Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLEXUS2011GS 450H V6-3.5L (2GR-FSE) HYBRIDREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONP CODE CHARTSP0657
2011 Lexus GS 450h V6-3.5L (2GR-FSE) Hybrid
P0657
2011 Lexus GS 450h V6-3.5L (2GR-FSE) HybridSECTION P0657
2GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0657: Actuator Supply Voltage Circuit / Open
P0657 - Actuator Supply Voltage Circuit / Open
DESCRIPTION
The ECM monitors the output voltage to the throttle actuator. This self-check ensures that the ECM is functioning properly. The output voltage is usually 0 V when the power switch is turned off. If the output voltage is higher than 7 volts when the power switch is turned off, the ECM will illuminate the MIL and set a DTC when the power switch on (IG).
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
INSPECTION PROCEDURE
PROCEDURE
1. CHECK WHETHER DTC OUTPUT RECURS (IN ADDITION TO DTC P0657)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTC DTC Check / Clear.
(e) Turn the power switch off.
(f) Disconnect the battery negative terminal and wait for 1 minute.
(g) Connect the battery negative terminal.
(h) Turn the power switch on (IG) for 10 seconds.
(i) Turn the power switch off.
(j) Turn the power switch on (IG).
(k) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(l) Read the DTCs.
Result:
B -- CHECK FOR INTERMITTENT PROBLEMS Check For Intermittent Problems
A -- REPLACE ECM Removal
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.