Code P1530: A/C Head Pressure Switch: Notes
A/C head pressure switch opens at 200-220 psi. When head pressure switch interrupts ground at PCM, left fan should run at high speed.
Code P1530 will set when the following conditions are present.
- Fan request circuit is grounded during first 6 seconds of engine run time.
- Engine coolant temperature is less than 88°F (31°C).
- Ambient air temperature is less than 82°F (28°C).
- RPM is less than 1800.
- Codes P0101, P0112, P0113, P0117 or P0118 are not set.
- All conditions must be met at same time.