| Main Action |
- Check Lambda signal response
|
- Leakage in intake or exhaust system.
- Poor connection or damaged harness
- HO2S contamination
|
| Prerequisite condition |
- Upstream O2 sensor operative readiness is detected (Sensor tip temperature is higher than 640°C (1, 184°F)).
- Battery voltage is between 10V and 16V.
- P042000 (Catalyst Diagnosis) monitoring is active.
|
| Threshold Value |
- Integral (Lambda signal amplitude measured/Lambda signal amplitude of a slow sensor) is greater than 1.0.
|
| Diagnostic Time |
- 25 Lambda controller cycles
|
| Mil On Condition |
|