P0140 GMC Code - O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2
Quick Answer
The P0140 diagnostic trouble code (DTC) for GMC vehicles indicates that there is no activity detected from the oxygen sensor in Bank 1 Sensor 2. Common causes include Faulty oxygen sensor, Wiring or connector issues, Exhaust leaks near the sensor. 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
- P0140 GMC indicates O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty oxygen sensor, Wiring or connector issues, Exhaust leaks near the sensor.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0140 GMC Description
The P0140 diagnostic trouble code (DTC) for GMC vehicles indicates that there is no activity detected from the oxygen sensor in Bank 1 Sensor 2. This sensor is located downstream of the catalytic converter and is responsible for monitoring the efficiency of the catalytic converter, helping to regulate fuel mixture and emissions. When the sensor fails to detect any activity, it can lead to issues with the vehicle's fuel efficiency, emissions, and overall performance.
Common Causes of P0140 GMC
- Faulty oxygen sensor
- Wiring or connector issues
- Exhaust leaks near the sensor
- Catalytic converter failure
- Engine running rich or lean
Symptoms of P0140 GMC
- Decreased fuel efficiency
- Rough idling or stalling
- Engine misfires
- Increased emissions
- Check engine light illuminated on the dashboard
How to Fix P0140 GMC
- Use an OBD-II scanner to confirm the P0140 code and pinpoint the issue
- Inspect the wiring and connectors for any damage or corrosion
- Test the oxygen sensor using a multimeter to check for proper function
- Replace the oxygen sensor if it is faulty
- Clear the DTC and monitor for any recurring issues
Cost to Fix P0140 GMC
The cost of repairing a P0140 DTC can vary depending on the specific cause of the issue. Generally, replacing an oxygen sensor can range from $100 to $300, including parts and labor. However, if additional components such as the catalytic converter need to be replaced, the cost can increase significantly. It is recommended to consult with a professional mechanic to get an accurate estimate based on your vehicle's make and model.
Tech Notes for P0140 GMC
When is the Code Detected?
Need more information about the P0140 GMC code?
Need more information on how to fix the P0140 GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0140 GMC code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0140 GMC Code
No Frequently Asked Questions about P0140 GMC Code found.
Discuss the causes and fixes for P0140 GMC OBDII Code
-
I replaced the bank 1 sensor 2 oxygen sensor. Erased the codes and then drove for 30 minutes. The next time I drove the truck the same code came back. any thoughts on how to trouble shoot for the next possible cause?
-
At this point you probably need to have a shop with a scanner monitor the sensor. If there is no signal from the sensor then you need to check the wires from the sensor to the Powertrain Control Module.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.