P0606 on Cadillac vehicles An internal processor fault in the engine control module

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Bulletins and campaigns Cadillac filed with NHTSA whose summary names P0606. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

• PIT6347 Service bulletin
  2025-02-25 · Service Brakes
• This Preliminary information communicates an issue with ABS SES MIL / Service Brake System / Service StabiliTrak / BSCM DTC P0606 P0562 and engineering is currently investigating.
• PIT6347A Service bulletin
  2025-03-11 · Service Brakes
• This Preliminary information communicates an issue with ABS SES MIL / Service Brake System / Service StabiliTrak / BSCM DTC P0606 P0562 and dealers to perform additional battery and connection testing.
• PIT6347B Service bulletin
  2026-03-26 · Unknown Or Other
• This Preliminary information communicates an issue with ABS SES MIL / Service Brake System / Service StabiliTrak / BSCM DTC P0606 P0562 and dealers to perform additional battery and connection testing.
• PIT5946 Service bulletin
  2022-10-04 · Structure
• This Preliminary information communicates a diagnostic tip on how to resolve a issue with the Body Control Module setting DTC: P0606 and turning on a Check Engine Lamp.
• PIT5946B Service bulletin
  2023-01-26 · Structure
• This Preliminary information communicates a diagnostic tip on how to resolve a issue with the Body Control Module setting DTC: P0606 and turning on a Check Engine Lamp.
• PIT5946C Service bulletin
  2023-02-02 · Electrical System
• This Preliminary information communicates a diagnostic tip on how to resolve a issue with the Body Control Module setting DTC: P0606 and turning on a Check Engine Lamp.
• PIT6522 Service bulletin
  2026-06-10 · Unknown Or Other
• This PI advises dealers that if the K160 Brake System Control Module sets DTC P0606 along with P0562 and/or P25A2, additional diagnostic aids should be followed before replacing parts. The PI provides guidance to inspect for low voltage conditions, wiring, terminal concerns, and module communication issues that may cause false or intermittent EBCM DTCs.
• 20NA073 Service bulletin
  2020-09-22 · Service Brakes
• This technical bulletin provides repair information to correct a customer concern of Loss of Brake Assist, Various Messages Displayed in Driver Information Center (DIC), Brake Pedal Travel and Apply May Feel Different, One or More of the Following DTCs May be Set: P0606 with C0021, C05D2, C0595, C2A3B, C0024, C053D, P25A2.
• N192287020 Service bulletin
  2020-10-07 · Engine And Engine Cooling — Engine — Engine Control Module (Ecu/Ecm)
• Service Update - Certain 2019-2020 model year Cadillac CT6 vehicles equipped with a 10 speed transmission, (RPO MHS or MHW) may have a condition when shifting into park, resulting in a momentary loss of park engagement. If this were to occur, one or more of the following DTC codes P0606, P06AF or P07E4 may set and illuminate the check engine light. Dealers will reprogram the ECM.
• PIC5978A Service bulletin
  2016-10-27 · Equipment — Other — Owners/Service/Other Manual
• This Preliminary Information communication provides information to the technician about vehicles that have Diagnostic Trouble Code P0606 during normal vehicle servicing procedures such as clearing codes or connecting the 12 volt battery. To clear the Diagnostic Trouble Code technician will need to close all doors and rear hatch, press and hold the power button to put the vehicle into service mode,
• PIC5978B Service bulletin
  2019-04-24 · Electrical System
• This Preliminary Information communication provides information to the technician about vehicles that have Diagnostic Trouble Code P0606 during normal vehicle servicing procedures such as clearing codes or connecting the 12 volt battery. To clear the Diagnostic Trouble Code technician will need to close all doors and rear hatch, press and hold the power button to put the vehicle into service mode,

A stored code names the test that failed, never the part that caused it. The record above is what Cadillac and its owners have filed about it; the code’s page across every make has the whole file.