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Service bulletins for the 2018 Honda Ridgeline

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.

113 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
A23-0782025-06-05. Service bulletin. ENGINE. Service Bulletin - Torque converters may not have been manufactured to proper specifications. As a result, the torque converter lock-up clutch cannot provide adequate holding force due to pressure bleeding down through a crack in the lock-up piston. The reduced lock-up clutch capacity results in the transmission indicator flashing “D” and set DTC P0741 Torque Converter Clutch Performance or Stuck OFF.
A23-0782025-06-05. Service bulletin. ENGINE. Service Bulletin - Torque converters may not have been manufactured to proper specifications. As a result, the torque converter lock-up clutch cannot provide adequate holding force due to pressure bleeding down through a crack in the lock-up piston. The reduced lock-up clutch capacity results in the transmission indicator flashing “D” and set DTC P0741 Torque Converter Clutch Performance or Stuck OFF.
A23-0782025-04-29. Service bulletin. ENGINE. Service Bulletin - Torque converters may not have been manufactured to proper specifications. As a result, the lock-up clutch cannot provide adequate holding force due to pressure bleeding down through a crack in the lock-up piston. The reduced lock-up clutch capacity results in the transmission indicator flashing “D” and set the DTC P0741 Torque Converter Clutch Performance or Stuck OFF.
AEBM041820259012025-04-29. Other. ENGINE. Dealer Message - Torque converters may not have been manufactured to proper specifications. As a result, the torque converter lock-up clutch cannot provide adequate holding force due to pressure bleeding down through a crack in the lock-up piston. The reduced lock-up clutch capacity results in the MIL not illuminating. “D” flashes and “Transmission Overheat” message appears setting DTC P0741 Torque Converter Clutch Circuit Performance or Stuck OFF.
A24-0852024-07-26. Service bulletin. ENGINE. Service Bulletin - MIL flashes and vehicle will not accelerate, low power. After cycling the ignition, the symptom does not return with no stored DTCs. This issue is more common in regions with cold weather (specifically near or below freezing temperatures). Usually after a long drive (around 2 hours) and accelerating while cornering.
A24-0852024-07-01. Service bulletin. ENGINE. Service Bulletin - The MIL flashes and vehicle will not accelerate, low power. After cycling the ignition, the symptom does not return with no stored DTCs. This issue is more common in regions with cold weather (specifically near or below freezing temperatures). Usually after a long drive (around 2 hours) and accelerating while cornering. Moisture accumulation in the intake manifold during long drives gets drawn into the combustion chamber while cornering, causing misfires.
A23-0782023-09-06. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER; ENGINE AND ENGINE COOLING. Service Bulletin - Torque converters may not have been manufactured to proper specifications. As a result, the torque converter lock-up clutch cannot provide adequate holding force due to pressure bleeding down through a crack in the lock-up piston. The reduced lock-up clutch capacity results in DTC P0741 Torque Converter Clutch Circuit Performance or Stuck OFF.
ABOM083120239012023-09-06. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Dealer Message - Torque converters may not have been manufactured to proper specifications. As a result, the torque converter lock-up clutch cannot provide adequate holding force due to pressure bleeding down through a crack in the lock-up piston. The reduced lock-up clutch capacity results in the MIL illuminating and set DTC P0741 Torque Converter Clutch Circuit Performance or Stuck OFF.
ATI&020720239052023-02-15. Service bulletin. ENGINE AND ENGINE COOLING. Dealer Message- American Honda Motor Co., Inc. (AHM) is searching for certain 2017-2018 Odyssey, Pilot, Ridgeline with a customer complaint of the vehicle running rough or in low power mode with the Malfunction Indicator Light (MIL) on with one or more of the DTC listed below (in Qualifiers) stored. 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.
ATI&011920232023-01-25. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017-2018 Odyssey, Pilot, Ridgeline with a customer complaint of the vehicle running rough or in low power mode with the Malfunction Indicator Light (MIL) on with one or more of the DTC listed below (in Qualifiers) stored. 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.
A20-0022022-09-09. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. Service bulletin - The MIL is on with DTC P2422 (EVAP canister vent shut valve stuck closed malfunction). Dirt may be clogging the EVAP canister vent tube.
A20-0022022-08-02. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING. Service bulletin - The MIL is on with DTC P2422 (EVAP canister vent shut valve stuck closed malfunction). Dirt may be clogging the EVAP canister vent tube.
APaS042220219052021-04-27. Service bulletin. ENGINE AND ENGINE COOLING. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2018-2020 Odysseys, Passports, Pilots & Ridgelines with a customer complaint of the Malfunction Indicator Light (MIL) on with the DTC P0441 (EVAP System Purge Flow Malfunction) stored. 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.
ONLN94032920212021-04-06. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY. "Owner Notification Letter - On some 2017-19 Pilot, 2017-19 Ridgeline, and 2018-19 Odyssey models, the malfunction indicator light (MIL) may come on if one or more of the following diagnostic trouble codes (DTCs) are stored: - P0420 (rear bank catalyst system efficiency below threshold [bank 1]) - P0430 (front bank catalyst system efficiency below threshold [bank 2]) - P0300-P0306 (misfire) - P219A (air-fuel ratio variation of cylinder [bank 1, rear bank]) - P219B (air-fuel ratio variation of cylinder [bank 2, front bank]) American Honda is extending the warranty on the fuel injectors to 10 years from the original date of purchase or 150,000 miles, whichever comes first. This warranty extension provides coverage for the original owner and any subsequent owners. No action is required on your part unless you experience a problem."
A21-0102021-02-18. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE AND ENGINE COOLING. "Service Bulletin - The PCM software may misinterpret sensor inputs as a deteriorated catalytic converter. Additionally, debris from the high pressure pump or the fuel injector machining process can cause internal wear or clogging inside one or more injectors. One or more of the following DTCs may be stored: - P0420 (rear bank catalyst system efficiency below threshold [bank 1]) - P0430 (front bank catalyst system efficiency below threshold [bank 2]) - P0300-P0306 (misfire) - P219A (air-fuel ratio variation of cylinder [bank 1, rear bank]) - P219B (air-fuel ratio variation of cylinder [bank 2, front bank]) American Honda is extending the warranty on these repairs to 10 years from the original date of purchase or 150,000 miles, whichever comes first."
A19-0732021-02-18. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ENGINE AND ENGINE COOLING. Service Bulletin - MIL Comes On with DTC P0430 or P0430 with P030X, P219A, P219B (Without Software Update)
A18-0252021-02-18. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. Service Bulletin - MIL Comes On with DTC P0300-P0306 or P219A/B
A18-0252020-12-02. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. Service Bulletin - The MIL comes on with DTC P0300 (random misfire detected), and/or P0301-P0306 (cylinder misfire detected), or P219A/B (air-fuel ratio variation of cylinder [bank 1, rear bank/bank 2, front bank]).
A16-0542020-10-29. Service bulletin. ENGINE AND ENGINE COOLING. Service Bulletin - The timing belt area makes a chirping noise after the engine warms up.
A20-0682020-10-14. Service bulletin. ENGINE AND ENGINE COOLING. Service Bulletin - You hear a chirping in the cabin with the engine running, the transmission in Drive, and the engine at operating temperature.
A16-0132019-11-26. Service bulletin. ENGINE; FUEL SYSTEM, GASOLINE. Service Bulletin - There is a chirping coming from the engine area with the engine warmed up. The high pressure fuel pump is making a chirp.
APaS090920199042019-09-18. Service bulletin. FUEL SYSTEM, GASOLINE; ENGINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2018-2019 Odysseys, Pilots & Ridgelines with a customer complaint of a chirp noise heard inside cabin or coming from the engine compartment. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
A19-0732019-08-13. Service bulletin. ENGINE AND ENGINE COOLING. "Service Bulletin - The MIL comes on with DTC P0430 (front bank catalyst system efficiency below threshold [bank 2]). Additionally, one or more of the following DTCs may be stored: -P030X (misfire) -P219A (air-fuel ratio variation of cylinder [bank 1, rear bank]) -P219B (air-fuel ratio variation of cylinder [bank 2, front bank])"
A19-0732019-07-26. Service bulletin. ENGINE AND ENGINE COOLING. "Service Bulletin - The MIL comes on with DTC P0430 (front bank catalyst system efficiency below threshold [bank 2]). Additionally, one or more of the following DTCs may be stored: -P030X (misfire) -P219A (air-fuel ratio variation of cylinder [bank 1, rear bank]) -P219B (air-fuel ratio variation of cylinder [bank 2, front bank])"
A19-0732019-07-11. Service bulletin. ENGINE AND ENGINE COOLING. "The MIL comes on with DTC P0430 (front bank catalyst system efficiency below threshold [bank 2]). Additionally, one or more of the following DTCs may be stored: - P030X (misfire) - P219A (air-fuel ratio variation of cylinder [bank 1, rear bank]) - P219B (air-fuel ratio variation of cylinder [bank 2, front bank])"

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.