P062B: How to Diagnose & Fix — Internal Control Module Fuel Injector Control Performance
2 vehicles · 1 makes
How to diagnose and fix P062B: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Toyota Sienna · 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.
Common Symptoms
- Engine stalls or dies while driving, sometimes at highway speed
- Long crank / hard start, especially when warm
- Rough running, sputtering, or hesitation before stalling
- Check engine light with lean or fuel-trim codes in some cases
- Whining or no sound from fuel tank at key-on
How to Fix
Have the vehicle checked against recall 20V-682/20TA02 at any Toyota dealer; the remedy is free replacement of the fuel pump assembly with the redesigned (higher-density impeller) unit. Owners of unrepaired vehicles experiencing hard starts, rough running, or a sudden stall with no DTC for misfire should suspect the pump. Replacement of the full fuel pump/sender assembly out of warranty runs roughly $600-$1,000.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Sources for this issue (3)
Toyota Tundra · 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.
Common Symptoms
- Engine stalls while driving or at idle
- Long crank / hard starting
- Rough running or hesitation
- Check engine light
- Whining or no fuel-pump prime noise
- Fuel-related warning lights
How to Fix
Covered under Toyota recall / Customer Support Program — dealer replaces the low-pressure fuel pump with an improved-impeller design at no charge. Verify the VIN on the NHTSA or Toyota recall site. Out-of-coverage replacement involves dropping or accessing the in-tank pump assembly. Reimbursement may be available for prior out-of-pocket repairs.
Sources for this issue (3)
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P062B code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P062B mean?
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.
What are the most common causes of P062B?
The most common causes of P062B are: 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. The specific cause varies by vehicle.
How much does it cost to fix P062B?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P062B?
Au7o has documented P062B across 2 vehicle models from 1 manufacturers: Toyota.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.