P1146 2005 NISSAN SENTRA - Heated Oxygen Sensor 2 Minimum Voltage Monitoring Bank 1
P1146 2005 NISSAN SENTRA Possible Causes
- Faulty heated oxygen (O2) sensor 2 (rear)
- Intake air leaks
- Heated oxygen (O2) sensor 2 (rear) harness is open or shorted
- Heated oxygen (O2) sensor 2 (rear) circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
How do I fix code P1146 2005 NISSAN SENTRA
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
P1146 2005 NISSAN SENTRA Tech NotesReplacing the O2 Sensor 2 usually takes care of the problem
Cost of diagnosing the P1146 2005 NISSAN SENTRA code
Labor: 1.0The cost of diagnosing the P1146 2005 NISSAN SENTRA code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
P1146 2005 NISSAN SENTRA Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- High Fuel Consumption
- Excessive Smoke from Exhaust
P1146 2005 NISSAN SENTRA MeaningThe Heated Oxygen Sensor 2 (HO2S) (Rear O2 Sensor), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture (air-fuel ratio) must be maintained near the ideal stoichiometric ratio. The HO2S output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Engine Control Module (ECM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The ECM interprets Lean when the HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The ECM interprets Rich when the HO2S voltage is above 0.45 V.
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