P0846moderate severityPowertrain
Transmission Fluid Pressure Sensor/Switch B Circuit Range/Performance
on 2002 Audi A6 3.0L V6 · AWD
What this code means
The pressure sensor or switch B signal is out of range compared to expected values. This usually indicates sensor drift or a hydraulic pressure issue.
Symptoms
- Slipping transmission
- Harsh or delayed shifts
- Check engine light on
Common causes
- Faulty pressure sensor B
- Low or contaminated fluid
- Clogged valve body
- Wiring or connector fault
Diagnostic steps
- Scan codes and view freeze frame
- Verify fluid level and quality
- Compare sensor B reading to actual pressure
- Inspect valve body and hydraulic passages
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