It’s no coincidence that you’re searching for information on Toyota OBD/OBD2 codes right after your “Check Engine” light comes on – it’s a common concern for many Toyota owners. You’re likely wondering what that cryptic code on your dashboard means and how to fix the underlying issue. Fortunately, Toyota’s standardized OBD-II codes, along with its manufacturer-specific codes, can provide valuable insights into your vehicle’s problems.
But as you start to delve into these codes, you’ll realize that deciphering them is just the beginning – you’ll need to know how to troubleshoot and repair the issues they indicate, and that’s where things can get tricky.
Common OBD-II Trouble Codes
When your Toyota’s onboard computer detects a problem, it triggers a trouble code that helps you identify the issue.
These OBDII Trouble Codes are standardized, making it easier to diagnose and repair your vehicle.
One common code is P0335, indicating a problem with the Crankshaft Position Sensor.
This sensor monitors the engine’s crankshaft speed and position, providing critical data to the engine control module.
A faulty sensor can cause misfires, decreased fuel efficiency, and even engine failure.
When you see this engine trouble code, you’ll know to inspect and potentially replace the Crankshaft Position Sensor.
Understanding these codes helps you take control of your Toyota’s maintenance and repairs.
Toyota-Specific Diagnostic Codes
Because your Toyota is equipped with advanced onboard diagnostics, it can generate its own set of unique trouble codes in addition to the standardized OBD-II codes.
These Toyota-specific diagnostic trouble codes range from P0100 to P1999 for powertrain issues and P2000 to P2999 for body and chassis issues.
For example, the P0100 code indicates a mass airflow circuit malfunction, which can be caused by a faulty MAF sensor or air intake system leaks.
The P0120 code, on the other hand, indicates a throttle pedal position sensor circuit malfunction, which can be caused by a faulty throttle position sensor or poor electrical connection.
These codes help you identify specific problems in your Toyota’s systems, such as the Valve Position Sensor Circuit, allowing you to take targeted action to repair the issue.
Troubleshooting and Repair Resources
Your Toyota’s onboard diagnostics system provides a wealth of information to help you identify and troubleshoot problems.
When you’ve retrieved a trouble code, you’ll need to consult resources to determine the root cause and necessary repairs.
- You can access online databases that list and explain OBDII codes, including Toyota-specific codes, organized by category and system for quick lookup.
- Year and model-specific repair manuals provide detailed diagnostic and repair information, covering systems like throttle control and pedal position sensor.
- Online forums and tutorials can offer additional guidance for DIY repairs, and professional assistance may be necessary for complex issues.
Most Common Toyota OBD-II Trouble Codes
| OBD Code | Description |
|---|---|
| P1100 | BARO Sensor Circuit |
| P1120 | Accelerator Pedal Position Sensor Circuit |
| P1121 | Accelerator Pedal Position Sensor Range/Performance Problem |
| P1125 | Throttle Control Motor Circuit |
| P1126 | Magnetic Clutch Circuit |
| P1127 | ETCS Actuator Power Source Circuit |
| P1128 | Throttle Control Motor Lock |
| P1129 | Electric Throttle Control System |
| P1130 | Air/Fuel Sensor Circuit Range/Performance (Bank 1 Sensor 1) |
| P1133 | Air/Fuel Sensor Circuit Response (Bank 1 Sensor 1) |
| P1135 | Air/Fuel Sensor Heater Circuit Response (Bank 1 Sensor 1) |
| P1150 | Air/Fuel Sensor Circuit Range/Performance (Bank 1 Sensor 2) |
| P1153 | Air/Fuel Sensor Circuit Response (Bank 1 Sensor 2) |
| P1155 | Air/Fuel Sensor Heater Circuit (Bank 1 Sensor 2) |
| P1200 | Fuel Pump Relay Circuit |
| P1300 | Igniter Circuit Malfunction – No. 1 |
| P1310 | 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 |
| P1411 | EGR Valve Position Sensor Circuit Range/Performance |
| 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 |
| P1633 | ECM |
| P1652 | Idle Air Control Valve Control Circuit |
| P1656 | OCV Circuit |
| P1658 | Wastegate Valve Control Circuit |
| P1661 | EGR Circuit |
| P1662 | EGR by-pass Valve Control Circuit |
| P1780 | Park/Neutral Position Switch Malfunction (Only For A/T) |
