Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnostic Mode 01: Obtain data
Diagnostic Mode 01 is used to display and monitor all emissions related measured values.
Depending on scan tool and protocol used, the information displayed in diagnostic mode 01 may be referred to by different names such as Test-ID (TID), Hex-ID, Component-ID (CID), On-Board Diagnostic Monitor Identifier (OBDMID), or contain no name at all and be referenced by only a number.
Test requirement
- Coolant temperature at least 80 ° C.
Procedure
- Connect the scan tool.
- Start the engine and run at idle.
- Select "Diagnostic Mode 1: Obtain data.".
- From the following table, select the desired the "PID" that is to be monitored, e.g. "PID 05-Coolant temperature".
The current values of the component or system that is being monitored will be displayed on the scan tool screen.
| PID | Component or System |
| 01: | Monitoring status since erasing DTC memory |
| 03: | Condition of fuel system |
| 04: | Calculated load condition value |
| 05: | Coolant temperature |
| 06: | Short term gasoline-air ratio bank 1 |
| 07: | Gasoline-air ratio bank 1 |
| 12: | Engine rotations per minute (RPM) |
| 13: | Vehicle speed |
| 14: | Valve timing adjustment at 1. cyl. to "advance" |
| 15: | Intake air temperature (IAT) |
| 16: | Air flow quantity at Mass Air Flow (MAF) sensor |
| 17: | Throttle valve position (absolute) |
| 18: | Availability status of secondary air |
| 19: | Component location of oxygen sensors |
| 21: | Bank 1 - sensor 2 |
| 28: | OBD request is designed for diagnostic of this vehicle |
- Switch the ignition off.
- End of diagnosis.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.