Toyota Check Engine Light Codes
Welcome to the Toyota Check Engine Light codes page. Below you will find the most complete list of Toyota trouble codes available. The code definitions are a good starting point when determining the cause of the service engine light but where do you go from there? We have a large number of resources to help you repair the problem. Here is how we suggest you proceed. Look up your code definition. This tells you where to start testing. If you are unsure of any abbreviations, check out the acronym list by clicking on the link at the left.
Next, read our article Automotive Circuit Testing 101, and if there is an article related to the system you are testing, such as Oxygen Sensors or EGR concerns, read these as well. They will provide valuable info! If there is a link to a specific diagnosis strategy for the code then follow that and start testing. If there is no procedure for your manufacturer specific code, then I suggest referring to a similar generic OBD II code (these are listed numerically by system type) to get a good idea of what to look for. If at this point you still need assistance use the "Get Help" link and let us know how we can help. We can provide information on component location, specifications, circuit color/location and more. We do ask that you please read the info available on the site first so that we can help reduce repeat questions. So please read our Disclaimer and when you're ready jump in!Be sure to scroll all the way to the bottom of the page as there is some great info there!
We do our best to update these Toyota check engine light codes as frequently as possible. If you find one missing let us know and we we'll add it immediately! Please use the form on our Contact Page to get in touch with us. We certainly understand how frustrating it can be to look for a code definition and have it not online when you need it. And lets face it, if the service engine light is on then you need it now! It's easiest to use the "Find On This Page" feature of your browser's "Edit" menu to find codes on this page as the list is quite long. These are listed in numerical order for easy searching.
When retrieving Toyota check engine light codes with an OBD II scan tool, proceed as follows:
1. Connect scan tool to the 16-pin data link connector (DLC) located underneath the steering column. The connector may have a removable cover.
2. Turn the ignition on.
3. Follow scan tool manufacturer's operating instructions to access the Diagnostic Trouble Codes (DTC's).
Remember, these are manufacturer specific codes only. Refer to our Generic OBD II code list for definitions on all other Toyota diagnostic trouble codes.
Manufacturer Specific Codes
P1100 BARO Sensor Circuit - Read Our Article on Automotive Circuit Testing For Help With This Toyota Check Engine Light Code
P1120 Accelerator Pedal Position Sensor Circuit - Read Our Article on Automotive Circuit Testing For Help With This Toyota Check Engine Light Code
P1121 Accelerator Pedal Position Sensor Range/Performance Problem
P1125 Throttle Control Motor Circuit - Read Our Article on Automotive Circuit Testing For Help With This Toyota Check Engine Light Code
P1126 Magnetic Clutch Circuit
P1127 ETCS Actuator Power Source Circuit
P1128 Throttle Control Motor Lock
P1129 Electric Throttle Control System
P1133 Air/Fuel Sensor Circuit Response (Bank 1 Sensor 1) - Read Our Article On Oxygen Sensor Codes For Help With This Toyota Check Engine Light Code
P1150 Air/Fuel Sensor Circuit Range/Performance (Bank 1 Sensor 2)
P1153 Air/Fuel Sensor Circuit Response (Bank 1 Sensor 2) - Read Our Article On Oxygen Sensor Codes For Help With This Toyota Check Engine Light Code
P1155 Air/Fuel Sensor Heater Circuit. (Bank 1 Sensor 2)
P1200 Fuel Pump Relay Circuit
P1300 Igniter Circuit Malfunction - No. 1
P1305 Igniter Circuit Malfunction - No. 2
P1335 No Crankshaft Position Sensor Signal - Engine Running
P1349 VVT System
P1400 Sub-Throttle Position Sensor
P1401 Sub-Throttle Position Sensor Range/Performance Problem
P1405 Turbo Pressure Sensor Circuit
P1406 Turbo Pressure Sensor Range/Performance Problem
P1410 EGR Valve Position Sensor Circuit Malfunction - Read Our Article on EGR Valve Codes For Help With This Toyota Check Engine Light Code
P1411 EGR Valve Position Sensor Circuit Range/Performance - Read Our Article on EGR Valve Codes For Help With This Toyota Check Engine Light Code
P1500 Starter Signal Circuit
P1510 Boost Pressure Control Circuit
P1511 Boost Pressure Low
P1512 Boost Pressure High
P1520 Stop Lamp Switch Signal Malfunction
P1565 Cruise Control Main Switch Circuit
P1600 ECM BATT Malfunction
P1605 Knock Control CPU
P1630 Traction Control System
P1652 Idle Air Control Valve Control Circuit
P1656 OCV Circuit
P1658 Wastegate Valve Control Circuit
P1661 EGR Circuit
P1662 EGR Bypass Valve Control Circuit
P1700 Vehicle Speed Sensor '2' Circuit Fault
P1705 Direct Clutch Speed Circuit Fault
P1765 Linear Shift Solenoid Circuit Fault
P1780 Park/Neutral Position Switch Malfunction (Only For A/T)