Transmission or Brake Binding Issue
The vehicle is in gear but won't move when the engine is warm, suggesting a transmission problem (e.g., low fluid, torque converter failure) or a seized brake caliper preventing movement. The warm engine condition points to fluid viscosity or thermal expansion issues.
Diagnosis Details
Possible Causes
Low or contaminated automatic transmission fluid (ATF) causing insufficient hydraulic pressure to engage gears when warm.
Seized brake caliper or stuck parking brake mechanism, especially if the vehicle feels like it's being held back.
Torque converter failure or internal transmission damage (e.g., worn clutches) that manifests when fluid thins at operating temperature.
Related OBD-II Codes
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What You Should Do
Check transmission fluid level and condition (warm, engine running, in Park).
Inspect for brake drag by jacking up each wheel and spinning it.
If fluid is low, top off and test; if brakes are seized, service calipers.
If neither resolves, have a professional diagnose transmission internals.
Related Repairs
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
