P0533 A/C Pressure sensor circuit high

P0533 Code conditions:
- A/C clutch relay energized.
- The A/C pressure transducer signal the PCM received from the TIPM is above the maximum acceptable value.
- MIL light illuminate

P0533


Possible causes P0533 Code

  • A/C pressure sensor supply circuit shorted to voltage.
  • A/C pressure sensor signal circuit shorted to voltage.
  • A/C pressure sensor signal circuit shorted to the A/C pressure sensor supply circuit.
  • A/C pressure sensor signal circuit open/high resistance.
  • A/C pressure sensor ground circuit open/high resistance.
  • A/C pressure transducer.
  • Totally Integrated Powere Module.

Diagnose code P0533 Code


Step 1. Check for an active DTC
Diagnose and repair any CAN bus, communication or implausible signal DTCs before proceeding with this test. Diagnose and repair any system voltage or sensor supply voltage DTCs before continuing with this test. Make sure the A/C refrigerant system is properly charged in accordance specification.
Test drive or operate the vehicle in accordance with the when monitored and set conditions. With the scan tool, read DTCs.

Is the DTC active or pending?

Yes, go to step 2.
No, perform the PCM intermittent condition.

Step 2. Check the A/C pressure sensor supply circuit for a short to voltage
Turn the ignition off, disconnect the A/C pressure sensor connector. Disconnect the TIPM C1 harnesss connector. Turn the ignition on, measure the voltage on the A/C pressure sensor supply circuit at the A/C pressure sensor harness connector.

Is the voltage above 5.2 volts?

Yes, repair the A/C pressure sensor supply circuit for a short to voltage.
No, go to step 3.

Step 3. Check the A/C pressure sensor signal circuit for a short to voltage
Measure the voltage on the A/C pressure sensor signal circuit at the A/C pressure sensor harness connector.

Is the voltage above 5.2 volts?

Yes, repair the A/C pressure sensor signal circuit for a short to voltage.
No, go to step 4.

Step 4. A/C pressure sensor signal circuit shorted to the A/C pressure sensor supply circuit
Check for continuity between the A/C pressure sensor signal circuit and the A/C pressure sensor supply circuit at the A/C pressure sensor harness connector.

Is there continuity between the A/C pressure sensor signal circuit and the A/C pressure sensor supply circuit?

Yes, repair the A/C pressure sensor signal circuit for a short to the A/C pressure sensor supply circuit.
No, go to step 5.

Step 5. Check the A/C pressure sensor signal circuit for an open/high resistance
Turn the ignition off, measure the resistance of the A/C pressure sensor signal circuit between the A/C pressure sensor harness connector and the TIPM harness connector.

Is the resistancebelow 3.0 Ohms?

Yes, go to step 6.
No, repair the A/C pressure sensor signal circuit for an open or high reistance.

Step 6. Check the A/C pressure sensor ground circuit for an open/high resistance
Measure the reistance of the A/C pressure sensor ground circuit between the A/C pressure sensor harness connector and the Totally Integrated Power Module harness connector.

Is the resistance below 3.0 Ohms?

Yes, go to step 7.
No, repair the A/C pressure sensor ground circuit for an open or high resistance.

Step 7. A/C pressure Transducer
Turn the ignition off, reconnect the TIPM harness connector. Connect a jumper between the A/C pressure sensor ground circuit and the A/C pressure sensor signal circuit at the A/C pressure sensor harness connector. Turn the ignition on, with the sacn tool read the A/C pressure sensor signal voltage.

Is the voltage below 1.0 volt with the jumper in place?

Yes, replace the A/C pressure Transducer.
No, go to step 8.

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