P0133

Tests 1 - 4:

Tests 5 - 6:

SYMPTOM
P0133-1/1 O2 SENSOR SLOW RESPONSE

WHEN MONITORED
With ECT greater than 147 °F, after reaching a vehicle speed of 10 mph, and the throttle remaining open (off idle) for 2 minutes, bring the vehicle to a stop and allow the engine to idle with the transmission in DRIVE.

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

POSSIBLE CAUSES
- Intermittent condition
- Exhaust leak
- O2 sensor signal circuit voltage drop
- O2 sensor ground circuit voltage drop
- O2 sensor