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 CHARTSP2247
2010 BMW M5 (E60) V10-5.0L (S85)
P2247
2010 BMW M5 (E60) V10-5.0L (S85)SECTION P2247
274F - P2247
Information saved in
DME
Fault code
274F - P2247
Fault text
Bank 2 pre-catalyst oxygen sensor Nernst cell wire fault
Fault description
Condition for fault identification
Test condition:
* Engine temperature > K_LAVK_OBD_TMOT * relative
induction charge within the limits
K_LAVK_OBD_PLAU_RF_Max and
K_LAVK_OBD_PLAU_RF_Min; no dynamic response *
exhaust-gas temperature within the limits
K_LAVK_OBD_PLAU_TKat_Max and
K_LAVK_OBD_PLAU_TKat_Min * after W
Terminal condition: Engine running -
idle or partial load
Voltage condition:
none
Condition for fault memory entry
* Query for controller at min. limit and cold oxygen sensor
(heater error) => leads to oscillator deactivation * Check of
oxygen sensor voltage whether at lower threshold
K_LAVK_OBD_PLAU_UN_SCHW
Action in service
1. Check plug and wiring harness at Bank 2 pre-catalyst
oxygen sensor (especially UN Nernst voltage)
2. If OK, replace sensor
Fault effect and breakdown warning
MIL lamp on after engine runs 2x / Small influence on
drivability
Driver information
Warning light:
No
Service instruction
none
Information saved in
DME
Fault code
274F - P2247
Fault text
Bank 2 pre-catalyst oxygen sensor Nernst cell wire fault
Fault description
Condition for fault identification
Test condition:
* Engine temperature > K_LAVK_OBD_TMOT * relative
induction charge within the limits
K_LAVK_OBD_PLAU_RF_Max and
K_LAVK_OBD_PLAU_RF_Min; no dynamic response *
exhaust-gas temperature within the limits
K_LAVK_OBD_PLAU_TKat_Max and
K_LAVK_OBD_PLAU_TKat_Min * after W
Terminal condition: Engine running -
idle or partial load
Voltage condition:
none
Condition for fault memory entry
* Query for controller at min. limit and cold oxygen sensor
(heater error) => leads to oscillator deactivation * Check of
oxygen sensor voltage whether at lower threshold
K_LAVK_OBD_PLAU_UN_SCHW
Action in service
1. Check plug and wiring harness at Bank 2 pre-catalyst
oxygen sensor (especially UN Nernst voltage)
2. If OK, replace sensor
Fault effect and breakdown warning
MIL lamp on after engine runs 2x / Small influence on
drivability
Driver information
Warning light:
No
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.