P1133 Audi Code - HO2S Heater Circuit- Bank 1 & 2 Sensor 1 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
- P1133 Audi indicates HO2S Heater Circuit- Bank 1 & 2 Sensor 1 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 P1133 Audi Description
What are the Possible Causes of the DTC P1133 Audi?
- Faulty O2 Sensor
- O2 Sensor harness is open or shorted
- O2 Sensor circuit poor electrical connection
How to Fix the DTC P1133 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 P1133 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 P1133 Audi Code
What does the OBDII code P1133 mean for an Audi?
The P1133 code indicates an electrical malfunction in the heater circuit of the oxygen sensor (HO2S) for Bank 1 and Bank 2, Sensor 1.
What are the symptoms of P1133 on an Audi?
Common symptoms include a check engine light, poor fuel efficiency, rough idling, and potentially reduced engine performance.
What causes the P1133 code to appear on an Audi?
Possible causes include a faulty oxygen sensor, damaged sensor wiring, blown fuse, poor electrical connection, or issues with the ECM.
Can I drive my Audi with the P1133 code active?
While the car may still run, driving with this code can lead to decreased fuel economy and potential damage to the catalytic converter over time.
How do I diagnose the P1133 code on my Audi?
Start by visually inspecting the wiring and connectors for damage. Use a multimeter to test the oxygen sensor’s heater circuit and verify the ECM’s functionality.
How do you fix the P1133 code on an Audi?
Repairs may include replacing the faulty oxygen sensor, repairing damaged wiring, checking and replacing blown fuses, or addressing ECM-related issues.
Is replacing the oxygen sensor the only solution for P1133?
Not always. The issue could stem from wiring or fuse problems, so a thorough diagnosis is necessary before replacing the sensor.
What is the role of the HO2S heater circuit in an Audi?
The heater circuit warms up the oxygen sensor to ensure accurate readings for air-fuel mixture adjustments, especially during cold starts.
How much does it cost to fix the P1133 code on an Audi?
The repair cost can vary widely, typically ranging from $100 to $300 for parts and labor, depending on whether the sensor or wiring needs replacement.
Can ignoring the P1133 code damage my Audi?
Yes, prolonged issues with the oxygen sensor can lead to incorrect air-fuel mixtures, reducing engine efficiency and potentially harming the catalytic converter.
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