AutoCodes – KIA – P0160 KIA

P0160 KIA Code - HO2S21 Circuit No Activity Detected

Quick Answer

The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Faulty Rear Heated Oxygen Sensor Bank 2, Rear Heated Oxygen Sensor Bank 2 harness is open or shorted, Rear Heated 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: P0160 KIA indicates HO2S21 Circuit No Activity Detected.
Common causes: Common causes include Faulty Rear Heated Oxygen Sensor Bank 2, Rear Heated Oxygen Sensor Bank 2 harness is open or shorted, Rear Heated 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 10,166

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0160 KIA Description

The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture (air-fuel ratio) must be maintained near the ideal stoichiometric ratio. The HO2S output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Engine Control Module (ECM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The ECM interprets Lean when the HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The ECM interprets Rich when the HO2S voltage is above 0.45 V.

OBDII Code P0160 KIA - HO2S21 Circuit No Activity Detected - AutoCodes.com — P0160 KIA Code - HO2S21 Circuit No Activity Detected

What does this mean?

What are the Possible Causes of the DTC P0160 KIA?

Faulty Rear Heated Oxygen Sensor Bank 2
Rear Heated Oxygen Sensor Bank 2 harness is open or shorted
Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors
Intake air leaks may be faulty
Exhaust gas leaks

How to Fix the DTC P0160 KIA?

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 does this mean?

Code Tech Notes

Replacing the Rear Heated Oxygen Sensor Bank 2 usually takes care of the problem

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0160 KIA 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 P0160 KIA code?

Need more information on how to fix the P0160 KIA code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0160 KIA code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0160 KIA Code

1. What are the common symptoms of OBDII code P0160 in a KIA vehicle?

- Common symptoms include poor fuel efficiency, rough idling, engine misfires, and the illumination of the Check Engine Light.

2. What does the OBDII code P0160 for a KIA mean?

- The code indicates that the oxygen sensor (HO2S21) in bank 2, sensor 1 circuit has not detected any activity.

3. What are the possible causes of HO2S21 Circuit No Activity Detected in a KIA?

- Potential causes include a faulty oxygen sensor, wiring issues, a blown fuse, or a problem with the engine control module (ECM).

4. How can I diagnose the HO2S21 Circuit No Activity Detected issue in my KIA?

- Diagnosis involves inspecting the oxygen sensor and its wiring, checking for voltage at the sensor, and scanning for related trouble codes in the ECM.

5. Can I drive my KIA with OBDII code P0160 present?

- It is not recommended to drive with this code present, as it can lead to decreased fuel efficiency and potentially cause damage to the engine over time.

6. How do I repair the HO2S21 Circuit No Activity Detected code in my KIA?

- Repair options may include replacing the oxygen sensor, repairing damaged wiring, replacing a blown fuse, or reprogramming the ECM.

7. Are there any DIY tips for fixing the P0160 code in my KIA?

- DIY tips include carefully inspecting the sensor and its wiring for visible damage, checking the fuse related to the oxygen sensor circuit, and ensuring proper connections.

8. Is it necessary to reset the Check Engine Light after fixing the P0160 code in my KIA?

- Yes, it is recommended to reset the Check Engine Light using an OBDII scanner after repairing the issue to clear the error code and monitor for any reoccurrence.

9. How much does it typically cost to repair the HO2S21 Circuit No Activity Detected issue in a KIA?

- The cost can vary depending on the root cause of the problem, but it may range from $100 to $300 for parts and labor.

10. Can a faulty oxygen sensor impact the overall performance of my KIA vehicle?

- Yes, a faulty oxygen sensor can lead to reduced fuel efficiency, engine misfires, and potentially cause harm to the catalytic converter if left unresolved.