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OBD code information sheet

https://obdauto.ro/cod/P1170/BUICK?lang=en

P1170

Bank To Bank Fuel Trim Offset

Attention levelRisk not classifiedDepends on symptoms

No verified severity assessment is available for this code yet. The code alone cannot determine whether driving is safe; check warnings, noises, temperatures and vehicle behaviour.

System groupEngine & powertrain
Selected definitionBuick13 definitions availableChange

Choose the make reported by the scan tool or vehicle documentation. The same code can have different manufacturer meanings.

BuickCadillacChevroletChryslerFordGMGMCKiaLincolnMazdaMercuryOldsmobileManufacturer unspecified in sourceSaturn

Technical explanation

Bank To Bank Fuel Trim Offset. Source catalogue definition; confirm applicability using vehicle service information.

Mixture regulation

General system guidance · not a confirmed diagnosis

Investigate rich/lean operation through corrections, air, fuel and exhaust sensing, not immediate oxygen-sensor replacement.

The association is based on the imported description. This information explains the system; it does not confirm a procedure for the exact code, model or engine. Verify applicability in manufacturer documentation.

Manufacturer-specific definition: verify its meaning and subtype with a compatible tool before using this general guide.

Checks for this type of system

  1. Compare trims at idle and permitted load.
  2. Check intake, supply and possible leaks ahead of the sensor.
  3. Address associated electrical faults first.

Useful diagnostic data, where available

  • Short/long-term trims where supported.
  • Airflow, pressure and suitable oxygen-sensor response.

Normal values and thresholds vary by vehicle and are not assumed here.

Mistakes to avoid

  • P0171/P0172 alone does not condemn an oxygen sensor.
  • Do not transfer reference values between engines.
System-guide sources

References support general principles, not individual verification of every associated code.

Vehicle associations in the catalogue

Catalogue associations help searching and do not confirm code applicability for every model, year and engine combination. Check the vehicle service information.

Make

Buick

Continue your research

Links to related systems, warning lights and vehicle examples.

Check Engine light: meaning and urgencyRead the code with an OBD scanner

Experiences with this code

User-reported cases published after moderation. Approval does not verify the diagnosis; the same code can have different causes.

No approved English experiences for this definition yet.

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