P0133

Tests 155 - 159:

Tests 160 - 162:

SYMPTOM
P-0133 1/1 O2S SLOW RESPONSE

WHEN MONITORED
With engine temp greater than 147 degrees 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 ckt high resistance
- 1/1 O2 sensor ground ckt poor connection
- 1/1 O2 sensor signal ckt high resistance
- 1/1 O2 sensor signal ckt poor connection
- 1/1 O2 sensor slow response
- Exhaust leak
- 1/1 O2S slow response does not reoccur