DTC Troubleshooting: P0533
DTC P0533:
 A/C Pressure Sensor Circuit High Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
  1. Start the engine, and let it idle.
  1. Turn the blower switch on.
  1. Turn the A/C switch on.
  1. Check the A/C PRESSURE SENSOR in the DATA LIST with the HDS.
Is there about 4.75 V or more?
YES -
Go to Step 5 .
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/C pressure sensor and the ECM/PCM.■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the A/C pressure sensor 3P connector.
  1. Connect A/C pressure sensor 3P connector terminals No. 2 and No. 3 with a jumper wire.
  1. Turn the ignition switch to ON (II).
  1. Check the A/C PRESSURE SENSOR in the DATA LIST with the HDS.
Is there about 4.75 V or more?
YES -
Go to Step 10 .
NO -
Go to Step 22 .
  1. Turn the ignition switch to LOCK (0).
  1. Remove the jumper wire from the A/C pressure sensor 3P connector.
  1. Turn the ignition switch to ON (II).