P2249 Code - O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1
Quick Answer
The Front Oxygen Sensor (O2 Sensor 1) is placed into the exhaust manifold. Common causes include Faulty Front Oxygen Sensor Bank 2, Front Oxygen Sensor Bank 2 harness is open or shorted, Front Oxygen Sensor Bank 2 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
- P2249 indicates O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1.
- Common causes
- Common causes include Faulty Front Oxygen Sensor Bank 2, Front Oxygen Sensor Bank 2 harness is open or shorted, Front Oxygen Sensor Bank 2 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 P2249 Description
What are the Possible Causes of the DTC P2249?
- Faulty Front Oxygen Sensor Bank 2
- Front Oxygen Sensor Bank 2 harness is open or shorted
- Front Oxygen Sensor Bank 2 circuit poor electrical connection
How to Fix the DTC P2249?
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 P2249 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.
Need more information about the P2249 code?
Need more information on how to fix the P2249 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2249 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P2249 Acura — O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1
- P2249 Dodge — O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1
- P2249 Ford — O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1
- P2249 Honda — O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1
- P2249 Hyundai — O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1
- P2249 KIA — O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1
- P2249 Lincoln — O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1
- P2249 Mercury — O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1
Frequently Asked Questions about P2249 Code
What does the OBDII code P2249 mean?
P2249 indicates a low voltage issue in the oxygen sensor reference voltage circuit for Bank 2, Sensor 1.
What are the common symptoms of code P2249?
Common symptoms include reduced fuel efficiency, poor engine performance, rough idling, and possibly an illuminated Check Engine Light.
What causes the P2249 code to be triggered?
Causes can include a faulty oxygen sensor, damaged wiring or connectors, a malfunctioning PCM, or a short circuit in the reference voltage circuit.
Which sensor is affected by the P2249 code?
The code refers to the upstream oxygen sensor (Sensor 1) on Bank 2, which is the side of the engine opposite Cylinder 1.
Can I drive my car with the P2249 code?
Driving with this code is not recommended, as it may lead to poor engine performance and potentially cause damage to other components over time.
How do I diagnose the P2249 code?
Diagnosing this code typically involves inspecting the oxygen sensor, checking for damaged wiring or connectors, and verifying the reference voltage with a multimeter.
How do I fix the P2249 code?
Repairs may include replacing the oxygen sensor, repairing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.
What tools are needed to troubleshoot the P2249 code?
You’ll need an OBDII scanner, a digital multimeter, and possibly a wiring diagram for your vehicle to troubleshoot this issue.
How much does it cost to fix the P2249 code?
Repair costs vary but typically range from $100 to $300 for parts and labor, depending on whether the oxygen sensor or wiring needs replacement.
Can a dirty air filter cause the P2249 code?
A dirty air filter is unlikely to directly cause this code, as it specifically relates to the oxygen sensor's reference voltage circuit.
Discuss the causes and fixes for P2249 OBDII Code
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