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Service bulletins for the 2014 Acura MDX

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.

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

About P0134 on the 2014 Acura MDX: what the code means, and the bulletins and recalls about the same components.

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By trouble code

Only bulletins with trouble code: P0134 are shown. Show all

Bulletins, newest first
DLR MSG - RFP -2018-03-05. Service bulletin. BACK OVER PREVENTION; EXTERIOR LIGHTING. Dealer message - American Honda (AHM) is investigating certain 2014 MDXs with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0154 (Front Air Fuel Ratio Sensor [Bank 2, Sensor 1] Heater System Malfunction) or P0134 (Rear Air Fuel Ratio Sensor [Bank 1, Sensor 1] Heater System Malfunction) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to your attempting any further repair of any kind.
DLR MSG - RFP -2018-03-05. Service bulletin. EXTERIOR LIGHTING; BACK OVER PREVENTION. Dealer message - American Honda (AHM) is investigating certain 2014 MDXs with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0154 (Front Air Fuel Ratio Sensor [Bank 2, Sensor 1] Heater System Malfunction) or P0134 (Rear Air Fuel Ratio Sensor [Bank 1, Sensor 1] Heater System Malfunction) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to your attempting any further repair of any kind.
DLR MSG - RFP -2018-02-26. Service bulletin. ELECTRICAL SYSTEM. Dealer message - American Honda (AHM) is investigating certain 2014 MDXs with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0154 (Front Air Fuel Ratio Sensor [Bank 2, Sensor 1]Heater System Malfunction) or P0134 (Rear Air Fuel Ratio Sensor [Bank 1, Sensor 1]Heater System Malfunction) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to your attempting any further repair of any kind.
DLR MSG - RFP -2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING. Dealer message - American Honda (AHM) is investigating certain 2014 MDXs & RLXs with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0154 (Front Air Fuel Ratio Sensor [Bank 2, Sensor 1]Heater System Malfunction) or P0134 (Rear Air Fuel Ratio Sensor [Bank 1, Sensor 1]Heater System Malfunction) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to your attempting any further repair of any kind.
DLR MSG - RFP -2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING. Dealer message - American Honda (AHM) is investigating certain 2014 MDXs & RLXs with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0154 (Front Air Fuel Ratio Sensor [Bank 2, Sensor 1]Heater System Malfunction) or P0134 (Rear Air Fuel Ratio Sensor [Bank 1, Sensor 1]Heater System Malfunction) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to your attempting any further repair of any kind.
DLR MSG - RFP -2017-12-08. Service bulletin. EXTERIOR LIGHTING. Dealer message - American Honda (AHM)is investigating certain 2014 MDXs & RLXs with a complaint of the Malfunction Indicator Lamp (MIL)on with the DTC P0154 (Front Air Fuel Ratio Sensor [Bank 2, Sensor 1]Heater System Malfunction)or P0134 (Rear Air Fuel Ratio Sensor [Bank 1, Sensor 1]Heater System Malfunction)stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to your attempting any further repair of any kind.
DLR MSG - RFP -2017-10-27. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Dealer message - American Honda (AHM) is investigating certain 2014-2015 MDXs & RLXs with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0154 (Front Air Fuel Ratio Sensor [Bank 2, Sensor 1] Heater System Malfunction) or P0134 (Rear Air Fuel Ratio Sensor [Bank 1, Sensor 1] Heater System Malfunction) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to your attempting any repair.
DLR MSG - RFP (R2017-10-15. Service bulletin. FUEL SYSTEM, GASOLINE. Dealer message - American Honda (AHM) is investigating certain 2014 MDXs & RLXs with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0154 (Front Air Fuel Ratio Sensor [Bank 2, Sensor 1] Heater System Malfunction) or P0134 (Rear Air Fuel Ratio Sensor [Bank 1, Sensor 1] Heater System Malfunction) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to your attempting any further repair of any kind.
DLR MSG - RFI -2017-09-29. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Dealer message - American Honda (AHM) is investigating certain 2014-2015MDXs with a complaint that the Malfunction Indicator Lamp (MIL) is on and DTC P0154 (Front Air Fuel Ratio Sensor [Bank 2, Sensor 1]Heater System Malfunction) or P0134 (Rear Air Fuel Ratio Sensor [Bank 1, Sensor 1]Heater System Malfunction) is stored. To fully understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to any repair.
DLR MSG - RFI -2017-09-27. Service bulletin. ELECTRICAL SYSTEM. Dealer message - American Honda (AHM) is investigating certain 2014-2015 MDXs with a complaint that the Malfunction Indicator Lamp (MIL) is on and DTC P0154 (Front Air Fuel Ratio Sensor [Bank 2, Sensor 1]Heater System Malfunction) or P0134 (Rear Air Fuel Ratio Sensor [Bank 1, Sensor 1]Heater System Malfunction) is stored. To fully understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to any repair.
DLR MSG - RFI -2017-08-25. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. Dealer message - American Honda (AHM) is investigating certain 2014-2015 MDX & RLXs with a complaint that the Malfunction Indicator Lamp (MIL) is on and DTC P0154 (Front Air Fuel Ratio Sensor [Bank 2, Sensor 1]Heater System Malfunction) or P0134 (Rear Air Fuel Ratio Sensor [Bank 1, Sensor 1]Heater System Malfunction) is stored. To fully understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to any repair.
DLR MSG - RFI -2017-08-25. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. Dealer message - American Honda (AHM) is investigating certain 2014-2015 MDX & RLXs with a complaint that the Malfunction Indicator Lamp (MIL) is on and DTC P0154 (Front Air Fuel Ratio Sensor [Bank 2, Sensor 1]Heater System Malfunction) or P0134 (Rear Air Fuel Ratio Sensor [Bank 1, Sensor 1]Heater System Malfunction) is stored. To fully understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to any repair.
DLR MSG - RFI -2017-08-25. Service bulletin. ELECTRICAL SYSTEM. Questionnaire for 2014-2015 MDX/RLX MIL On with DTC P0154 or P0134 Stored
DLR MSG - RFI -2017-08-25. Service bulletin. ELECTRICAL SYSTEM. Dealer message - American Honda (AHM) is investigating certain 2014-2015 MDX & RLXs with a complaint that the Malfunction Indicator Lamp (MIL) is on and DTC P0154 (Front Air Fuel Ratio Sensor [Bank 2, Sensor 1]Heater System Malfunction) or P0134 (Rear Air Fuel Ratio Sensor [Bank 1, Sensor 1]Heater System Malfunction) is stored. To fully understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to any repair.
DLR MSG - RFI -2017-08-15. Service bulletin. FUEL SYSTEM, OTHER. Dealer message - American Honda (AHM) is investigating certain 2014-2015 MDX & RLXs with a complaint that the Malfunction Indicator Lamp (MIL) is on and DTC P0154 (Front Air Fuel Ratio Sensor [Bank 2, Sensor 1]Heater System Malfunction) or P0134 (Rear Air Fuel Ratio Sensor [Bank 1, Sensor 1]Heater System Malfunction) is stored. To fully understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to any repair.
DLR MSG - RFI -2017-08-15. Service bulletin. ENGINE AND ENGINE COOLING. Dealer message - American Honda (AHM) is investigating certain 2014-2015 MDX & RLXs with a complaint that the Malfunction Indicator Lamp (MIL) is on and DTC P0154 (Front Air Fuel Ratio Sensor [Bank 2, Sensor 1] Heater System Malfunction) or P0134 (Rear Air Fuel Ratio Sensor [Bank 1, Sensor 1] Heater System Malfunction) is stored. To fully understand the cause of this condition, AHM would like to collect specific information from the vehicle prior to any repair.
Service Bulletin2017-07-31. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Service bulletin - The MIL comes on with DTC P0134 (rear A/F sensor [bank 1, sensor 1] heater system malfunction) and/or P0154 (front A/F sensor [bank 2, sensor 1] heater system malfunction). The PCM misinterprets the heater system input from the A/F sensor and sets DTC codes P0134 and/or P0154.

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