P2238 Code - O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1
Quick Answer
The Front Oxygen Sensor (O2 Sensor 1) is placed into the exhaust manifold. Common causes include Faulty Front Heated Oxygen Sensor Bank 1, Front Heated Oxygen Sensor Bank 1 harness is open or shorted, Front 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
- P2238 indicates O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1.
- Common causes
- Common causes include Faulty Front Heated Oxygen Sensor Bank 1, Front Heated Oxygen Sensor Bank 1 harness is open or shorted, Front 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 P2238 Description
What are the Possible Causes of the DTC P2238?
- Faulty Front Heated Oxygen Sensor Bank 1
- Front Heated Oxygen Sensor Bank 1 harness is open or shorted
- Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
How to Fix the DTC P2238?
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 P2238 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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Get the P2238 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P2238 Acura — Air/Fuel Ratio Sensor 1 Bank 1 Circuit Low Voltage
- P2238 Dodge — O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1
- P2238 Ford — O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1
- P2238 Honda — Air/Fuel Ratio Sensor 1 Bank 1 Circuit Low Voltage
- P2238 Hyundai — O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1
- P2238 Lexus — A/F Sensor Pumping Current Circuit Low Bank 1 Sensor 1
- P2238 Lincoln — O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1
- P2238 Mercury — O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1
- P2238 Scion — A/F Sensor Bank 1 Short Circuit
- P2238 Toyota — A/F Sensor Bank 1 Short Circuit
Frequently Asked Questions about P2238 Code
1. What are the common symptoms of OBDII code P2238?
- Common symptoms of code P2238 include poor fuel economy, rough idling, engine misfires, and the illumination of the check engine light.
2. What does OBDII code P2238 indicate about the O2 sensor?
- OBDII code P2238 indicates that there is a low voltage signal in the positive current control circuit of the Bank 1 Sensor 1 O2 sensor.
3. What are the possible causes of OBDII code P2238?
- Potential causes of code P2238 include a faulty O2 sensor, damaged wiring or connectors in the O2 sensor circuit, exhaust leaks, or issues with the engine control module.
4. How can I diagnose the O2 sensor positive current control circuit low condition?
- To diagnose code P2238, you can use a scan tool to read the trouble codes, visually inspect the O2 sensor and its wiring, perform voltage tests, and check for exhaust leaks.
5. Can I drive my vehicle with OBDII code P2238?
- It is not recommended to drive your vehicle with OBDII code P2238, as it can lead to decreased fuel efficiency and potentially cause damage to the engine over time.
6. How can I repair OBDII code P2238?
- Repairing code P2238 may involve replacing the Bank 1 Sensor 1 O2 sensor, repairing damaged wiring or connectors, fixing exhaust leaks, or reprogramming the engine control module.
7. Is it possible to reset OBDII code P2238 without fixing the underlying issue?
- While you can clear the code with a scan tool, it is important to address the root cause of code P2238 to prevent further issues and ensure proper vehicle performance.
8. Will OBDII code P2238 cause my vehicle to fail an emissions test?
- Yes, OBDII code P2238 can cause your vehicle to fail an emissions test due to the impact it has on the O2 sensor's ability to accurately monitor and adjust the air-fuel mixture.
9. Can a DIY enthusiast fix OBDII code P2238 themselves?
- Depending on your skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair OBDII code P2238 by following proper diagnostic procedures and using the right replacement parts.
10. How long does it typically take to repair OBDII code P2238?
- The time to repair code P2238 can vary based on the specific cause and complexity of the issue. It may take anywhere from a few hours to a full day, depending on the extent of the repairs needed.
Discuss the causes and fixes for P2238 OBDII Code
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I had a p2238 code and check engine light event. Garage changed oxygen sensor but check engine light stayed on. Computer showed that both sensors were working correctly but cel stayed on. Garage thinks changing sensor again might fix it? Mechanic showed me that the current from sensor to ECM was reduced. Some others suggested that it maybe a harness problem such as a cracked or broken wire between the ECM and the sensor. Now trying to find an auto electric specialist to disconnect the harness from the ECM and verify wiring integrity. Any suggestions?
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There are 2 things I have seen that could cause the same problem, damage new sensor and exhaust leaks. Unless your Camry was in accident, harness problems are not that common, besides the code is for a short circuit and not open circuit. The new sensors your garage installed should have warranty.
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Thanks, I'm checking into faulty sensor and or wire integrity, sadly at a new garage as the old one just wants to sell me a new more expensive sensor without warranting the new non functioning ones. If this doesn't resolve the matter the exhaust leak is a good tip, thanks for it
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