P062B on Toyota
Internal Control Module Fuel Injector Control Performance
P062B on Toyota vehicles indicates internal control module fuel injector control performance. Au7o has documented this code across 2 Toyota models — most commonly on Sienna, Tundra. This code indicates the engine computer (ECM/PCM) detected an internal performance fault within its own fuel injector control circuitry. The module continuously self-tests its ability to properly drive and monitor the fuel injectors. Because the fault is internal to the controller, it can cause sudden and serious drivability problems such as misfires, stalling, or no-start without warning.
Common Causes of P062B
- •Internal ECM/PCM fault
- •Low or unstable battery/system voltage
- •Faulty ECM ground or power connections
- •Recent reprogramming/software issue
- •Corroded ECM connectors
- •Wiring faults affecting module power supply
P062B on Toyota by Model
Toyota Sienna(1 issue)
- Denso Low-Pressure Fuel Pump Failure Causing Engine Stall (Recall 20V-682 / 20TA02)2017-2020
The Denso-built low-pressure (in-tank) fuel pump can fail without warning. The pump impeller was molded from a lower-density resin that absorbs fuel over time, swells, and binds against the pump housing, stopping the pump. This cuts fuel delivery and causes the engine to stall, often at speed. It was covered under NHTSA recall 20V-682 (Toyota 20TA02), an expansion of 20V-012, affecting roughly 2017-2020 Siennas alongside many other Toyota/Lexus models.
Toyota Tundra(1 issue)
- Denso Low-Pressure Fuel Pump Failure and Stalling (Recall)2014-2020
Tundras built with certain Denso low-pressure (in-tank) fuel pumps have a defectively designed plastic impeller that can absorb fuel, swell/deform, and strike the pump housing — causing the pump to seize. The result is hard starting, rough running, illuminated warning lights, and engine stalling, including potentially at speed, which is a crash risk. Toyota recalled millions of Toyota/Lexus vehicles (pump part numbers beginning 23220/23221) starting January 2020 and expanded it repeatedly; affected Tundra model years fall within the 2014-2020 range. A class-action settlement created a Customer Support Program extending coverage to 15 years from original sale for fuel-pump repairs.
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View P062B across all makes →Frequently Asked Questions
What does P062B mean on Toyota?▼
P062B stands for "Internal Control Module Fuel Injector Control Performance." This code indicates the engine computer (ECM/PCM) detected an internal performance fault within its own fuel injector control circuitry. The module continuously self-tests its ability to properly drive and monitor the fuel injectors. Because the fault is internal to the controller, it can cause sudden and serious drivability problems such as misfires, stalling, or no-start without warning. On Toyota specifically, this code is documented across 2 models.
What causes P062B on Toyota vehicles?▼
Common causes on Toyota: Internal ECM/PCM fault, Low or unstable battery/system voltage, Faulty ECM ground or power connections, Recent reprogramming/software issue, Corroded ECM connectors. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P062B on a Toyota?▼
Repair costs vary widely depending on the root cause and specific Toyota model.
Which Toyota models have P062B documented?▼
Au7o has documented P062B on 2 Toyota models: Sienna, Tundra.