Service bulletins for the 2018 Honda Civic
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.
236 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
| A19-033 | 2019-04-21. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. Service Bulletin - Under certain circumstances, the vehicle may experience driveability issues, which may result in DTCs P0300 (random misfire detected), P0301 (No. 1 cylinder misfire detected), P0302 (No. 2 cylinder misfire detected), P0303 (No. 3 cylinder misfire detected), P0304 (No. 4 cylinder misfire detected), or P0172 (fuel system too rich) or a whirling noise coming from the engine compartment. |
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| A19-012 | 2019-04-21. Service bulletin. EQUIPMENT; EQUIPMENT:APPLIANCE:AIR CONDITIONER. Service Bulletin - This bulletin is replaced by S/B 19-033, Warranty Extension: 2016-18 Civic 1.5L: Software Update with A/C Control Unit Replacement; DTC P0300, P0301, P0302, P0303, P0304, or P0172; Whirling Noise from Engine. If you did Service Bulletin 19-012 on or before April 5th, 2019, use the Warranty Claim Information provided below. |
| APaS03202019903 | 2019-03-26. Service bulletin. ENGINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018-2019 Civic 2.0Ls with a customer complaint of an oil leak. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind. |
| A19-027 | 2019-03-14. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:APPLIANCE:AIR CONDITIONER. Service Bulletin - Under certain circumstances, the vehicle may experience driveability issues, which may result in DTCs P0300 (random misfire detected), P0301 (No. 1 cylinder misfire detected), P0302 (No. 2 cylinder misfire detected), P0303 (No. 3 cylinder misfire detected), P0304 (No. 4 cylinder misfire detected), or P0172 (fuel system too rich) to set. |
| A18-137 | 2019-03-14. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; ELECTRICAL SYSTEM. Service Bulletin - Under certain circumstances, the vehicle may experience driveability issues which may result in DTCs P0300 (random misfire detected), P0301 (No. 1 cylinder misfire detected), P0302 (No. 2 cylinder misfire detected), P0303 (No. 3 cylinder misfire detected), P0304 (No. 4 cylinder misfire detected), or P0172 (fuel system too rich). |
| AER19020B | 2019-03-05. Service bulletin. ENGINE. Engineering Request for Investigation - American Honda Motor Co., Inc. (AHM) is investigating certain 2018-2019 Civic 2.0Ls with a customer complaint of an oil leak. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind. |
| APaS02252019903 | 2019-03-05. Service bulletin. ENGINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018-2019 Civic 2.0Ls with a customer complaint of an oil leak. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind. |
| A19-012 | 2019-02-21. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Service Bulletin - Under certain circumstances, the vehicle may experience driveability issues which may result in DTCs P0300 (random misfire detected), P0301 (No. 1 cylinder misfire detected), P0302 (No. 2 cylinder misfire detected), P0303 (No. 3 cylinder misfire detected), P0304 (No. 4 cylinder misfire detected), or P0172 (fuel system too rich) or a whirling noise coming from the engine compartment. |
| A18-137 | 2019-02-19. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. "Service bulletin - Under certain circumstances, the vehicle may experience driveability issues which may result in DTCs P0300 (random misfire detected), P0301 (No. 1 cylinder misfire detected), P0302 (No. 2 cylinder misfire detected), P0303 (No. 3 cylinder misfire detected), P0304 (No. 4 cylinder misfire detected), or P0172 (fuel system too rich)." |
| ABOM01312019901 | 2019-02-10. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. "Dealer message - American Honda has previously announced product update campaigns for certain 2016-18 Civic and 2017-18 CR-V vehicles with the 1.5L turbo engine for engine oil dilution. Repair Update The AC control unit replacement procedure has been changed to a software reflash procedure. On February 1, 2019, revisions to service bulletins 18-114, 2017-18 CR-V Software Update and A/C Control Unit Update and 18-137, Product Update 2016-18 Civic Software and AC Control Unit Update, will be posted to the Service Information System (SIS) to reflect this change." |
| ASO01112019901 | 2019-02-10. Service bulletin. ENGINE AND ENGINE COOLING. "Dealer message - American Honda issued four service bulletins addressing drivability concerns that may cause DTC’s to set in affected vehicles." |
| A18-137 | 2019-02-10. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT:APPLIANCE:AIR CONDITIONER. "Service bulletin - Under certain circumstances, the vehicle may experience driveability issues which may result in DTCs P0300 (random misfire detected), P0301 (No. 1 cylinder misfire detected), P0302 (No. 2 cylinder misfire detected), P0303 (No. 3 cylinder misfire detected), P0304 (No. 4 cylinder misfire detected), or P0172 (fuel system too rich)." |
| APaS01022019901 | 2019-02-10. Service bulletin. ENGINE. Dealer message - American Honda (AHM) is investigating certain 2018 Accords & Civic Type-Rs with customer complaint of oil leak from the timing chain case cover. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind. |
| AHPa12212018901 | 2019-01-05. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; ENGINE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). "Dealer message - On December 5, 2018, American Honda announced a product update campaign for certain 2017-18 CR-V vehicles with the 1.5L turbo engine that were sold in 21 cold-weather states. Today, American Honda is expanding the scope of this product update to include certain 2016-18 Civic vehicles with the 1.5L turbo engine. This applies to vehicles in the same 21 states. This product update also addresses concerns related to engine oil dilution due to various control unit software/threshold settings." |
| A18-137_V2 | 2019-01-05. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:APPLIANCE:AIR CONDITIONER; ENGINE AND ENGINE COOLING; ENGINE. "Service bulletin - Under certain circumstances, the vehicle may experience driveability issues which may result in DTCs P0300 (random misfire detected), P0301 (No. 1 cylinder misfire detected), P0302 (No. 2 cylinder misfire detected), P0303 (No. 3 cylinder misfire detected), P0304 (No. 4 cylinder misfire detected), or P0172 (fuel system too rich)." |
| A18-137 | 2019-01-05. Service bulletin. ENGINE; EQUIPMENT:APPLIANCE:AIR CONDITIONER; ELECTRICAL SYSTEM:SOFTWARE. "Service bulletin - Under certain circumstances, the vehicle may experience driveability issues which may result in DTCs P0300 (random misfire detected), P0301 (No. 1 cylinder misfire detected), P0302 (No. 2 cylinder misfire detected), P0303 (No. 3 cylinder misfire detected), P0304 (No. 4 cylinder misfire detected), or P0172 (fuel system too rich)." |
| APaS11262018902 | 2018-12-07. Service bulletin. ENGINE. Dealer message - American Honda (AHM) is investigating certain 2018 Accords & Civic Type-Rs with customer complaint of oil leak from the timing chain case cover. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind. |
| AER18100A | 2018-12-04. Service bulletin. ENGINE. Engineering request for investigation - American Honda (AHM) is investigating certain 2018 Accords & Civic Type-Rs with customer complaint of oil leak from the timing chain case cover. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind. |
| APaS11132018901 | 2018-11-30. Service bulletin. ENGINE. Dealer message - American Honda (AHM) is investigating certain 2018 Accords & Civic Type-Rs with customer complaint of oil leak from the timing chain case cover. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind. |
| APaS10262018901 | 2018-11-13. Service bulletin. ENGINE AND ENGINE COOLING. Dealer message - American Honda (AHM) is investigating certain 2018 Accords & Civic Type-Rs with customer complaint of oil leak from the timing chain case cover. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind. |
| APaS10172018901 | 2018-10-29. Service bulletin. SUSPENSION. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018 Civics with a customer complaint of a noise coming from the front when going over a bump or turning. The noise can be described as clicking or knocking. To fully understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to you attempting a repair of any kind. |
| APaS10022018902 | 2018-10-15. Service bulletin. SUSPENSION:FRONT. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018 Civics with a customer complaint of a noise coming from the front when going over a bump or turning. The noise can be described as clicking or knocking. To fully understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to you attempting a repair of any kind. |
| APaS09172018903 | 2018-10-15. Service bulletin. STRUCTURE. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018 Civics with a customer complaint of a noise coming from the front when going over a bump or turning. The noise can be described as clicking or knocking. To fully understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to you attempting a repair of any kind. |
| AER18080A | 2018-10-01. Service bulletin. SUSPENSION:FRONT; EQUIPMENT; STRUCTURE; SUSPENSION. Engineering request for investigation - American Honda Motor Co., Inc. (AHM) is investigating certain 2018 Civics with a customer complaint of a noise coming from the front when going over a bump or turning. The noise can be described as clicking or knocking. To fully understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to you attempting a repair of any kind. |
| APaS08312018901 | 2018-09-17. Service bulletin. STRUCTURE. Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018 Civics with a customer complaint of a noise coming from the front when going over a bump or turning. The noise can be described as clicking or knocking. To fully understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to you attempting a repair of any kind. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.