A pressure reading may look believable while the sensor also reports a status problem. Looking only at the main value can miss why the receiving ECU rejects it.

What to check next

A useful assessment compares the decoded status with the raw signal and the ECU fault record. Check whether the status changes at the same moment as the vehicle symptom. Supply disturbance and an incorrect decoding layout must be excluded before interpreting it as an internal sensor defect.

Useful information for an enquiry

Include a complete scan and the unedited waveform, not just a screenshot of the pressure value.

The meaning of individual status bits belongs to that sensor specification. A generic decoder label is not a vehicle-specific repair instruction.

Speak to AXION

For complex vehicle-electronics diagnostics, send your vehicle details and fault report. Workshop assessment is in Didcot, Oxfordshire. Suitable postal or remote work is confirmed before booking.

Technical background from Pico Technology. The referenced design explains the principle; the vehicle-specific procedure determines the repair.

Related reading — SENT data nibbles combined in the wrong order. Browse all vehicle-electronics diagnostic notes or return to the repair library.