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 P0138 on the 2014 Acura MDX: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
Only bulletins with trouble code: P0138 are shown. Show all
| DLR MSG - RFP - | 2018-06-18. Service bulletin. ELECTRICAL SYSTEM; ENGINE. Dealer message - American Honda (AHM) is investigating certain 2014 MDXs with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0158 (Front Secondary Heated Oxygen Sensor Circuit High Voltage) and/or P0138 (Rear Secondary Heated Oxygen Sensor Circuit High Voltage) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting any further repair of any kind. |
|---|---|
| DLR MSG - RFP - | 2018-03-05. Service bulletin. EQUIPMENT:ELECTRICAL. Dealer message - American Honda (AHM) is investigating certain 2014 MDXs with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0158 (Front Secondary Heated Oxygen Sensor Circuit High Voltage) and/or P0138 (Rear Secondary Heated Oxygen Sensor Circuit High Voltage) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting any further repair of any kind. |
| DLR MSG - RFP - | 2018-03-05. Service bulletin. EQUIPMENT:ELECTRICAL. Dealer message - American Honda (AHM) is investigating certain 2014 MDXs with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0158 (Front Secondary Heated Oxygen Sensor Circuit High Voltage) and/or P0138 (Rear Secondary Heated Oxygen Sensor Circuit High Voltage) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting any further repair of any kind. |
| ENG REQ - BER140 | 2018-03-05. Service bulletin. EQUIPMENT:ELECTRICAL. Engineering request for investigation - American Honda (AHM) is investigating certain 2014 MDXs with a complaint of the Malfunction Indicator Lamp (MIL) on with the DTC P0158 (Front Secondary Heated Oxygen Sensor Circuit High Voltage) and/or P0138 (Rear Secondary Heated Oxygen Sensor Circuit High Voltage) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you 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 P0158 (Front Secondary Heated Oxygen Sensor Circuit High Voltage) and/or P0138 (Rear Secondary Heated Oxygen Sensor Circuit High Voltage) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you 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 P0158 (Front Secondary Heated Oxygen Sensor Circuit High Voltage) and/or P0138 (Rear Secondary Heated Oxygen Sensor Circuit High Voltage) stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting any further repair of any kind. |
| IN-142702 | 2014-04-11. Service bulletin. ENGINE; EQUIPMENT. ACURA: AN INVESTIGATION ON DIAGNOSTIC TROUBLE CODES (DTC) P0158, P0138 (FRONT AND REAR SECONDARY HEATED OXYGEN SENSOR CIRCUIT HIGH VOLTAGE) SHOWING WHEN MALFUNCTION INDICATOR LIGHT (MIL) IS ON. *PE |
| IN-1-29-14 | 2014-02-27. Service bulletin. ELECTRICAL SYSTEM. HONDA: THE MALFUNCTION INDICATOR LAMP IS ILLUMINATED. STORED DTC P0158 (FRONT SECONDARY HEATED OXYGEN SENSOR CIRCUIT HIGH VOLTAGE) MAY BE PAIRED WITH P0138 (REAR SECONDARY HEATED OXYGEN SENSOR CIRCUIT HIGH VOLTAGE). AHM IS ATTEMPTING TO COLLECT SPECIFIC PARTS FROM THE VEHICLE BEFORE ANY EFFORT TO REPAIR IT HAS BEEN MADE. *JS |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.