P2238 2013 Toyota RAV4 Code - A/F Sensor Bank 1 Short Circuit
Quick Answer
The Air Fuel Ratio (A/F) sensor generates a voltage that corresponds to the actual air-fuel ratio. Common causes include Faulty Air Fuel Ratio (A/F) Sensor Bank 1 Sensor 1, Air Fuel Ratio Sensor Bank 1 Sensor 1 harness is open or shorted, Air Fuel Ratio Sensor Bank 1 Sensor 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 2013 Toyota RAV4 indicates A/F Sensor Bank 1 Short Circuit.
- Common causes
- Common causes include Faulty Air Fuel Ratio (A/F) Sensor Bank 1 Sensor 1, Air Fuel Ratio Sensor Bank 1 Sensor 1 harness is open or shorted, Air Fuel Ratio Sensor Bank 1 Sensor 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 2013 Toyota RAV4 Description
The air-fuel ratio sensor is a planar type and is integrated with the heater, which heats the solid electrolyte (zirconia element). This heater is controlled by the ECM. When the intake air volume is low (the exhaust gas temperature is low), a current flows into the heater to heat the sensor, in order to facilitate accurate oxygen concentration detection. In addition, the sensor and heater portions are narrow types. The heat generated by the heater is conducted to the solid electrolyte through the alumina, and therefore sensor activation is accelerated.
In order to obtain a high purification rate of the carbon monoxide (CO), hydrocarbon (HC), and nitrogen oxide (NOx) components in the exhaust gas, a three-way catalytic converter is used. For the most efficient use of the three-way catalytic converter, the air-fuel ratio must be precisely controlled so that it is always close to the stoichiometric level.
The Diagnostic Trouble Code (DTC) is set when there is an open or short in the air-fuel ratio sensor circuit, or if the air-fuel ratio sensor output drops. To detect these problems, the voltage of the air-fuel ratio sensor is monitored when turning the ignition switch to ON, and the admittance (admittance is an electrical term that indicates the ease of flow of current) is checked while driving. If the voltage of the air-fuel ratio sensor is between 0.6 V and 4.5 V, it is considered normal. If the voltage is out of the specified range, or the admittance is less than the standard value, the ECM determines that there is a malfunction in the air-fuel ratio sensor. If the same malfunction is detected in the next driving cycle, the MIL is illuminated, and a DTC is stored.
What are the Possible Causes of the DTC P2238 2013 Toyota RAV4?
- Faulty Air Fuel Ratio (A/F) Sensor Bank 1 Sensor 1
- Air Fuel Ratio Sensor Bank 1 Sensor 1 harness is open or shorted
- Air Fuel Ratio Sensor Bank 1 Sensor 1 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P2238 2013 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 P2238 2013 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.
Need more information about the P2238 2013 Toyota RAV4 code?
Need more information on how to fix the P2238 2013 Toyota RAV4 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2238 2013 Toyota RAV4 code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P2238 2013 Toyota RAV4 Code
1. What does the OBDII code P2238 mean on a 2013 Toyota RAV4?
P2238 indicates a problem with the Air-Fuel (A/F) sensor in Bank 1, specifically a short circuit in the sensor's signal or reference circuit.
2. What are the symptoms of code P2238 in a 2013 Toyota RAV4?
Common symptoms include the check engine light illuminating, poor fuel economy, rough idling, hesitation during acceleration, and increased emissions.
3. What causes the P2238 code in a 2013 Toyota RAV4?
The most common causes are a faulty A/F sensor, damaged wiring or connectors, corrosion in the circuit, or a malfunctioning engine control module (ECM).
4. Is it safe to drive a 2013 Toyota RAV4 with a P2238 code?
While the car may still be drivable, continued use can result in poor performance, higher emissions, and potential damage to the catalytic converter.
5. How do you diagnose the P2238 code in a 2013 Toyota RAV4?
Diagnosis typically involves checking the A/F sensor wiring and connector for damage, testing the sensor itself, and verifying voltage and resistance values using a multimeter.
6. Can a bad oxygen sensor trigger the P2238 code?
Yes, a malfunctioning A/F sensor (a type of oxygen sensor) in Bank 1 can directly cause the P2238 code.
7. How do you fix the P2238 code on a 2013 Toyota RAV4?
Repairs may include replacing the A/F sensor, repairing or replacing damaged wiring or connectors, or, in rare cases, reprogramming or replacing the ECM.
8. How much does it cost to repair a P2238 code on a 2013 Toyota RAV4?
The cost can vary, but replacing the A/F sensor typically ranges from $200 to $400, including parts and labor. Wiring repairs or ECM replacement may cost more.
9. Can a dirty air filter cause the P2238 code?
No, a dirty air filter is unlikely to cause this specific code, as it primarily relates to a short circuit in the A/F sensor circuit.
10. Will clearing the P2238 code fix the issue in a 2013 Toyota RAV4?
Clearing the code will turn off the check engine light temporarily, but if the underlying issue isn’t resolved, the code will return.
Discuss the causes and fixes for P2238 2013 Toyota RAV4 OBDII Code
Code P2238 2013 Toyota RAV4 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
