# P0606 — PCM Processor Fault

> ClearTheCode diagnostic code reference (not OEM service data).

Source: https://clearthecode.com/codes/P0606

**System:** Powertrain · Computer Output / Network

**Severity:** severe

## Description

PCM internal processor error. Re-flash or replace the PCM.

## Diagnostic snapshot

- **Difficulty:** 6/10 — Intermediate diagnostics
- **Est. repair cost:** $120 – $450

## Diagnostic workflow

1. Confirm P0606 with a live scan — note pending vs stored and freeze frame data.
2. Inspect wiring/connectors and related sensors before replacing modules.
3. Clear codes and road-test; re-scan after two drive cycles if the monitor must set.

## Related articles

- [P0606 field guide: PCM / ECM processor performance](https://clearthecode.com/articles/p0606-pcm-processor-performance-field-guide)