P0532: A/C refrigerant pressure sensor: low input
The ECU sees a voltage that is too low from the air conditioning pressure sensor. Usually a wire shorting to earth, the plug or the sensor.
| Code | P0532 |
|---|---|
| System | Engine and transmission |
| Group | P05xx, Speed, idle and auxiliary inputs |
| Type | Generic: it means the same on every make |
| Can you keep driving? | Yes, no rush |
What P0532 means
The ECU is getting a voltage from the A/C pressure sensor that is lower than it should ever be. It is nearly always an electrical fault, although a system with no refrigerant can also give a very low reading. While the code is active, the compressor will not switch on.
Most common causes
- Sensor plug loose, wet or corroded
- Signal or supply wire broken or shorting to earth
- Faulty pressure sensor
- System empty or very low on refrigerant due to a leak
- Another sensor sharing the 5 volt supply and pulling it down
Symptoms
- Engine warning light on
- Air conditioning not cooling
- Compressor never engages
Can you drive with P0532?
Yes, no rush It does not affect the engine or safety. You can drive normally, just without air conditioning.
Open the bonnetthe in-depth explanation
How to check it
Check the live A/C pressure on your scan tool: if it reads zero or close to it with the engine off, first find out whether the system has any refrigerant. A garage can measure the real charge with gauges.
How to read and clear P0532 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P0532 with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P052E The positive sump ventilation regulator valve gives readings outside the normal
- P052F There is a fault in the glow plug control unit 1 system voltage
- P0530 A/C refrigerant pressure sensor: circuit fault
- P0531 The air conditioning refrigerant pressure sensor gives readings outside the
- P0533 A/C refrigerant pressure sensor: high input
- P0534 The air conditioning system has lost refrigerant charge
- P0535 The air conditioning evaporator temperature sensor has an electrical fault
- P0536 The air conditioning evaporator temperature sensor gives readings outside the
- P0500 Vehicle speed sensor malfunction
- P0501 Vehicle speed sensor range/performance
- P0502 Vehicle speed sensor circuit low input
- P0503 Vehicle speed sensor intermittent, erratic or high
To understand it properly
We explain how that system works, with drawings and no waffle, in our mechanics guide: Air conditioning.
What does code P0532 mean?
The ECU is getting a voltage from the A/C pressure sensor that is lower than it should ever be. It is nearly always an electrical fault, although a system with no refrigerant can also give a very low reading. While the code is active, the compressor will not switch on.
Can you drive with P0532?
It does not affect the engine or safety. You can drive normally, just without air conditioning.
How do you clear P0532?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P0532 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
