Toyota Camry: Common Codes & Fixes
Real-world diagnostic data for the Toyota Camry. These are the codes techs see most often. Tap any code for the full vehicle-specific fix and the exact part.
85 codes have specific fixes for the Toyota Camry
B0057 B0057 on Toyotas is almost always the passenger seat belt buckle switch. B0081 Toyota B0081 usually traces to a disconnected or loose yellow connector at the base of the B-pillar under the door sill scuff plate. B0083 B0083 (driver pretensioner) on Toyotas usually points to the yellow connector at the B-pillar base. B0100 Toyota airbag ECU codes are commonly triggered by a faulty spiral cable (clockspring) or a driver-side airbag connector that works loose. B2222 B2222 on Toyota AFS-equipped cars points to the headlight leveling actuator or the height control sensor on the rear suspension. B2799 Engine immobilizer system malfunction -- the transponder key is not being recognized. C1095 C1095 (hydraulic pump motor) on Toyotas indicates the ABS pump is not running or is drawing too much current. C1201 C1201 is a companion code -- it means the ABS/VSC system detected a fault in the engine control system. P0011 VVT oil control valve (OCV) is stuck in the advanced position. P0012 Intake camshaft timing is over-retarded. P0014 Exhaust cam VVT solenoid is stuck advanced. P0030 The upstream oxygen sensor heater circuit on bank 1 fails when the internal heater element burns out or the connector corrodes. P0031 Air/fuel ratio sensor (upstream O2) heater element fails — Toyota A/F sensors are heater-heavy and fail earlier than downstream sensors. P0036 The downstream O2 sensor heater on bank 1 (post-catalytic converter) fails from age and thermal cycling. P0050 Bank 2 sensor 1 is the upstream O2 sensor on the driver side of V6 Toyota engines. P0053 Upstream A/F sensor heater resistance out-of-range. P0056 Bank 2 sensor 2 is the downstream (post-cat) O2 sensor on the driver side. P0100 Toyota MAF/IAT combo sensor circuit fault — clean with MAF-safe cleaner first. P0101 Clean the MAF sensor with CRC MAF cleaner (05110). P0113 The IAT sensor on Toyota is integrated into the MAF sensor assembly. P0115 ECT sensor signal is erratic or out of range. P0116 ECT performance fault — most often a stuck-open thermostat preventing the engine from reaching proper operating temp. P0120 TPS circuit A malfunction. P0122 The TPS is part of the electronic throttle body assembly on the 2AR-FE. P0124 TPS intermittent — Toyota ETC throttle bodies are reliable but carbon buildup can cause erratic signal tracking. P0125 Insufficient coolant temperature for closed-loop fuel control. P0131 Bank 1 Sensor 1 (upstream) O2 sensor is reading low voltage (below 0.2V). P0132 Bank 1 Sensor 1 air-fuel ratio sensor reading high. P0133 Slow-responding upstream O2/A-F sensor. P0134 Bank 1 Sensor 1 has no activity -- the sensor is not switching between rich and lean. P0135 The upstream O2 sensor heater circuit has failed. P0136 Bank 1 Sensor 2 (downstream) O2 sensor circuit malfunction. P0137 Bank 1 Sensor 2 (downstream) O2 sensor is reading below 0.2V consistently. P0138 Downstream O2 sensor stuck high. P0139 Slow response post-cat on Toyota — often a sign of impending cat failure. P0140 Replace Bank 1 Sensor 2 (downstream, post-cat) O2 sensor. P0141 Bank 1 Sensor 2 (downstream) O2 sensor heater circuit malfunction. P0171 Check the brake booster vacuum hose -- it cracks where it connects to the intake manifold. P0172 A dirty MAF sensor underreporting airflow is the most common cause of P0172 on the 2AR-FE. P0201 Injector 1 circuit open or shorted. P0202 Injector 2 circuit open or shorted. P0204 Cylinder 4 injector circuit open or shorted. P0261 Toyota fuel injector circuit low codes are less common than on domestic vehicles. P0300 Replace all 4 ignition coils (Denso 673-1309). P0301 Single-cylinder misfire on cylinder 1 is typically a bad ignition coil (Denso 673-1309). P0302 Perform a coil swap test -- move the coil from cylinder 2 to cylinder 4. P0304 Cylinder 4 misfire is typically an ignition coil failure (Denso 673-1309). P0325 Knock sensor is located under the intake manifold on the 2AR-FE engine. P0327 Knock sensor below the intake manifold has low output. P0335 Crankshaft position sensor located behind the oil filter at the front of the engine near the crank pulley. P0401 Carbon buildup in the EGR passages between the EGR valve and intake manifold. P0420 Toyota cats last longer than most but fail around 150K miles. P0421 P0421 indicates the warm-up catalytic converter on Bank 1 is not reaching operating efficiency fast enough. P0431 P0431 is the Bank 2 equivalent of P0421 -- warm-up catalyst efficiency is below threshold on the rear bank. P0440 P0440 indicates a general EVAP system malfunction. P0441 The purge valve (VSV) sticks open or closed on Toyota engines. P0442 Gas cap is the #1 cause. P0444 Check the wiring harness between the ECM and the purge solenoid for chafed or broken wires. P0446 EVAP vent control valve (canister close valve) failure. P0447 The EVAP canister close valve (CCV) is mounted near the fuel tank. P0448 The EVAP canister close valve wiring can short to ground where it passes along the underbody. P0456 A small EVAP leak requires a smoke test to find. P0457 The fuel cap O-ring on Toyota vehicles dries out and cracks, especially in hot climates. P0500 The vehicle speed sensor is located on the transmission output shaft. P0502 The speed sensor signal wire develops high resistance at the ECM connector from pin corrosion. P0507 Clean the throttle body -- carbon buildup on the throttle plate prevents it from fully closing. P0730 The gear ratio error on Toyota U-series transmissions can be caused by a failing shift solenoid or worn internal components. P0732 Second gear ratio error on Toyota U-series transmissions is often caused by worn B2 brake band or a sticking shift solenoid. P0733 Third gear slipping on Toyota U-series transmissions is commonly caused by C3 clutch pack wear or a failing SL3 solenoid. P0735 5th gear ratio error on the U250E 6-speed typically indicates C1 clutch pack wear or a solenoid issue. P0740 The TCC solenoid circuit resistance is out of range due to a failing solenoid or wiring issue. P0741 The TCC does not fully engage due to worn TCC friction material in the torque converter. P0750 Shift solenoid S1 on the Toyota U250E transmission sticks from varnish buildup in old ATF. P0751 SL1 solenoid performance on Toyota U250E/U760E transmissions is often caused by wear in the valve body bore rather than the solenoid itself. P0756 SL2 solenoid performance in Toyota U-series transmissions controls the 2-3 and 3-4 shifts. P0766 Shift solenoid D performance on Toyota 6-speed automatics controls higher gear transitions. P0770 Shift solenoid SLT on the Toyota U250E is a linear solenoid that controls line pressure. P0771 Shift solenoid E performance on Toyota U-series transmissions affects the lockup and overdrive circuits. P2096 Toyota/Lexus P2096 commonly = exhaust leak at the flex pipe or front pipe joint. P2138 Replace accelerator pedal position sensor (integrated with pedal assembly). P2188 For Toyota and Honda, check the MAF sensor -- if it's under-reporting airflow, the ECU over-fuels at idle. P3280 Camry and Avalon set P3280 when EVAP purge or vent solenoid flow is incorrect. U0100 U0100 on Toyota is less common than on domestics and usually indicates a more serious fault. U0101 Toyota TCM communication loss is rare and usually indicates a CAN bus wiring fault rather than a TCM failure. U3125 U3125 lost comm with secondary ECU on Toyota typically points to the skid control ECU or the brake actuator.
Frequently Asked Questions
What are the most common check engine light codes on a Toyota Camry?
The most commonly reported OBD-II codes for the Toyota Camry include B0057, B0081, B0083, B0100, B2222. Each code indicates a specific issue -- tap any code above for the full diagnostic breakdown.
How much does it cost to fix a check engine light on a Toyota Camry?
Repair costs vary by code. Many Toyota Camry fixes like gas cap replacement, sensor cleaning, or spark plug changes are under $50 in parts and can be done at home. More complex repairs like catalytic converter or transmission work can run $500-$2,000+ at a shop.
Can I drive my Toyota Camry with the check engine light on?
It depends on the code. A steady check engine light usually means you can drive short distances safely. A flashing check engine light means stop driving immediately -- continued driving can cause serious engine damage. Scan the code first to know what you are dealing with.