Service bulletins for the 2018 Toyota Corolla
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
183 on file from NHTSA, as of 2026-10-19.
About P0171 on the 2018 Toyota Corolla: what the code means, and the bulletins and recalls about the same components.
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By component
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Only bulletins with trouble code: P0171 are shown. Show all
| TSB000923 | 2023-05-01. Service bulletin. EQUIPMENT; SERVICE BRAKES, HYDRAULIC. TSB: Some 2014 ? 2020 model year Toyota vehicles may exhibit a hard start and/or MIL ON condition with one or more of the following Diagnostic Trouble Codes (DTCs): ?DTC P0171 and/or P0174 (System Too Lean Bank 1/Bank 2) ?DTC P0087 Fuel Rail / System Pressure ? Too Low Techstream data list analysis may reveal positive fuel trims including a no pressure condition verified by a manual fuel pressure gauge. Follow the Repair Procedure in this bulletin to address these conditions. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.