B2793 2017 Toyota RAV4 Code - Transponder Chip Malfunction

B2793 indicates a "Transponder Chip Malfunction," meaning the vehicle's immobilizer system cannot properly detect the transponder chip in the key.

Symptoms include the engine not starting, the immobilizer warning light staying on, and a possible "key not detected" message.

Common causes include a damaged or faulty key transponder chip, interference from electronic devices, a malfunctioning key antenna, or issues with the immobilizer system's ECU.

No, the engine won’t start because the immobilizer system prevents it from running when the code is active.

Fixes may involve reprogramming or replacing the key, inspecting the key antenna, and checking the immobilizer system’s wiring and ECU for faults.

No, a dead key fob battery typically prevents remote functions but doesn’t cause this code. The problem is related to the transponder chip inside the key.

Costs vary depending on the issue. Replacing or reprogramming a key may cost $100–$300, while more extensive repairs to the immobilizer system can be more expensive.

Clearing the code without addressing the underlying problem will not resolve the issue, and the code will likely return.

Avoid dropping or damaging the key, keep electronic devices away from the key when starting the car, and maintain the immobilizer system in good condition.

Not always. The key might just need reprogramming or inspection. However, if the transponder chip is damaged, replacing the key may be necessary.