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 MANUALSBMW2006X5 (E53) V8-4.8L (N62)REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSTRANSMISSION CONTROL SYSTEM4EFC
2006 BMW X5 (E53) V8-4.8L (N62)
4EFC
2006 BMW X5 (E53) V8-4.8L (N62)SECTION 4EFC
4EFC - P171F
Information saved in
GS
Fault code
4EFC - P171F
Fault text
not translated
Fault description
Internal Transmission Control Module Component CG122
Error
Condition for fault identification
none
Condition for fault memory entry
none
Action in service
none
Fault effect and breakdown warning
Driver information
none
Service instruction
none
Information saved in
GS
Fault code
4EFC - P171F
Fault text
not translated
Fault description
Internal Transmission Control Module Component CG122
Error
Condition for fault identification
none
Condition for fault memory entry
none
Action in service
none
Fault effect and breakdown warning
Driver information
none
Service instruction
none
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.