P0532

A/C Refrigerant Pressure Sensor A Circuit Low

Car Fault Codes Speed & idle

Can you still drive? Yes, normally

Who can fix it? Needs a workshop

Typical repair time 30 minutes – 1.5 hours

Typical cost SAR 100 to 600

What it means

The engine computer has detected that the A/C refrigerant pressure sensor signal voltage is below normal, meaning a very low pressure reading. The cause may be electrical, or a severe refrigerant shortage from a leak.

Symptoms3

A/C does not cool and the compressor does not engage.
Check engine light on.
Cooling fans may not run with the A/C.

Possible causes5

Severe refrigerant loss from a leak.
Signal wire shorted to ground.
Open reference voltage wire to the sensor.
Internal sensor failure.
Corroded or loose connector.

How to diagnose5

Connect a manifold gauge set; if pressure is really low, look for the leak.
If pressure is normal, compare the sensor reading on a scan tool with the gauges.
Measure reference voltage at the connector and compare with the manufacturer specification.
Check the signal wire for a short to ground.
Check for low reference voltage codes such as P0642.

How to fix5

Repair the refrigerant leak and recharge the system to the correct amount.
Clean or replace the connector.
Repair the shorted or open wire.
Replace the A/C pressure sensor.
Clear the codes and confirm the compressor runs and the pressure reading is plausible.

Repair cost

0–500

500–2,000

2,000–5,000

5,000+

In Saudi riyals; the highlighted part is the expected range for this fault.

The cost is low for a wiring fault, and rises when a leak repair and recharge or a new sensor is needed.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026

Frequently asked questions

Does this code mean the refrigerant is low?

It may, because the sensor reads real pressure. Measuring pressure with A/C gauges shows whether the shortage is real or the fault is electrical.

Is a recharge enough?

If refrigerant is low, the leak must be repaired first, or the loss and the code will return.

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This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.

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