The American classic from the F-150. Known for spark plug and COP coil trouble plus cam phasers - misfires are daily bread for its mechanics.
Click a code for the full breakdown: symptoms, causes, and whether you can keep driving.
Random/Multiple Cylinder Misfire Detected
The engine control unit detects misfires occurring randomly across multiple cylinders, meaning combustion is failing intermittently in more than one cylinder.
Cylinder 1 Misfire Detected
Combustion is repeatedly failing in cylinder 1. The ECU counts crankshaft speed fluctuations and attributes them to that specific cylinder.
System Too Lean (Bank 1)
The engine is getting too much air or too little fuel on bank 1 - the ECU has hit the limit of its ability to compensate.
Catalyst System Efficiency Below Threshold (Bank 1)
The downstream oxygen sensor shows the catalytic converter on bank 1 is no longer cleaning exhaust gases efficiently.
EVAP System Leak Detected (Small Leak)
The evaporative emissions system, which stores fuel vapors, has a small leak detected during self-test.
EVAP System Leak Detected (Large Leak)
The fuel vapor recovery system has a significant leak - most often the fuel cap is loose or missing.
Find a trusted repair shop nearby and book a diagnostic visit online.
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