P0874moderate severityPowertrain
Transmission Fluid Pressure Sensor/Switch C Circuit Intermittent
on 2003 Audi A6 3.0L V6 · AWD
What this code means
The transmission fluid pressure sensor C circuit is showing an intermittent or erratic signal. Loose connections or wiring are the usual culprits.
Symptoms
- Occasional harsh shifts
- Intermittent warning light
- Momentary slipping
Common causes
- Loose or corroded connector
- Intermittent wiring fault
- Failing pressure sensor
- Contaminated transmission fluid
Diagnostic steps
- Wiggle test wiring and connectors
- Inspect connector pins for damage
- Monitor sensor signal while driving
- Check fluid level and condition
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