- Code 12: Battery disconnected within the last 50 key-on cycles.
- Code 13: Oxygen sensor (lean exhaust).
- Code 14: Oxygen sensor (rich exhaust).
- Code 15: Coolant temperature sensor (open or shorted).
- Code 16: Vehicle speed sensor (no signal).
- Code 17: Oxygen sensor heater circuit (open or shorted).
- Code 18: Engine coolant temperature sensor (out of range).
- Code 19: Throttle position sensor (open or shorted).
- Code 21: Ignition module (no signal).
- Code 22: Crankshaft position sensor (no signal).
- Code 23: Knock sensor (out of range).
- Code 24: EGR system (insufficient flow).
- Code 25: Air conditioning refrigerant pressure switch (open or shorted).
- Code 26: Transmission fluid temperature sensor (out of range).
- Code 27: Brake fluid level sensor (low fluid level).
- Code 28: Fuel level sensor (out of range).
- Code 29: Parking brake switch (open or shorted).
- Code 30: Cruise control switch (open or shorted).
- Code 31: Horn switch (open or shorted).
- Code 32: Headlight switch (open or shorted).
- Code 33: Tail light switch (open or shorted).
- Code 34: Stop light switch (open or shorted).
- Code 35: Turn signal switch (open or shorted).
- Code 36: Hazard light switch (open or shorted).
- Code 37: High beam indicator light (open or shorted).
- Code 38: Low beam indicator light (open or shorted).
- Code 39: Neutral safety switch (open or shorted).
- Code 40: Reverse light switch (open or shorted).
- Code 41: Transmission range switch (out of range).
- Code 42: Transfer case switch (open or shorted).
- Code 43: Four-wheel drive indicator light (open or shorted).
- Code 44: Air bag indicator light (open or shorted).
- Code 45: Seat belt switch (open or shorted).
- Code 46: Air conditioner compressor relay (open or shorted).
- Code 47: Radiator fan relay (open or shorted).
- Code 48: Fuel pump relay (open or shorted).
- Code 49: Starter relay (open or shorted).
- Code 50: Power window relay (open or shorted).
- Code 51: Power door lock relay (open or shorted).
- Code 52: Keyless entry remote (not programmed).
- Code 53: Anti-theft system (disabled).
- Code 54: Theft deterrent system (armed).
- Code 55: Passive anti-theft system (not programmed).
- Code 56: Passlock system (not programmed).
- Code 57: Vehicle Immobilizer system (not programmed).
These codes can be read using a code reader or scanner. If you do not have a code reader, you can take your vehicle to a qualified mechanic who can read the codes for you.
