P062F on Toyota: How to Diagnose & Fix
Internal Control Module EEPROM Error
1 Toyota model · 1 documented issue · 1 critical
P062F on Toyota by model: symptoms, diagnosis and fix
Certain Highlanders are part of Toyota's large Denso low-pressure fuel pump recall (NHTSA 20V-012). The pump's resin impeller can absorb fuel, swell, and crack, causing the pump to seize. This leads to rough running, hard starting, and engine stalling — potentially at speed and without warning — creating a crash risk. The defect spans many Toyota/Lexus models; the Highlander was specifically named in the campaign.
Common Symptoms
- Engine stalls while driving, sometimes at speed
- Long crank / hard starting
- Rough idle or hesitation
- Illuminated check engine light
- Engine fails to restart after stalling
- Fuel system warning indicators
How to Fix
Under recall 20V-012 (and related expansions), Toyota dealers replace the low-pressure fuel pump assembly with an improved-impeller unit free of charge. Owners should run their VIN at nhtsa.gov or contact Toyota; vehicles showing stalling/hard-start symptoms before the pump is replaced should be inspected promptly.
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Sources for this issue (3)
P062F 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 P062F mean on a Toyota?
P062F stands for "Internal Control Module EEPROM Error." P062F sets when the ECM, TCM, or another control module detects a fault in its internal EEPROM (Electrically Erasable Programmable Read-Only Memory). The EEPROM stores calibration settings, learned/adaptive values, and software parameters; when the module's self-test finds this memory cannot be reliably read or written, it stores P062F. It is an internal module fault, not an external circuit issue. On Toyota it is documented across 1 model: Highlander.
What are the most common causes of P062F?
The most common causes of P062F are: Internal control module (ECM/TCM) hardware/memory failure, Corrupted EEPROM data from an interrupted or failed reflash, Voltage spikes or unstable power/ground to the module, Water intrusion or corrosion in the module, Aged module with degraded memory cells. The specific cause varies by vehicle.
How much does it cost to fix P062F on a Toyota?
Repair costs vary widely with the root cause and Toyota model; each issue on this page carries its own estimate where one is published.
Looking for P062F on a different make?
View P062F across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.