P0263
Cylinder 1 Contribution/Balance
2001-2003 BMW 525iT E39 2.5L I6 🇷🇺
High SeverityPowertrain
Description
Cylinder 1 is not contributing its expected share of power output.
Symptoms
- Check Engine Light
- Rough idle
- Misfire
- Vibration
Common Causes
- Low compression cylinder 1
- Faulty injector
- Valve issue
- Head gasket leak
Diagnostic Steps
- Run power balance test
- Check compression
- Test injector
- Inspect valves
Repair Notes
Diagnose mechanical condition of cylinder 1.
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
P0263 on Other Vehicles
Common Questions
What does code P0263 mean on a 2001-2003 BMW 525iT E39?
P0263 stands for "Cylinder 1 Contribution/Balance". Cylinder 1 is not contributing its expected share of power output.
What are the symptoms of P0263 on a BMW 525iT E39?
Common symptoms of P0263 include: Check Engine Light, Rough idle, Misfire, Vibration.
What causes P0263 on a 2001-2003 BMW 525iT E39?
Common causes of P0263 include: Low compression cylinder 1, Faulty injector, Valve issue, Head gasket leak.