P1138 Saturn Code - HO2S Bank 1 Sensor 2 Rich or High Voltage
Quick Answer
In order to control emissions, a catalytic converter converts any harmful exhaust emissions into harmless water vapor and carbon dioxide. Common causes include Faulty HO2S Bank 1 Sensor 2, HO2S Bank 1 Sensor 2 harness is open or shorted, HO2S Bank 1 Sensor 2 circuit 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
- P1138 Saturn indicates HO2S Bank 1 Sensor 2 Rich or High Voltage.
- Common causes
- Common causes include Faulty HO2S Bank 1 Sensor 2, HO2S Bank 1 Sensor 2 harness is open or shorted, HO2S Bank 1 Sensor 2 circuit 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 P1138 Saturn Description
What are the Possible Causes of the DTC P1138 Saturn?
- Faulty HO2S Bank 1 Sensor 2
- HO2S Bank 1 Sensor 2 harness is open or shorted
- HO2S Bank 1 Sensor 2 circuit poor electrical connection
How to Fix the DTC P1138 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 P1138 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 P1138 Saturn Code
What does the OBDII code P1138 mean for a Saturn?
P1138 indicates that the downstream oxygen sensor (HO2S) on Bank 1 is detecting a consistently rich air-fuel mixture or a high voltage signal.
What are the symptoms of code P1138 on a Saturn?
Common symptoms include reduced fuel efficiency, increased emissions, poor engine performance, and the check engine light turning on.
What causes the P1138 code to appear?
Possible causes include a faulty downstream oxygen sensor (Bank 1 Sensor 2), wiring issues, exhaust leaks, fuel system problems, or a malfunctioning catalytic converter.
How can I diagnose a P1138 code on my Saturn?
Start by inspecting the oxygen sensor and its wiring for damage, checking for exhaust leaks, and verifying fuel system components like injectors and the fuel pressure regulator.
Can a faulty oxygen sensor cause the P1138 code?
Yes, a malfunctioning downstream oxygen sensor can send incorrect voltage readings, triggering the P1138 code.
What tools are needed to troubleshoot the P1138 code?
An OBDII scanner, a multimeter for testing wiring and sensors, and possibly a smoke tester for detecting exhaust leaks.
How do I fix the P1138 code on a Saturn?
Repairs may include replacing the downstream oxygen sensor, repairing damaged wiring, addressing exhaust leaks, or servicing the fuel system.
Can driving with a P1138 code damage my Saturn?
Prolonged driving with a P1138 code can lead to higher emissions and potentially damage the catalytic converter due to a rich air-fuel mixture.
How much does it cost to repair a P1138 code on a Saturn?
The cost depends on the repair needed. Replacing an oxygen sensor typically costs $100-$300, while fixing wiring or exhaust issues can vary widely.
Is it safe to clear the P1138 code without repairing the issue?
Clearing the code without addressing the root cause will likely result in the code returning and could lead to further engine or emissions problems.
Discuss the causes and fixes for P1138 Saturn OBDII Code
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