P1120 Volkswagen Code - HO2S Sensor Heater Circuit Open Bank 2 Sensor 1
Quick Answer
P1120 Volkswagen 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 Volkswagen 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 Volkswagen Description
What are the Possible Causes of the DTC P1120 Volkswagen?
- 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 Volkswagen?
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 Volkswagen 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 Volkswagen Code
1. What does the OBDII code P1120 mean for a Volkswagen?
P1120 indicates an issue with the HO2S (Heated Oxygen Sensor) heater circuit for Bank 2 Sensor 1, meaning the circuit is open or malfunctioning.
2. What are the common symptoms of code P1120 in a Volkswagen?
Symptoms may include a check engine light, decreased fuel efficiency, rough idling, and potentially higher emissions.
3. What causes the P1120 code to appear?
Common causes include a faulty oxygen sensor, damaged wiring or connectors in the heater circuit, or a malfunctioning ECM (Engine Control Module).
4. Where is Bank 2 Sensor 1 located in a Volkswagen?
Bank 2 Sensor 1 is located upstream (before the catalytic converter) on the side of the engine opposite Bank 1, typically on V-type engines.
5. Can a bad oxygen sensor trigger the P1120 code?
Yes, a faulty or failing oxygen sensor can prevent the heater from functioning correctly, triggering the P1120 code.
6. How is the P1120 code diagnosed in a Volkswagen?
A technician will use a scan tool to confirm the code, inspect the wiring and connectors, test the oxygen sensor heater resistance, and check for power and ground at the sensor.
7. Can I drive my Volkswagen with the P1120 code?
Driving with the P1120 code is not recommended, as it can lead to reduced engine performance, increased emissions, and potential damage to the catalytic converter.
8. How do I fix the P1120 code on my Volkswagen?
Repairs may involve replacing the oxygen sensor, repairing or replacing damaged wiring, or addressing issues with the ECM.
9. How much does it cost to repair the P1120 code in a Volkswagen?
Repair costs can vary but typically range from $150 to $400, depending on whether the oxygen sensor or wiring needs replacement.
10. Can a blown fuse cause the P1120 code to appear?
Yes, a blown fuse in the oxygen sensor heater circuit can cause the P1120 code, as it interrupts power to the sensor.
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