P0038 2016 Toyota RAV4 Code - Oxygen Sensor Heater Control Circuit High Bank 1 Sensor 2
Quick Answer
The sensing portion of the heated oxygen sensor has a zirconia element which is used to detect the oxygen concentration in the exhaust gas. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2, Heated Oxygen Sensor Bank 1 Sensor 2 harness is open or shorted, Heated Oxygen Sensor Bank 1 Sensor 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
- P0038 2016 Toyota RAV4 indicates Oxygen Sensor Heater Control Circuit High Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2, Heated Oxygen Sensor Bank 1 Sensor 2 harness is open or shorted, Heated Oxygen Sensor Bank 1 Sensor 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 P0038 2016 Toyota RAV4 Description
The ECM monitors the current applied to the heated oxygen sensor heater to check the heater for malfunctions.
If the heater current is outside the normal range, the signal transmitted by the heated oxygen sensor becomes inaccurate. When the current in the heated oxygen sensor heater is outside the normal operating range, the ECM interprets this as a malfunction in the sensor heater and stores a Diagnostic Trouble Code (DTC).
What are the Possible Causes of the DTC P0038 2016 Toyota RAV4?
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2
- Heated Oxygen Sensor Bank 1 Sensor 2 harness is open or shorted
- Heated Oxygen Sensor Bank 1 Sensor 2 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0038 2016 Toyota RAV4?
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 P0038 2016 Toyota RAV4 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 P0038 2016 Toyota RAV4 Code
1. What does the OBDII code P0038 mean on a 2016 Toyota RAV4?
P0038 indicates an issue with the Oxygen Sensor Heater Control Circuit High on Bank 1 Sensor 2, meaning the heater circuit voltage is higher than expected.
2. What are the symptoms of the P0038 code in a 2016 Toyota RAV4?
Common symptoms include an illuminated check engine light, poor fuel efficiency, and increased emissions. However, you may not notice any drivability issues in some cases.
3. What causes the P0038 code to appear on a 2016 Toyota RAV4?
Potential causes include a faulty oxygen sensor heater, damaged wiring or connectors, a blown fuse, or a malfunctioning powertrain control module (PCM).
4. Can I drive my 2016 Toyota RAV4 with the P0038 code?
While it may be possible to drive, prolonged use with this code can lead to increased emissions and reduced fuel efficiency. It's best to address the issue promptly.
5. How do I fix the P0038 code on a 2016 Toyota RAV4?
Common fixes include replacing the Bank 1 Sensor 2 oxygen sensor, repairing damaged wiring, checking and replacing blown fuses, or addressing PCM issues if necessary.
6. Where is Bank 1 Sensor 2 located on a 2016 Toyota RAV4?
Bank 1 Sensor 2 is located downstream of the catalytic converter on the same side as cylinder 1.
7. How do I test the oxygen sensor heater circuit for the P0038 code?
You can use a multimeter to check the resistance of the sensor's heater circuit and inspect the wiring and connectors for damage or corrosion.
8. How much does it cost to fix the P0038 code on a 2016 Toyota RAV4?
Repair costs can vary, but replacing the oxygen sensor typically costs $150–$300, including parts and labor. Wiring repairs or PCM replacement may increase the cost.
9. Can a blown fuse cause the P0038 code on a 2016 Toyota RAV4?
Yes, a blown fuse in the oxygen sensor heater circuit can cause the P0038 code by interrupting power to the heater.
10. Do I need to reset the check engine light after fixing the P0038 code on a 2016 Toyota RAV4?
Yes, after completing the repair, you should clear the code with an OBDII scanner. If the issue is resolved, the check engine light will stay off.
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