Fuel Control Mixture Rich Bank 2
1997-2000 BMW 528i E39 2.8L I6 🇦🇺
Description
The DME detected a rich fuel mixture condition on Bank 2 that is beyond the adaptive fuel trim correction range. Fuel trims have reached their maximum negative adjustment limit.
Symptoms
- Check Engine Light
- Black smoke from exhaust
- Strong fuel odor
- Rough idle
- Reduced power
Common Causes
- Leaking fuel injectors Bank 2
- Faulty O2 sensor Bank 2
- Fuel pressure too high
- EVAP system fault
- Crankcase vent valve stuck open
Diagnostic Steps
- Monitor Bank 2 fuel trims
- Test O2 sensor Bank 2 response time
- Check fuel pressure with gauge
- Test EVAP purge valve
- Inspect CCV system
Repair Notes
Diagnose and repair the root cause of excess fuel delivery on Bank 2.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1086 on Other Vehicles
Common Questions
What does code P1086 mean on a 1997-2000 BMW 528i E39?
P1086 stands for "Fuel Control Mixture Rich Bank 2". The DME detected a rich fuel mixture condition on Bank 2 that is beyond the adaptive fuel trim correction range. Fuel trims have reached their maximum negative adjustment limit.
What are the symptoms of P1086 on a BMW 528i E39?
Common symptoms of P1086 include: Check Engine Light, Black smoke from exhaust, Strong fuel odor, Rough idle, Reduced power.
What causes P1086 on a 1997-2000 BMW 528i E39?
Common causes of P1086 include: Leaking fuel injectors Bank 2, Faulty O2 sensor Bank 2, Fuel pressure too high, EVAP system fault, Crankcase vent valve stuck open.