P1120 Audi Code - HO2S Sensor Heater Circuit Open Bank 2 Sensor 1
Quick Answer
P1120 Audi indicates HO2S Sensor Heater Circuit Open Bank 2 Sensor 1. Common causes include Faulty HO2 Sensor Bank 2 Sensor 1, HO2 Sensor Bank 2 Sensor 1 harness is open or shorted, HO2 Sensor Bank 2 Sensor 1 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1120 Audi indicates HO2S Sensor Heater Circuit Open Bank 2 Sensor 1.
- Common causes
- Common causes include Faulty HO2 Sensor Bank 2 Sensor 1, HO2 Sensor Bank 2 Sensor 1 harness is open or shorted, HO2 Sensor Bank 2 Sensor 1 circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1120 Audi Description
What are the Possible Causes of the DTC P1120 Audi?
- Faulty HO2 Sensor Bank 2 Sensor 1
- HO2 Sensor Bank 2 Sensor 1 harness is open or shorted
- HO2 Sensor Bank 2 Sensor 1 circuit poor electrical connection
How to Fix the DTC P1120 Audi?
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 P1120 Audi 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 P1120 Audi Code
What does the OBDII code P1120 mean on an Audi?
P1120 on an Audi indicates an open circuit in the heater circuit of the Bank 2 Sensor 1 oxygen sensor (HO2S).
What are the symptoms of code P1120 on an Audi?
Symptoms include an illuminated check engine light, increased fuel consumption, poor engine performance, and possibly rough idling.
What causes the P1120 code in an Audi?
Common causes include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning engine control module (ECM).
How can I diagnose the P1120 code on my Audi?
Begin by checking the wiring and connectors near the Bank 2 Sensor 1 oxygen sensor for damage. Use a multimeter to test the sensor's heater circuit resistance.
Can I drive with the P1120 code active?
Driving with this code is not recommended, as it can lead to poor fuel efficiency and potential damage to the catalytic converter over time.
How do I fix the P1120 code on an Audi?
Repairs may include replacing the oxygen sensor, repairing damaged wiring, or addressing issues with the ECM if necessary.
Where is Bank 2 Sensor 1 located on an Audi?
Bank 2 Sensor 1 is located on the exhaust system of the engine's Bank 2, upstream of the catalytic converter.
What does the heater circuit in the oxygen sensor do?
The heater circuit warms up the oxygen sensor quickly to ensure accurate readings and efficient engine operation during cold starts.
How much does it cost to fix the P1120 code on an Audi?
The cost can range from $100 to $400 depending on whether the issue is with the oxygen sensor itself or the wiring.
Can a dirty air filter cause the P1120 code?
No, a dirty air filter is unlikely to trigger this specific code, as it relates to the oxygen sensor’s heater circuit.
Discuss the causes and fixes for P1120 Audi OBDII Code
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