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!

Powertrain generic / SAE

P24CA

Particulate Matter Sensor Temperature Circuit Intermittent

Same as P24C6 with intermittent or erratic signal. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.

SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / CA

Possible causes

  • Intermittent contact at connector high
  • Connector with intermittent contact under vibration low
  • Harness routed against vibrating component low

Inspection / repair

  • Difficulty: medium
  • DIY: shop recommended
  • Estimated cost: 400–1200 €
  • Estimated time: 1–3 h
  • Component: particulate matter sensor
  • MIL / check engine light
  • emissions-relevant

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