OBD code P0159 indicates an issue with the Rear Heated Oxygen Sensor Bank 2 in the vehicle’s exhaust system.
Symptoms include the Engine Light ON, high fuel consumption, and excessive exhaust smoke.
Causes may include a faulty sensor, wiring harness issues, fuel pressure problems, or intake/exhaust leaks.
This code should be addressed promptly to prevent further damage.
A possible fix involves inspecting and repairing the sensor, wiring, and related components.
| Repair Importance Level | 6.67 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 6.67 (Out of 10) |
Symptoms of the p0159 OBD Code
The vehicle may experience issues related to the bank 2 sensor 2 oxygen sensor circuit.
- With OBD code P0159, the symptoms may include: Engine Light ON.
- High Fuel Consumption.
- Excessive Smoke from Exhaust.
Causes of the p0159 OBD Code
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Possible triggers for fault code P0159 include issues with the bank 2 sensor 2 oxygen sensor.
- P0159 can be caused by a faulty Rear Heated Oxygen Sensor Bank 2.
- A Rear Heated Oxygen Sensor Bank 2 harness that is open or shorted.
- A Rear Heated Oxygen Sensor Bank 2 circuit with poor electrical connection.
- Inappropriate fuel pressure.
- Faulty fuel injectors.
- Intake air leaks that may be faulty.
- Exhaust gas leaks.
Fixing Error Code p0159 Step By Step
Replace faulty bank 2 sensor 2 oxygen sensor to address P0159 fault code.
- To fix OBDII code P0159, start by reviewing the possible causes mentioned above.
- Visually examine the corresponding wiring harness and connectors for any damage.
- Check the connector pins for signs of being broken, bent, pushed out, or corroded.
- If any issues are found, repair or replace the damaged components as necessary.
- Clear the fault code from the vehicle’s computer using a scan tool.
- Finally, test drive the vehicle to ensure the code does not return, indicating a successful repair.
Cost Of Fixing p0159 Fault Code
Diagnosing and repairing fault code P0159 may involve testing and replacing the bank 2 sensor 2 oxygen sensor.
The cost to diagnose and fix OBD code P0159 typically ranges from $75 to $150, with an estimated repair time of 1. 0 hour.
Factors affecting the cost include shop rates, complexity of the issue, and any additional parts or labor needed for the repair.
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Details of the p0159 OBD Code
P0159 code indicates a slow response from the oxygen sensor bank 2 sensor 2.
OBD code P0159 means O2 Sensor Circuit Slow Response Bank 2 Sensor 2. This code is triggered when the downstream oxygen sensor (sensor 2) in bank 2 of the exhaust system takes too long to respond to changes in the airfuel mixture.
The ECM monitors the signal from this sensor to ensure the catalytic converter is functioning properly.
Mechanic’s Tech Notes
Code P0159 indicates a slow response from the oxygen sensor bank 2 sensor 2.
To diagnose and fix OBDII code P0159, start by checking the wiring harness and connectors related to the bank 2 sensor 2 oxygen sensor.
Use a voltmeter to test the sensor’s voltage signal and ground connections.
Ensure the sensor is receiving power and ground as per specifications.
If the wiring and connections look good, the issue may lie with a faulty oxygen sensor itself.
Consider replacing the bank 2 sensor 2 oxygen sensor if all other components check out.
Remember to clear the code after any repairs and recheck to confirm the issue is resolved.
FAQ
OBD code P0159 indicates an issue with the Rear Heated Oxygen Sensor Bank 2. Check sensor, wiring, fuel pressure, injectors, and intake/exhaust leaks for faults.
Symptoms of P0159 code: Engine Light ON, High Fuel Consumption, Excessive Smoke from Exhaust. Causes: Faulty Rear O2 Sensor, wiring issues. Fix: Inspect wiring, connectors, components for damage.
Diagnose and repair P0159 by checking rear oxygen sensor, wiring, fuel system, and intake/exhaust for faults. Inspect connectors and wiring for damage or corrosion.
Wrap Up
If your check engine light is on and you’re experiencing poor fuel economy with OBDII code P0159, it may be caused by a faulty bank 2 sensor 2 oxygen sensor, wiring issues, or a vacuum leak affecting the sensor’s readings.
To address P0159, start by checking the wiring harness for any visible damage or corrosion.
Test the sensor’s connectors for a secure fit and proper voltage supply.
If necessary, replace the bank 2 sensor 2 oxygen sensor to resolve the issue.
