P1658 Turbocharger Wastegate Regulating Valve Circuit

Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: Hilux, Land Cruiser Prado diesel

What does P1658 mean on a Toyota?

P1658 — Turbocharger Wastegate Regulating Valve Circuit. This Toyota-enhanced code applies to Hilux, Land Cruiser Prado diesel.

Common causes of P1658

Failed wastegate regulating valve
Open or shorted valve circuit
Sticking wastegate
Corroded connector
ECM driver fault

How to fix P1658

Test valve resistance
Check wastegate movement
Verify circuit wiring
Command boost and watch response
Replace the valve after circuit proof