OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Body generic / SAE

B0288

HVAC A/C Pressure Sensor Circuit

A fault has been detected in the A/C refrigerant pressure sensor circuit. The compressor may be disabled to protect the system.

SystemBody
Typegeneric / SAE
GroupB0
Range / number2 / 88

Possible causes

  • Pressure sensor failure high
  • Low refrigerant charge medium
  • Faulty sensor connector medium

Symptoms

  • Warning light or symbol related to the affected system
  • Comfort or safety function impaired

Inspection / repair

  • Difficulty: easy
  • DIY: possible
  • Estimated cost: 60–250 €
  • Estimated time: 0.4–1.5 h
  • Component: ac pressure sensor
  • Component: ac compressor relay
  • Component: hvac control module

Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication