P0153

Tests 1 - 5:

Test 6:

SYMPTOM
P0153-O2 SENSOR 2/1 SLOW RESPONSE

TEST NOTE
This symptom is diagnosed using the test P0133-O2 SENSOR 1/1 SLOW RESPONSE.

WHEN MONITORED
Start and drive vehicle greater than 20 MPH and less than 55 MPH. Throttle open for a minimum 120 seconds. Coolant Temp greater than 70 °C (158 °F) Catalytic Converter Temperature greater than 600 °C

SET CONDITION
The O2 sensor voltage switches only 16 times for a 3.5L or 11 times for 2.7L or less from lean to rich within 20 second during monitoring. Two Trip Fault.

POSSIBLE CAUSES
- Intermittent condition
- Exhaust leak
- O2 sensor signal circuit
- O2 sensor return circuit
- O2 sensor