which the misfire has occurred. Misfire is defined as lack of combustion in a cylinder due to absence of spark, poor fuel metering, poor compression, or any other cause.
Possible Causes: 
  • Ignition system
  • Fuel injectors
  • Running out of fuel
  • Evaporative emission (EVAP) canister purge valve
  • Fuel pressure
  • Evaporative emission system
  • Exhaust gas recirculation (EGR) system
  • Base engine
Diagnostic Aids:  The malfunction indicator lamp (MIL) blinks once per second when a misfire severe enough to cause catalyst damage is detected. If the MIL is on steady state due to a misfire, this indicates the threshold for emissions was exceeded and caused the vehicle to fail an inspection and maintenance tailpipe test.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All - - GO to PINPOINT TEST HD .
scientia non olet · About LEMON Manuals