P1604 — manufacturer-specific powertrain code

P1604 is a manufacturer-specific powertrain code: it is defined by the carmaker, not by the OBD-II standard, so the same code can mean different things on different brands. Below are the vehicles and failure patterns where owners report it, drawn from NHTSA complaints — the most reliable guide to what it means in practice.

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In our record, P1604 is reported most often on Toyota and Subaru vehicles , against powertrain and engine failure patterns , across 2011–2019 model years. Toyota alone accounts for 91% of them.

In ProblemsByVin's analysis of the NHTSA owner-complaint record, owners cite P1604 across 11 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 P1604 11 patterns

2019 Subaru Crosstrek

engine — Ignition coil failure – recurrence after recall

2018 Toyota RAV4

powertrain — Stalling in Moving Traffic / Loss of Power and Difficulty Restarting

2018 Toyota Corolla

powertrain — CVT transmission failure with torque converter codes

2016 Toyota Camry

powertrain — Transmission Delay and Hesitation / Power Loss

2015 Toyota Highlander

electrical — Engine Stall and Loss of Power

2014 Toyota RAV4

electrical — Battery/Electrical System Fire

2013 Toyota Tundra

electrical — Secondary Air Injection (SAI) Pump System Failure

2013 Toyota Corolla

engine — Engine misfire with power loss and check engine lights

2012 Toyota Tundra

engine — Fuel Pump Density Sensor Malfunction (Flex-Fuel Trucks)

2011 Toyota Corolla

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

2011 Toyota Highlander

powertrain — Oil Cooler Pipe Rupture & Catastrophic Engine Damage

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 →