Service bulletins for the 2003 Toyota 4Runner
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.
245 on file from NHTSA, as of 2026-10-19.
About P0156 on the 2003 Toyota 4Runner: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: P0156 are shown. Show all
| 00505 | 2005-07-28. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. MALFUNCTION INDICATOR LAMP (MIL) ON WITH DIAGNOSTIC TROUBLE CODE (DTC) P0136 AND/OR P0156 (OXYGEN SENSOR CIRCUIT). *TT |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.