P0139 Chrysler Code - O2 sensor 1/2 Slow response
Quick Answer
The P0139 Chrysler code indicates that the oxygen sensor 1/2 in the exhaust system has a slow response time. 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
- P0139 Chrysler indicates O2 sensor 1/2 Slow response.
- 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.
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Code P0139 Chrysler Description
The P0139 Chrysler code indicates that the oxygen sensor 1/2 in the exhaust system has a slow response time. This sensor is responsible for monitoring the oxygen levels in the exhaust gases, which helps the engine control module (ECM) adjust the air-fuel mixture for optimal combustion. A slow response from the oxygen sensor can lead to inaccurate readings and affect the engine's performance and emissions.
Common Causes of P0139 Chrysler
- Faulty oxygen sensor
- Wiring or connector issues
- Exhaust leaks near the sensor
- Engine coolant leaks contaminating the sensor
- Exhaust system clogs or restrictions
Symptoms of P0139 Chrysler
- Decreased fuel efficiency
- Engine misfires
- Rough idling
- Poor acceleration
- Illumination of the Check Engine Light
How to Fix P0139 Chrysler
- Diagnose the issue by using a scan tool to monitor oxygen sensor data and visually inspecting the sensor and its connections.
- Replace the oxygen sensor if it is found to be faulty. Ensure to use an OEM or high-quality replacement sensor.
- Check and repair any damaged wiring or connectors leading to the oxygen sensor.
- Inspect the exhaust system for leaks or restrictions and address any issues found.
- Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0139 Chrysler
The cost of repairing a P0139 Chrysler code can vary depending on the specific cause of the issue. On average, replacing an oxygen sensor can cost between $150-$300 for parts and labor. Additional costs may apply if wiring repairs or exhaust system work is needed. It's recommended to consult a professional mechanic for an accurate diagnosis and cost estimate based on your vehicle's make and model.
Tech Notes for P0139 Chrysler
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Frequently Asked Questions about P0139 Chrysler Code
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Discuss the causes and fixes for P0139 Chrysler OBDII Code
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When I slow down for a red light, the speedometer flutters, the car slows down even more and my Park, Drive, neutral, Etc gauge blinks wavy lines and I have to reset the computer, then I could drive, until the next time. it also happens when I'm on the highway driving 65 mph. The car drops down to a much lower speed, revs high and I have to reset the computer
Can you help!!! Thanks -
The P0139 code is for the Oxygen Sensor, but a faulty Oxygen Sensor will not cause the type of symptoms you have. Unfortunately there are many things that could give you the symptoms you have.
Do you have any more codes?
If there are no other codes, my only recommendation is to start by replacing the spark plugs and air filter.
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