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.
Work procedure
- Connect diagnostic tester; see DIAGNOSTIC TESTER, CONNECTING .
- Start engine and let run at idle.
- Under address word 33, select "Diagnostic mode 1: Check measured values."
- select desired measuring value "PID 01".
- Observe the right 8 -digit number block:
If all diagnoses have run through successfully, the 8-digit number block
Specified value: 00000000must be displayed.
Evaluation PID 01: System status-information (right 8-digit number block:)
| Meaning if display position = 0 | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | Diagnostic function |
| 0 | Exhaust gas recirculation OK | |||||||
| 0 | Oxygen sensor heater OK
|
|||||||
| 0 | Oxygen sensors OK
|
|||||||
| 0 | A/C system OK
|
|||||||
| 0 | Secondary Air Injection (AIR) system OK
|
|||||||
| 0 | EVAP canister system (tank ventilation system) OK
|
|||||||
| 0 | Catalytic converter heater OK
|
|||||||
| 0 | Catalytic converter OK
|
|||||||
If a 1 is displayed instead of a 0 in the 8-digit number block:
- Generate readiness code; see READINESS CODE, GENERATING .
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.