P0158 Mitsubishi Code - Cylinder 2-3 Heated Oxygen Rear Sensor 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 Mitsubishi indicates Cylinder 2-3 Heated Oxygen Rear Sensor 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 Mitsubishi Description
What are the Possible Causes of the DTC P0158 Mitsubishi?
- 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 Mitsubishi?
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 Mitsubishi 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 Mitsubishi Code
What does the OBDII code P0158 mean for a Mitsubishi?
It indicates high voltage in the heated oxygen sensor circuit for the rear sensor on cylinders 2-3, suggesting an issue with the sensor or related components.
What are the common symptoms of code P0158 in a Mitsubishi?
Symptoms may include poor fuel economy, rough idling, engine hesitation, and an illuminated check engine light.
What causes code P0158 in a Mitsubishi?
Common causes include a faulty oxygen sensor, damaged wiring, short circuits, or issues with the engine control module (ECM).
Can a bad oxygen sensor trigger code P0158?
Yes, a malfunctioning oxygen sensor can cause high voltage readings, leading to this code.
How can you diagnose code P0158 in a Mitsubishi?
You can inspect the wiring and connector for damage, check the oxygen sensor voltage with a multimeter, and use a scan tool to monitor live data.
Can driving with code P0158 damage the engine?
Prolonged driving with this code may lead to poor performance and increased emissions, potentially damaging the catalytic converter over time.
How do you fix code P0158 in a Mitsubishi?
Repairs may include replacing the oxygen sensor, repairing wiring, or addressing ECM issues if necessary.
How much does it cost to repair code P0158 in a Mitsubishi?
Depending on the issue, repairs may cost $150–$450, with oxygen sensor replacement being the most common fix.
Can a dirty or contaminated sensor cause code P0158?
Yes, contamination from oil or coolant leaks can affect sensor performance and trigger this code.
Should the oxygen sensor be replaced immediately after code P0158 appears?
Not necessarily; perform a proper diagnosis to ensure the sensor is the issue before replacing it.
Discuss the causes and fixes for P0158 Mitsubishi OBDII Code
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