P0606 on Chevrolet vehicles An internal processor fault in the engine control module
P0606 is named on 33 Chevrolet model years (2017–2026): 113 manufacturer filings and 4 owner reports in NHTSA’s files, across Silverado, Silverado 2500HD, Silverado 3500HD, Tahoe, Suburban and 6 more.
Which Chevrolet model years name P0606
Source: NHTSA manufacturer communications and complaintsA 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.
What Chevrolet owners said
Source: NHTSA complaint databaseOwners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.
Brakes and steering limited could not drive unsafe turned off ignition restarted threw five codes including P0606 C0021 P25A2 called onstar, they said all systems showing failed take to dealer called gm- they said to have it towed remote…
Chevrolet filings that name P0606
Source: NHTSA manufacturer communicationsBulletins and campaigns Chevrolet 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.
- PIT5634 Service bulletin2018-10-01 · Service Brakes
- This Preliminary information communicates and issue with acustomer concern of a SES MIL, Reduced Engine Power, Service Brake System, and/orSpeed Limited message,a lack of brake assist making the brake pedal hard andDTCP0606. These issues can be caused by a low voltage conditions, but the EBCM incorrectly sets a DTC P0606 for aControl Module Processor Performance error. If the SI diagnostics are fo
- PIT5634 Service bulletin2018-11-14 · Service Brakes, Hydraulic
- This Preliminary information communicates and issue with a customer concern of a SES MIL, Reduced Engine Power, Service Brake System, and/or Speed Limited message, a lack of brake assist making the brake pedal hard and DTC P0606. These issues can be caused by a low voltage conditions, but the EBCM incorrectly sets a DTC P0606 for a Control Module Processor Performance error. If the SI diagnostic
- PIT5728 Service bulletin2019-12-20 · Electrical System
- This Preliminary information communicates an issue with DTC P0606 and C0021 setting after completing campaign N192268090 and it provides information about using and maintaining proper battery voltage while programming the BSCM.
- PIT5946 Service bulletin2022-10-04 · 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.
- PIT5946A Service bulletin2023-01-04 · 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.
- PIT5946B Service bulletin2023-01-26 · 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.
- 24-NA-005 Service bulletin2024-01-10 · Exterior Lighting
- This technical bulletin provides repair information to correct a customer concern of Headlamps Flashing and/or DTC P0606 Set in Lighting Control Module.
- 24-NA-050 Service bulletin2024-03-11 · Service Brakes, Hydraulic
- This technical bulletin provides repair information to correct a customer concern of Silverado and Sierra Setting DTC P0606 and either DTC P0562 or P0563.
- 24-NA-050 Service bulletin2024-06-29 · Service Brakes
- This technical bulletin provides repair information to correct a customer concern of Silverado and Sierra Setting DTC P0606 and either DTC P0562 or P0563.
- PIT5946C Service bulletin2023-02-02 · 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 bulletin2026-06-10 · 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.
- 24-NA-087 Service bulletin2024-05-18 · Electrical System
- This bulletin provides a procedure to update the TCCM to correct a customer concern of Unable to Shift into 4WD and/or 4WD Inoperative - DTC P0606 Set.
What P0606 means
Source: SAE J2012 / OBD-IIAn internal processor fault in the engine control module.
A stored code names the test that failed, never the part that caused it. The record above is what Chevrolet and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs P0606 a known problem on Chevrolet vehicles?
It is a documented one: NHTSA's files hold 113 manufacturer filings and 4 owner reports naming P0606 on 33 Chevrolet model years (2017–2026). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Chevrolet models does P0606 appear on most?
2019 Silverado (14 documents), 2022 Silverado (7 documents), 2024 Silverado 2500HD (7 documents).
Does P0606 on a Chevrolet mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.