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Powertrain Codes (P-Codes): Full List

Powertrain codes start with P and cover the engine, fuel and ignition systems, emission controls and the transmission. They are the codes that most often turn on the check engine light and the ones most relevant to a smog check or emissions test. The third character narrows it down: 1–2 fuel and air metering, 3 ignition and misfire, 4 emission controls, 5 speed and idle, 6 computer and outputs, 7–9 transmission, A hybrid.

539Codes
2.7Average severity
12%High or critical
20%DIY-friendly
Severity distributionSeverity distribution

Most viewed

P0302 Powertrain Cylinder 2 keeps misfiring. On inline engines it's a middle cylinder, so rule out coolant… Moderate P0174 Powertrain The cylinder bank without cylinder 1 is running lean even with the maximum fuel correction… Moderate P0011 Powertrain The bank 1 intake cam sits further advanced than the PCM asked for, usually an oil or control… Moderate P0218 Powertrain The transmission fluid got hotter than the computer allows, from heavy load, low fluid… High P0301 Powertrain Cylinder 1 is repeatedly failing to fire. The cause is almost always its coil, plug, injector… Moderate P0014 Powertrain The bank 1 exhaust cam won't follow its target and stays too far advanced; think oil, valve… Moderate

All codes (62)

All Severity 3+ Severity 4+
P3000 Toyota · Powertrain Toyota's hybrid computer flags a fault in the high-voltage battery system and limits hybrid… High P3191 Toyota · Powertrain The hybrid system spun the gas engine with its motor-generator, but the engine never fired up. High

Subsystems

Fuel & Air Metering 193Emission Controls 97Ignition & Misfire 66Speed & Idle Control 57Transmission 57ECU & Outputs 54Hybrid / EV 14

Systems

Network 42Chassis 37Body 30