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 02: Obtain operating conditions
Diagnostic Mode 02 is used to monitor the operating conditions under which the Engine Control Module (ECM) has detected and stored an emissions related DTC.
- Depending on diagnostic tester and protocol used, the information in diagnostic mode 02 may be referred to by different names such as Test-ID (TID), Hex-ID, Component-ID (CID), or On-Board Diagnostic Monitor Identifier (OBDMID).
Procedure
- Connect the diagnostic tester.
- Start the engine and run at idle.
- If the engine does not start, crank the engine using starter for at least 5 seconds, do not switch the ignition off afterward under any circumstances.
- Select "Diagnostic Mode 2: Obtain operating conditions.".
- From the following table, select the desired the "PID" , e.g. "PID 05-Coolant temperature" that is to be monitored.
- More than one "PID" may be selected and monitored.
The current values of the component or system that is being monitored will be displayed on the diagnostic tester screen.
| PID | Component or System |
|---|---|
| 02: | DTC which triggered the current reception of all control module information |
| 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: | Ignition timing adjustment at 1. cyl. in direction |
| 15: | Intake air temperature (IAT) |
| 16: | Air stream amount at Mass Air Flow (MAF) sensor |
| 17: | Throttle valve position (absolute) |
| 31: | Time after engine on |
| 35: | Fuel Rail Pressure |
| 46: | Commanded Evaporative Purge |
| 51: | Barometric Pressure |
| 66: | Control module voltage |
| 67: | Absolute Load Value |
| 68: | Commanded Equivalence Ratio |
| 69: | Relative Throttle Position |
| 70: | Ambient air temperature |
| 71: | Absolute Throttle Position B |
| 73: | Accelerator Pedal Position D |
| 74: | Accelerator Pedal Position E |
| 76: | Commanded Throttle Actuator Control |
- 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.