What causes P1645 on a Toyota?

Internal body ECU fault Water intrusion into the ECU Low system voltage Failed programming attempt Corroded ECU connectors

How do I fix P1645 on a Toyota?

Check for water damage at the ECU Verify system voltage Scan the body ECU for specific faults Attempt reprogramming where applicable Replace the ECU after external exclusion

P1645 Body Control Module Malfunction

Q: What does P1645 mean on a Toyota?

P1645 — Body Control Module Malfunction. Applies to Camry, Corolla, RAV4 with body ECUs.

Category: Body
Severity: Check Engine Light
Applies to: Camry, Corolla, RAV4 with body ECUs

What does P1645 mean on a Toyota?

P1645 — Body Control Module Malfunction. This Toyota-enhanced code applies to Camry, Corolla, RAV4 with body ECUs.

Common causes of P1645

Internal body ECU fault
Water intrusion into the ECU
Low system voltage
Failed programming attempt
Corroded ECU connectors

How to fix P1645

Check for water damage at the ECU
Verify system voltage
Scan the body ECU for specific faults
Attempt reprogramming where applicable
Replace the ECU after external exclusion