P1277 Port Injector Circuit Number 2

Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: Toyota models with D-4S port injection

What does P1277 mean on a Toyota?

P1277 — Port Injector Circuit Number 2. This Toyota-enhanced code applies to Toyota models with D-4S port injection.

Common causes of P1277

Open number 2 port injector circuit
Failed injector 2
Corroded connector
Harness damage
ECM fault

How to fix P1277

Test injector 2 resistance
Verify pulse signal
Check wiring continuity
Inspect the connector
Replace the injector per tests