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 MANUALSSUBARU2007LEGACY I, 4D WAGON, AUTOMATICREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSIMMOBILIZER (DIAGNOSTICS)DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)DTC P1571 REFERENCE CODE INCOMPATIBILITYDTC DETECTING CONDITION
2007 Subaru Legacy i, 4D Wagon, Automatic
DTC P1571 Reference Code Incompatibility: DTC Detecting Condition
2007 Subaru Legacy i, 4D Wagon, AutomaticSECTION DTC Detecting Condition
Reference code incompatibility between body integrated unit and ECM
DIAGNOSTIC PROCEDURE CHART
| Step | Check | Yes | No |
|---|---|---|---|
| 1 PERFORM REGISTRATION ON IGNITION KEY. Perform registration on all keys of the vehicle. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
Is registration for all keys complete? | END. | Go to step 2. |
| 2 CHECK FOR ANY OTHER DTC ON DISPLAY. | Is any other immobilizer DTC displayed? | Check the appropriate DTC using the "List of Diagnostic Trouble Code (DTC)". <Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > Execute the registration procedure next. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". | Replace the ECM. <Ref. to ENGINE CONTROL MODULE (ECM) . > <Ref. to ENGINE CONTROL MODULE (ECM) . > Replace the body integrated unit <Ref. to BODY INTEGRATED UNIT .> and replace all the ignition keys (including transponder). Execute the registration procedure next. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER". |
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.