P1135 Audi Code - HO2S Heater Circuit- Bank 1 & 2 Sensor 2 Electrical Malfunction
Quick Answer
A Heated Exhaust Oxygen (HO2S) sensor indicating rich at the end of a test is trying to correct for an over-lean condition. Common causes include Faulty O2 Sensor, O2 Sensor harness is open or shorted, O2 Sensor 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
- P1135 Audi indicates HO2S Heater Circuit- Bank 1 & 2 Sensor 2 Electrical Malfunction.
- Common causes
- Common causes include Faulty O2 Sensor, O2 Sensor harness is open or shorted, O2 Sensor 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 P1135 Audi Description
What are the Possible Causes of the DTC P1135 Audi?
- Faulty O2 Sensor
- O2 Sensor harness is open or shorted
- O2 Sensor circuit poor electrical connection
How to Fix the DTC P1135 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 P1135 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 P1135 Audi Code
What does the OBDII code P1135 mean for an Audi?
The P1135 code indicates a problem with the heater circuit of the oxygen sensor (HO2S) on Bank 1 or Bank 2, Sensor 2, due to an electrical malfunction.
What are the common symptoms of code P1135 in an Audi?
Symptoms may include poor fuel economy, rough idling, difficulty starting, increased emissions, and an illuminated check engine light.
What causes the P1135 code to appear on an Audi?
Common causes include a faulty oxygen sensor, damaged wiring or connectors, blown fuses, or issues with the vehicle’s powertrain control module (PCM).
Can a P1135 code affect vehicle performance?
Yes, it can lead to improper air-fuel ratio readings, causing reduced fuel efficiency and decreased engine performance.
How can I diagnose the P1135 code on my Audi?
Start by using an OBDII scanner to confirm the code, then inspect the oxygen sensor, heater circuit wiring, connectors, and fuses for damage or wear.
What is the role of the heater circuit in the oxygen sensor?
The heater circuit warms up the oxygen sensor quickly to ensure accurate air-fuel ratio readings during engine startup and operation.
Can I drive my Audi with a P1135 code?
While the vehicle may still be drivable, it is not recommended as the code can lead to increased emissions and further damage to the engine or exhaust system.
How do I fix the P1135 code on my Audi?
Repairs may involve replacing the faulty oxygen sensor, repairing damaged wiring or connectors, or checking and replacing blown fuses.
How much does it cost to repair a P1135 code on an Audi?
Repair costs vary but typically range from $150 to $400, depending on whether you replace the oxygen sensor or address wiring issues.
Do I need to reset the code after repairs?
Yes, use an OBDII scanner to clear the code after completing repairs and ensure the issue is resolved.
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