P0052

Tests 1 - 3:

Tests 4 - 6:

SYMPTOM
P0052-2/1 O2 SENSOR HEATER CIRCUIT HIGH

TEST NOTE
This symptom is diagnosed using the test P0031-1/1 O2 SENSOR HEATER CIRCUIT LOW.

WHEN MONITORED
Battery voltage above 10.6 volts, ECT below a certain TEMP but within a set Temperature difference of Battery TEMP sensor.

SET CONDITION
Desired state does not equal Actual state.

POSSIBLE CAUSES
- Heater control circuit open
- Intermittent condition
- Heater element check
- Fused O2 heater feed circuit open
- PCM