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 MANUALSBMW2010M5 (E60) V10-5.0L (S85)REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONP CODE CHARTSP0638CONDITION ACTUATOR REPORTS SYSTEM ERROR
2010 BMW M5 (E60) V10-5.0L (S85)
Condition Actuator Reports System Error
2010 BMW M5 (E60) V10-5.0L (S85)SECTION Condition Actuator Reports System Error
2B15 - P0638
Information saved in
DME
Fault code
2B15 - P0638
Fault text
Throttle-valve actuator, governor monitoring, Bank 1
Fault description
Condition for fault identification
Test condition:
Communications and CAN OK
Terminal condition: Terminal 87
Voltage condition:
none
Condition for fault memory entry
Actuator reports system error
Action in service
1. Delete stored DTCs from error memory, conduct system
test for electromotive throttle-valve actuator
2. Check plugs and wiring harness for throttle-valve sensor 1
and electromotive throttle-valve actuator 1
3. Replace throttle-valve sensor 1 or Bank 1 electromotive
throttle-valve actuator
Fault effect and breakdown warning
Engine speed limited to 3500 rpm / Check Control message /
power reduction / MIL comes on after engine runs 2x
Driver information
Warning light:
29-Engine malfunction
Service instruction
none
Information saved in
DME
Fault code
2B15 - P0638
Fault text
Throttle-valve actuator, governor monitoring, Bank 1
Fault description
Condition for fault identification
Test condition:
Communications and CAN OK
Terminal condition: Terminal 87
Voltage condition:
none
Condition for fault memory entry
Actuator reports system error
Action in service
1. Delete stored DTCs from error memory, conduct system
test for electromotive throttle-valve actuator
2. Check plugs and wiring harness for throttle-valve sensor 1
and electromotive throttle-valve actuator 1
3. Replace throttle-valve sensor 1 or Bank 1 electromotive
throttle-valve actuator
Fault effect and breakdown warning
Engine speed limited to 3500 rpm / Check Control message /
power reduction / MIL comes on after engine runs 2x
Driver information
Warning light:
29-Engine malfunction
Service instruction
none
RENDER: 1.0x
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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.