P0852moderate severityPowertrain
Park/Neutral Switch Input Circuit High
on 2000 Audi A6 2.7L Turbo V6 · AWD
What this code means
The PCM detects an abnormally high voltage on the park/neutral switch input. This can interfere with starter enable and gear detection logic.
Symptoms
- Engine cranks in wrong gear
- No-start condition
- Wrong gear indicated
Common causes
- Faulty park/neutral switch
- Open or high resistance in wiring
- Short to voltage in circuit
- Failed range sensor
Diagnostic steps
- Read codes and freeze frame data
- Inspect PNP switch and harness
- Measure input voltage in each gear
- Repair wiring or replace switch
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