P0044 Subaru Code - HO2S13 Heater Control Circuit High
Quick Answer
Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 harness is open shorted, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 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
- P0044 Subaru indicates HO2S13 Heater Control Circuit High.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 harness is open shorted, Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 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 P0044 Subaru Description
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.
What are the Possible Causes of the DTC P0044 Subaru?
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 harness is open shorted
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 circuit poor electrical connection
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 3 fuse
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0044 Subaru?
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 P0044 Subaru 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 P0044 Subaru Code
1. What are the common symptoms of OBDII code P0044 in a Subaru related to HO2S13 heater control circuit high?
- Common symptoms include the Check Engine Light being illuminated, decreased fuel efficiency, rough idling, and potential engine stalling.
2. What are the possible causes of the HO2S13 heater control circuit high error code in a Subaru?
- The code P0044 in a Subaru can be triggered by issues such as a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or a problem with the engine control module (ECM).
3. How can I diagnose the OBDII code P0044 related to HO2S13 in my Subaru?
- Diagnosing this code typically involves using an OBDII scanner to retrieve the fault code, checking the oxygen sensor and related circuitry for damage, testing the wiring for continuity, and inspecting the ECM for any issues.
4. Is it safe to continue driving my Subaru with the OBDII code P0044 (HO2S13 heater control circuit high) present?
- It is not recommended to drive your Subaru with this code present as it can lead to further damage to the engine and emissions system, potentially causing more costly repairs in the future.
5. Can I repair the OBDII code P0044 in my Subaru on my own, or should I take it to a professional mechanic?
- While some DIY enthusiasts may be able to address this code by checking and replacing the oxygen sensor or related components, it is often best to consult a professional mechanic for an accurate diagnosis and repair.
6. Are there any quick fixes or temporary solutions for the OBDII code P0044 in my Subaru?
- Quick fixes like resetting the ECM by disconnecting the battery may temporarily clear the code, but it is important to address the root cause of the issue to prevent it from recurring.
7. How much does it typically cost to repair the OBDII code P0044 (HO2S13 heater control circuit high) in a Subaru?
- The cost of repairing this code can vary depending on the exact cause of the issue, but it may range from $100 to $500 or more, including parts and labor.
8. Will replacing the oxygen sensor fix the OBDII code P0044 in my Subaru?
- Replacing the oxygen sensor is a common solution for resolving the HO2S13 heater control circuit high code, but it is important to diagnose the issue accurately to ensure that this is the necessary repair.
9. How long does it typically take to repair the OBDII code P0044 in a Subaru?
- The repair time for this code can vary based on the complexity of the issue and the availability of parts. In general, it may take a few hours to a full day to diagnose and repair the problem.
10. Can the OBDII code P0044 in a Subaru reset itself, or does it require manual clearing after the repair?
- In some cases, the code may clear itself after the underlying issue is resolved. However, it is advisable to use an OBDII scanner to manually clear the code to ensure that the repair was successful.
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