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 Method 1
Detect the malfunction depending on the average value of time necessary for λ to inverse the air fuel ratio from "Lean → Rich → Lean" to "Rich → Lean → Rich".
- Abnormality Judgment
Judge as NG when the following conditions are established.
| Malfunction Criteria | Threshold Value | DTC |
|---|---|---|
| Average value of time necessary for λ to inverse the air fuel ratio to Lean → Rich → Lean. | > 150 ms (AT model except for PZEV) > 130 ms (MT model except for PZEV) > 150 ms (PZEV AT model) > 170 ms (PZEV MT model) |
P015A |
| Average value of time necessary for λ to inverse the air fuel ratio to Rich → Lean → Rich. | > 350 ms (AT model except for PZEV) > 170 ms (MT model except for PZEV) > 200 ms (PZEV AT model) > 150 ms (PZEV MT model) |
P015B |
Time Needed for Diagnosis: 50 times of inversion
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgment
Judge as OK and clear the NG if the following conditions are established.
| Malfunction Criteria | Threshold Value | DTC |
|---|---|---|
| Average value of time necessary for λ to inverse the air fuel ratio to Lean → Rich → Lean. | ≤ 150 ms (AT model except for PZEV) ≤ 130 ms (MT model except for PZEV) ≤ 150 ms (PZEV AT model) ≤ 170 ms (PZEV MT model) |
P015A |
| Average value of time necessary for λ to inverse the air fuel ratio to Rich → Lean → Rich. | ≤ 350 ms (AT model except for PZEV) ≤ 170 ms (MT model except for PZEV) ≤ 200 ms (PZEV AT model) ≤ 150 ms (PZEV MT model) |
P015B |
Time Needed for Diagnosis: 50 times of inversion
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.