p1148
Moderate
Nissan · Sedans
Closed Loop Control Function Bank 1
Quick Answer
Error code P1148 on your Nissan Sedans means: Closed Loop Control Function Bank 1. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
  1. Faulty oxygen sensor
  2. Wiring issues in oxygen sensor circuit
  3. Fuel system pressure problem
  4. Mass airflow sensor defect
  5. Engine control module issue
How to Fix It
1
Inspect oxygen sensor wiring and connectors
2
Test oxygen sensor voltage switching
3
Check fuel system pressure
4
Test MAF sensor operation
5
Replace oxygen sensor if defective
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Oxygen sensor
MAF sensor
Fuel filter
Electrical connectors
Related Error Codes
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