P0606 — Engine control module (ECM) / powertrain control module processor fault

Code P0606 is a standard OBD-II diagnostic trouble code: Engine control module (ECM) / powertrain control module processor fault.

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In our record, P0606 is reported most often on Ford, Toyota and Chevrolet vehicles , against electrical and powertrain failure patterns , across 2005–2022 model years.

In ProblemsByVin's analysis of the NHTSA owner-complaint record, owners cite P0606 across 20 vehicle failure patterns. Diagnostic codes in complaints are reported by owners and are unverified — they point to where this code shows up, not a confirmed diagnosis. Open a page below for the full pattern (symptoms, mileage, repair costs owners cite).

Vehicles where owners report P0606 20 patterns

2022 GMC Sierra

electrical — Engine stalls and fails to restart

2018 Hyundai Sonata

electrical — Knock Sensor / Engine Control System Limp Mode

2017 Dodge Grand Caravan

powertrain — Transmission failure — loss of shift or stuck in gear

2016 Ford Fiesta

powertrain — Transmission Control Module (TCM) Failure

2016 Kia Sorento

cruise control — Stalling and loss of power on acceleration

2015 Ford Fiesta

engine — Cooling System Failure / Overheating

2015 Ford Edge

cruise control — Throttle Body Failure – Loss of Accelerator Response

2014 Ford Focus

electrical — Loss of power and stalling (limp mode / complete shutdown)

2014 Ford Fiesta

powertrain — Transmission shudder, jerking, and harsh shifting at low speeds

2011 Ford Fiesta

powertrain — PCM/TCM reprogramming updates fail or make problems worse

2011 Toyota Corolla

cruise control — Abnormal deceleration / failure to slow when accelerator released

2009 Chevrolet Equinox

powertrain — StabiliTrak/traction control system with engine power loss

2008 Audi A4

powertrain — Transmission Control Module (TCM) Failure

2007 Chevrolet Impala

electrical — Reduced Engine Power / Limp mode activation

2007 Saturn Ion

fuel system — Fuel pump module cracking/fracturing

2006 Toyota RAV4

electrical — Electronic Control Module (ECM) / Computer Malfunction

2005 Chevrolet Cobalt

electrical — Engine stalls without warning while driving

2005 Ford Five Hundred

engine — Fail Safe Engine Mode with stalling and loss of power

2005 Pontiac G6

electrical — Brake lights malfunction (inverted or non-responsive)

2005 Toyota Corolla

electrical — Engine Control Module (ECM/ECU) Failure

Codes are pulled from what owners wrote in their NHTSA filings — they're allegations, not a shop diagnosis. Always confirm with a live scan. Browse all diagnostic codes →