P0133

Tests 1 - 2:

Tests 3 - 7:

Test 8:

SYMPTOM
P0133 - 1/1 O2 SENSOR SLOW RESPONSE

WHEN MONITORED
With engine coolant temperature greater than 147 °F, after reaching a vehicle speed of 10 mph, and throttle remaining open (OFF idle) for two minutes, bring vehicle to a stop and allow the engine to idle with transmission in DRIVE (auto) or in NEUTRAL (manual).

SET CONDITION
The oxygen sensor signal voltage is switching from below 0.27 volts to above 0.62 volts and back fewer times than required.

POSSIBLE CAUSES
- Engine Mechanical Problem
- 1/1 O2 sensor ground circuit high resistance
- 1/1 O2 sensor ground circuit poor connection
- 1/1 O2 sensor signal circuit high resistance
- 1/1 O2 sensor signal circuit poor connection
- 1/1 O2 sensor slow response
- 1/1 O2 sensor slow response does not reoccur
- Exhaust leak