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 INSPECTIONP CODE CHARTSP2191
2006 BMW X5 (E53) V8-4.8L (N62)
P2191
2006 BMW X5 (E53) V8-4.8L (N62)SECTION P2191
29E5 - P2191
Information saved in
DME
Fault code
29E5 - P2191
Fault text
Fuel mixture adaptation, upper engine speed range
Fault description
System Too Lean at Higher Load (Bank 1)
Condition for fault identification
Test condition:
Fuel-supply system monitored with aid of mixture
adaptation data; here upper part-load range (multiplicative
adaptation), system too lean
Release conditions:
- No active EVAP purge-air discharge
- No faults that disable diagnosis are present
- Relative charge (load) > 55 %
- Mass airflow > 250 kg/h
- Compliance with temperature conditions
Terminal condition: Engine running
Voltage condition:
battery voltage < 11 volts or battery voltage > 16 volts
Condition for fault memory entry
Approximately 10 min.
Action in service
Induction vacuum leak/exhaust air leak (AFR O2 sensor !)
Low fuel pressure
Check oxygen sensors before cat.
Check tank EVAP air discharge (air leak !)
Check HFM (contamination, defect)
Fault effect and breakdown warning
Driver information
Warning light:
ECE MIL on (2nd cycle)
Service instruction
none
Information saved in
DME
Fault code
29E5 - P2191
Fault text
Fuel mixture adaptation, upper engine speed range
Fault description
System Too Lean at Higher Load (Bank 1)
Condition for fault identification
Test condition:
Fuel-supply system monitored with aid of mixture
adaptation data; here upper part-load range (multiplicative
adaptation), system too lean
Release conditions:
- No active EVAP purge-air discharge
- No faults that disable diagnosis are present
- Relative charge (load) > 55 %
- Mass airflow > 250 kg/h
- Compliance with temperature conditions
Terminal condition: Engine running
Voltage condition:
battery voltage < 11 volts or battery voltage > 16 volts
Condition for fault memory entry
Approximately 10 min.
Action in service
Induction vacuum leak/exhaust air leak (AFR O2 sensor !)
Low fuel pressure
Check oxygen sensors before cat.
Check tank EVAP air discharge (air leak !)
Check HFM (contamination, defect)
Fault effect and breakdown warning
Driver information
Warning light:
ECE MIL on (2nd cycle)
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.