P1159 GMC Code - HO2S Cross Counts Bank 2 Sensor 2
Quick Answer
The P1159 GMC code specifically refers to an issue with the HO2S (Heated Oxygen Sensor) cross counts on Bank 2 Sensor 2. Common causes include Faulty HO2S Bank 2 Sensor 2, Wiring issues or connections to the sensor, Vacuum leaks in the intake system. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1159 GMC indicates HO2S Cross Counts Bank 2 Sensor 2.
- Common causes
- Common causes include Faulty HO2S Bank 2 Sensor 2, Wiring issues or connections to the sensor, Vacuum leaks in the intake system.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1159 GMC Description
The P1159 GMC code specifically refers to an issue with the HO2S (Heated Oxygen Sensor) cross counts on Bank 2 Sensor 2. The HO2S is responsible for measuring the oxygen content in the exhaust gases leaving the engine. Bank 2 Sensor 2 is located on the side of the engine where the number 2 cylinder is located, and it is the sensor located after the catalytic converter.
Common Causes of P1159 GMC
- Faulty HO2S Bank 2 Sensor 2
- Wiring issues or connections to the sensor
- Vacuum leaks in the intake system
- Exhaust leaks near the sensor
- Issues with the catalytic converter on Bank 2
Symptoms of P1159 GMC
- Decreased fuel efficiency
- Rough idling or stalling
- Hesitation on acceleration
- Check Engine Light illuminated
- Decreased overall engine performance
How to Fix P1159 GMC
- Begin by visually inspecting the wiring and connections to the HO2S Bank 2 Sensor 2. Look for any signs of damage, corrosion, or loose connections.
- Use a scan tool to monitor the sensor's readings while the engine is running. Compare the data to the manufacturer's specifications to determine if the sensor is functioning properly.
- If the sensor is faulty, replace it with a new, OEM-quality sensor. Make sure to follow the manufacturer's recommendations for installation and calibration.
- Check for any vacuum leaks in the intake system or exhaust leaks near the sensor. Repair any leaks found to ensure proper sensor operation.
- Clear the code from the ECM's memory using a scan tool and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P1159 GMC
The cost of repairing a P1159 GMC code can vary depending on the specific cause of the issue. On average, the cost of a new HO2S sensor can range from $50 to $200, depending on the vehicle make and model. Labor costs can range from $100 to $300, depending on the shop's hourly rates and the complexity of the repair. Overall, the total cost of repairing this issue could range from $150 to $500. It's important to note that these are rough estimates, and actual costs may vary based on the factors mentioned above.
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