P1127 ETCS Actuator Power Source Circuit Malfunction

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: Camry, Corolla, RAV4 with ETCS-i

What does P1127 mean on a Toyota?

P1127 — ETCS Actuator Power Source Circuit Malfunction. This Toyota-enhanced code applies to Camry, Corolla, RAV4 with ETCS-i.

Common causes of P1127

Blown ETCS power fuse
Open actuator power feed
Corroded power relay contacts
Damaged harness
Failing ETCS relay

How to fix P1127

Check ETCS fuses under load
Verify power at the throttle actuator
Test the ETCS relay
Inspect power wiring
Repair the feed circuit