P1177 Code - O2 Correction Behind Catalyst B1 Limit Attained
Quick Answer
P1177 indicates O2 Correction Behind Catalyst B1 Limit Attained. Common causes include Faulty O2 Sensor, Faulty Failed MAF Sensor, Vacuum leak on engine. 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
- P1177 indicates O2 Correction Behind Catalyst B1 Limit Attained.
- Common causes
- Common causes include Faulty O2 Sensor, Faulty Failed MAF Sensor, Vacuum leak on engine.
- 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 P1177 Description
What are the Possible Causes of the DTC P1177?
- Faulty O2 Sensor
- Faulty Failed MAF Sensor
- Vacuum leak on engine
- Lean Air/Fuel ratio
How to Fix the DTC P1177?
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 P1177 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 P1177 code?
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Need Help with the Code?
Get the P1177 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P1177 Audi — O2 Correction Behind Catalyst B1 Limit Attained
- P1177 BMW — O2 Sensor Slow Response Bank 2
- P1177 Ford — Synchronization Fault
- P1177 Hyundai — Electronic Throttle Body Motor Open/Short #2
- P1177 MINI — O2 Sensor Slow Response Bank 2
- P1177 Volkswagen — O2 Correction Behind Catalyst B1 Limit Attained
Frequently Asked Questions about P1177 Code
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