P0158 2008 Nissan Pathfinder Code - HO2S22 Circuit High Voltage
Quick Answer
The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Faulty Rear Heated Oxygen Sensor Bank 2, Rear Heated Oxygen Sensor Bank 2 harness is open or shorted, Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0158 2008 Nissan Pathfinder indicates HO2S22 Circuit High Voltage.
- Common causes
- Common causes include Faulty Rear Heated Oxygen Sensor Bank 2, Rear Heated Oxygen Sensor Bank 2 harness is open or shorted, Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0158 2008 Nissan Pathfinder Description
What are the Possible Causes of the DTC P0158 2008 Nissan Pathfinder?
- Faulty Rear Heated Oxygen Sensor Bank 2
- Rear Heated Oxygen Sensor Bank 2 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks
- Exhaust gas leaks
How to Fix the DTC P0158 2008 Nissan Pathfinder?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0158 2008 Nissan Pathfinder code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0158 2008 Nissan Pathfinder Code
1. What does the OBDII code P0158 mean on a 2008 Nissan Pathfinder?
P0158 indicates that the voltage signal from the downstream oxygen sensor (Bank 2, Sensor 2) is higher than expected, suggesting a rich air-fuel mixture or a circuit issue.
2. What are the symptoms of code P0158 on a 2008 Nissan Pathfinder?
Symptoms may include poor fuel economy, rough idling, black smoke from the exhaust, an illuminated Check Engine Light, or a failed emissions test.
3. What causes the P0158 code on a 2008 Nissan Pathfinder?
Common causes include a faulty downstream oxygen sensor (Bank 2, Sensor 2), a short or damaged wiring harness, exhaust leaks, a malfunctioning PCM, or excessive fuel delivery.
4. Can I drive my 2008 Nissan Pathfinder with a P0158 code?
While the vehicle may still be drivable, prolonged operation with this code can lead to increased emissions, poor performance, and potential damage to the catalytic converter.
5. How do I diagnose the P0158 code on a 2008 Nissan Pathfinder?
Start by inspecting the oxygen sensor wiring and connectors for damage or corrosion. Then, use a multimeter to test the sensor’s voltage output and verify proper function with a scan tool.
6. How do I fix the P0158 code on a 2008 Nissan Pathfinder?
Repairs may include replacing the Bank 2, Sensor 2 oxygen sensor, repairing damaged wiring, fixing exhaust leaks, or updating/reprogramming the PCM if necessary.
7. How much does it cost to fix the P0158 code on a 2008 Nissan Pathfinder?
The cost varies but typically ranges from $150 to $300 for a replacement oxygen sensor, plus any additional labor or repair costs for wiring or exhaust leaks.
8. Can a dirty air filter cause the P0158 code on a 2008 Nissan Pathfinder?
A dirty air filter is unlikely to directly cause this code, but it can contribute to a rich air-fuel mixture, which might exacerbate the issue.
9. What tools do I need to troubleshoot the P0158 code on a 2008 Nissan Pathfinder?
You'll need an OBDII scanner, a multimeter, and potentially a repair manual or wiring diagram for the vehicle to accurately diagnose and repair the issue.
10. Is replacing the oxygen sensor the only solution for the P0158 code on a 2008 Nissan Pathfinder?
Not necessarily. While the oxygen sensor is a common culprit, you should also inspect the wiring, connectors, exhaust system, and PCM before replacing parts.
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