P1598

Tests 1 - 2:

Tests 3 - 4:

Test 8:

SYMPTOM
P1598 - A/C PRESSURE SENSOR VOLTS TOO HIGH

WHEN MONITORED
With the ignition ON, the engine running, and the A/C relay energized.

SET CONDITION
The A/C pressure sensor signal at PCM cavity 42 goes above 4.9 volts.

POSSIBLE CAUSES
- Air conditioning pressure sensor ground circuit open
- Air conditioning pressure sensor defective
- A/C press sensor connector and wiring harness intermittent defect
- A/C pressure sensor connector and harness observable defect
- A/C pressure sensor signal circuit open
- A/C pressure sensor signal short to voltage
- PCM defective