P0139 Saturn Code - HO2S Slow Response Bank 1 Sensor 2
Quick Answer
The Powertrain Control Module (PCM) provides a .45 volt reference signal to the Heated Oxygen Sensor (HO2S) through the Bank 1 high signal circuit. Common causes include Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2, HO2S Bank 1 Sensor 2 harness is open or shorted, HO2S Bank 1 Sensor 2circuit poor electrical connection. 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
- P0139 Saturn indicates HO2S Slow Response Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2, HO2S Bank 1 Sensor 2 harness is open or shorted, HO2S Bank 1 Sensor 2circuit poor electrical connection.
- 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.
Code P0139 Saturn Description
What are the Possible Causes of the DTC P0139 Saturn?
- Faulty Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
- HO2S Bank 1 Sensor 2 harness is open or shorted
- HO2S Bank 1 Sensor 2circuit poor electrical connection
How to Fix the DTC P0139 Saturn?
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0139 Saturn 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 P0139 Saturn Code
1. What does the OBDII code P0139 mean on a Saturn?
P0139 indicates that the downstream oxygen sensor (Bank 1, Sensor 2) is responding slower than expected to changes in the air-fuel mixture.
2. What are the symptoms of a P0139 code on a Saturn?
Common symptoms include reduced fuel efficiency, a check engine light, rough idling, and sometimes increased emissions.
3. What causes the P0139 code on a Saturn?
Potential causes include a faulty oxygen sensor, exhaust leaks, wiring or connector issues, or a buildup of carbon deposits on the sensor.
4. Can I drive my Saturn with the P0139 code?
While your car may still be drivable, ignoring the code could lead to worsened fuel economy and potential damage to the catalytic converter over time.
5. How do I fix the P0139 code on a Saturn?
Common fixes include replacing the downstream oxygen sensor, repairing damaged wiring or connectors, and checking for exhaust leaks.
6. How do I diagnose the P0139 code on a Saturn?
Diagnosis typically involves scanning for additional codes, inspecting the oxygen sensor and its wiring, and testing the sensor's response time with a diagnostic tool.
7. How much does it cost to repair a P0139 code on a Saturn?
Replacing the oxygen sensor typically costs $150 to $300, depending on labor rates and the sensor's price.
8. Can a dirty oxygen sensor cause the P0139 code on a Saturn?
Yes, carbon buildup on the oxygen sensor can slow its response time and trigger the P0139 code.
9. What tools do I need to fix the P0139 code on a Saturn?
You’ll need an OBDII scanner, a socket set, and possibly a specialized oxygen sensor socket to replace the sensor.
10. Will resetting the check engine light fix the P0139 code on a Saturn?
Resetting the light may temporarily clear the code, but if the underlying issue isn’t addressed, the code will return.
Discuss the causes and fixes for P0139 Saturn OBDII Code
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