P0153

Test 1 - 3:

Test 4 - 5:

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
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
- Good trip equal to zero
- Exhaust leak
- Resistance in the O2 sensor signal circuit
- Resistance in the (K4) sensor ground circuit
- O2 sensor