Toyota OBD Codes: Meaning & Fixes

P0171 Powertrain The engine computer is adding the maximum extra fuel it's allowed on bank 1 and still sees… Moderate P0325 Powertrain The computer isn't getting a usable signal from knock sensor 1, so it pulls timing to protect… Low P0A80 Powertrain The hybrid system sees weak or unbalanced modules in the high-voltage battery and flags… Moderate P1349 Toyota · Powertrain Toyota's VVT-i system isn't moving the intake camshaft to the position the ECM is asking for. Moderate P0401 Powertrain The ECU opened the EGR system but saw too little effect — the valve or its passages are likely… Low

B0111 Toyota · Body The airbag computer sees a break in the firing circuit of the right front seat's side airbag. High B1650 Toyota · Body The airbag computer got an error from the passenger seat weight sensors and can't classify… Moderate B1801 Toyota · Body The airbag computer measured a break in the driver airbag's firing loop through the steering… High C1201 Toyota · Chassis The engine computer reported a fault, so the ABS/VSC unit switched stability and traction… Low C1223 Toyota · Chassis The stability control side of the system has been told that ABS has a fault, so VSC and TRAC… Moderate C1241 Toyota · Chassis The ABS/stability control computer saw its supply voltage drop too low, so it shut the systems… Low C1252 Toyota · Chassis The brake pressure pump ran far longer than normal without reaching or holding its target… High C1253 Toyota · Chassis The brake ECU sees a pump motor relay or its monitor line not doing what it was told to do. Moderate C1256 Toyota · Chassis The brake system's high-pressure accumulator is below its minimum, so power brake assist can't… Critical C1300 Toyota · Chassis The ABS/VSC computer failed its own internal self-test and has shut down ABS and stability… Moderate C1391 Toyota · Chassis The hybrid brake system is losing stored hydraulic pressure internally, so the pump keeps… High P0000 Powertrain P0000 is not a fault: the scanner found no stored code. It is a placeholder that means… Minor P0011 Powertrain The bank 1 intake cam sits further advanced than the PCM asked for, usually an oil or control… Moderate P0031 Powertrain The upstream sensor heater on bank 1 draws little or no current – usually an open heater… Low P0100 Powertrain The PCM sees an electrical fault in the MAF sensor circuit: signal missing, erratic or not… Low P0130 Powertrain The upstream oxygen sensor on bank 1 sent a signal the engine computer could not make sense of. Low P0138 Powertrain The oxygen sensor behind the converter on bank 1 reads too high, often from an internal short… Low P0155 Powertrain The heater in bank 2's front O2 sensor, or its fuse, power feed or ECU-controlled ground, has… Low P0171 Powertrain The engine computer is adding the maximum extra fuel it's allowed on bank 1 and still sees… Moderate P0305 Powertrain Cylinder 5 is misfiring. First job: work out which bank it sits on, because that decides what… Moderate P0325 Powertrain The computer isn't getting a usable signal from knock sensor 1, so it pulls timing to protect… Low P0332 Powertrain Knock sensor 2 reads too low. On a V engine it's the bank without cylinder 1; on some fours… Low P0401 Powertrain The ECU opened the EGR system but saw too little effect — the valve or its passages are likely… Low P0410 Powertrain The cold-start air pump system that helps heat the catalytic converter didn't pass its… Low P0418 Powertrain The ECU sees a fault in the relay circuit that switches the secondary air pump on and off. Low P0440 Powertrain Catch-all EVAP code: the system failed its self-check. Start with the gas cap, then check hoses… Minor P0441 Powertrain The ECU opened the purge valve but saw the wrong flow: too little, too much, or at the wrong… Low P0451 Powertrain The tank pressure reading is electrically fine but doesn't make sense: offset, stuck, noisy… Minor P0607 Powertrain A general internal performance check in the engine computer failed – supply, grounds… Moderate P0A0F Powertrain The hybrid system spun the gas engine with its motor-generator to start it, but the engine… High