P0137 Saturn Code - HO2S Circuit Low Voltage Bank 1 Sensor 2
Quick Answer
The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 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
- P0137 Saturn indicates HO2S Circuit Low Voltage Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 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 P0137 Saturn Description
The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the ECM to calculate the air-to-fuel ratio sooner.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the heated oxygen sensor is shorted to ground if the HO2S voltage is less than 50 mV.
What are the Possible Causes of the DTC P0137 Saturn?
- Faulty Rear Heated Oxygen Sensor Bank 1
- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Low or high fuel system pressure
- Fuel contamination
- Faulty fuel injectors
- Exhaust gas leaks
- Engine vacuum leaks
How to Fix the DTC P0137 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0137 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 P0137 Saturn Code
What does the OBDII code P0137 mean for a Saturn?
P0137 indicates a low voltage issue in the heated oxygen sensor (HO2S) circuit for Bank 1 Sensor 2, which monitors the catalytic converter's efficiency.
What are the common symptoms of code P0137 on a Saturn?
Symptoms may include poor fuel efficiency, a check engine light, rough idling, and potentially higher emissions during operation.
What causes the P0137 code on a Saturn?
Common causes include a faulty oxygen sensor, damaged wiring or connections, exhaust leaks, or an issue with the powertrain control module (PCM).
Can I drive my Saturn with a P0137 code?
While the vehicle may still be drivable, ignoring the code can lead to reduced fuel efficiency and potential damage to other components like the catalytic converter.
How do I fix the P0137 error code on my Saturn?
Repairs may include replacing the oxygen sensor, repairing damaged wiring, checking for exhaust leaks, and ensuring proper voltage at the sensor.
How can I test Bank 1 Sensor 2 for the P0137 code?
Use a multimeter to check for proper voltage and continuity in the wiring. Alternatively, use an OBDII scanner to monitor live sensor readings.
What tools do I need to diagnose P0137 on a Saturn?
An OBDII scanner, multimeter, and basic hand tools like a socket wrench are typically required for diagnostics and repair.
Is replacing the oxygen sensor guaranteed to fix code P0137?
Not always; the issue might be related to wiring, exhaust leaks, or PCM problems. Proper diagnosis is essential to identify the root cause.
How much does it cost to repair code P0137 on a Saturn?
Repair costs can range from $100 to $300 depending on whether the oxygen sensor, wiring, or other components need replacement.
Can a dirty or clogged catalytic converter trigger code P0137?
Yes, a damaged or inefficient catalytic converter can affect sensor readings and contribute to the P0137 code.
Discuss the causes and fixes for P0137 Saturn OBDII Code
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