Au7o mascotAu7o
Known IssuesGet Started
P0606CriticalEngine

P0606: PCM Processor Fault

Found on 1 vehicle models across 1 makes

Share:

P0606 is an OBD-II diagnostic trouble code meaning “PCM Processor Fault.” Internal fault detected within the powertrain control module (PCM/ECU). The processor failed a self-test. According to Au7o's database, this code appears across 1 vehicle models from 1 manufacturers. Full vehicle-specific causes and solutions at au7o.io.

1
Vehicles Affected
1
Makes
1
Related Issues

Common Causes

1Failing ECU/PCM
2Low battery voltage during operation
3Corroded ECU connector
4Water intrusion in ECU
5Software glitch requiring reflash

Diagnostic Tools

To diagnose P0606, you'll need an OBD-II scanner. Here are our recommendations at every price point.

Budget Pick$10–$20

ANCEL AD310 Classic OBD-II Scanner

by ANCEL

A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).

  • Read & clear engine codes
  • View freeze frame data
  • I/M readiness status
  • No batteries or app needed
Check Price on Amazon
Best Value$90–$120

BlueDriver Pro Bluetooth Scanner

by BlueDriver

Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.

  • Enhanced diagnostics (ABS, SRS, transmission)
  • Repair Reports with verified fixes
  • Smog check readiness
  • Free app (iOS & Android)
Check Price on Amazon
Advanced$180–$230

LAUNCH CRP123X OBD-II Scanner

by LAUNCH

A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.

  • Engine, transmission, ABS, SRS diagnostics
  • Live data stream & graphing
  • AutoVIN for vehicle identification
  • Free lifetime updates via Wi-Fi
Check Price on Amazon
Professional$350–$450

Autel MaxiCOM MK808S Diagnostic Tool

by Autel

Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.

  • All-system diagnostics (25+ modules)
  • Bi-directional control & active tests
  • Oil reset, EPB, BMS, TPMS, injector coding
  • 7-inch touchscreen with Android OS
Check Price on Amazon

As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.

Vehicles Affected by P0606

Click any vehicle to see the full issue details, symptoms, and repair guide.

Related Codes

002FManufacturer-Specific Diagnostic Code16566Mass Air Flow Sensor Signal Too Low (VAG)ECM-940AEngine Control Module Fault (Volvo)P0008Engine Position System Performance - Bank 1P0009Engine Position System Performance - Bank 2P0010Intake Camshaft Position Actuator Circuit (Bank 1)P0011Intake Camshaft Position Timing - Over-Advanced (Bank 1)P0012Intake Camshaft Position Timing - Over-Retarded (Bank 1)

Frequently Asked Questions

What does P0606 mean?

P0606 stands for "PCM Processor Fault." Internal fault detected within the powertrain control module (PCM/ECU). The processor failed a self-test.

What are the most common causes of P0606?

The most common causes of P0606 are: Failing ECU/PCM, Low battery voltage during operation, Corroded ECU connector, Water intrusion in ECU, Software glitch requiring reflash. The specific cause varies by vehicle — Au7o documents vehicle-specific causes for 1 models.

How much does it cost to fix P0606?

Repair costs vary widely depending on the root cause and vehicle. Check the vehicle-specific issues below for estimated costs.

Which vehicles are affected by P0606?

Au7o has documented P0606 across 1 vehicle models from 1 manufacturers: Jeep. See the full list below for vehicle-specific causes and repair costs.

Get a DIY Repair Guide for Your Vehicle

AI-powered step-by-step repair and maintenance guides tailored to your exact vehicle. Enter your year, make, and model to get started.

Get Started Free