WenmarOpen by Wenmar Pro

Service bulletins for the 2018 Mazda CX-5

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.

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

By type

By component

By trouble code

By topic

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
01-010-19-3582a2019-05-30. Service bulletin. ENGINE AND ENGINE COOLING. Some vehicles may experience a lack of power and the check engine light on with DTC P61B:00 stored in the PCM memory when driving in high temperatures at high elevations. DTC P061B:00 - [PCM] Internal control module torque calculation performance problem This concern may be caused by improper PCM control logic. The engine torque calculation error may increase in high temperatures at high elevations. To eliminate this concern, the PCM software has been modified.
SA-015-192019-04-25. Service bulletin. ENGINE. If you receive a customer concern with the check engine light coming on and DTC P3400 (cylinder deactivation system malfunction) stored, perform the inspection in the Repair Procedure.
SA-012-192019-04-25. Service bulletin. ENGINE. On some vehicles, a tapping or knocking noise may be heard from the top end after the engine cools down (vehicle is parked overnight) or it has been idling for an extended time. The tapping noise will decreases as the vehicle is being driven or if the RPM is held above 2500-3000 RPM.
01-011-19-35862019-04-25. Service bulletin. ENGINE. Some customers may experience a check engine light illuminating with DTC P2096:00 stored in PCM memory. DTC P2096:00 - Air fuel too lean. NOTE: This concern occurs only on vehicles with PCMs manufactured by Mitsubishi. Due to improper control logic of the PCM, a false error may be detected. To eliminate this concern, the PCM software has been modified.
01-010-19-35822019-03-29. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ENGINE. Some vehicles may experience a lack of power and the check engine light on with DTC P61B:00 stored in the PCM memory when driving in high temperatures at high elevations. DTC P061B:00 - [PCM] Internal control module torque calculation performance problem.This concern may be caused by improper PCM control logic. The engine torque calculation error may increase in high temperatures at high elevations. To eliminate this concern, the PCM software has been modified.
00-003-19-35832019-03-21. Service bulletin. FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY; FUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING; EQUIPMENT. In support of the new MRT distribution, Mazda will ship to dealers a new Dual Purpose Diagnostic Leak Detector beginning March, 2019. Training videos will be posted to MGSS shortly and Workshop Manual procedures will be revised gradually.
SA-009-192019-03-11. Service bulletin. ENGINE. If you encounter a 2018 CX-5 (cylinder deactivation) with DTC P2096, contact Hotline for instructions.
SA-005-192019-03-11. Service bulletin. ENGINE. A tapping/rattling noise may be noticed from the valve train area. This condition usually occurs after the engine has been turned off at normal operating temperature and then not warmed up to full operating temperature during the next series of cold starts. This operating condition can occur, for example, on new vehicles which have been delivered to Mazda dealers (due to loading and unloading from transport trucks or customers moving their vehicles in and out of their garages to wash the vehicle, etc.)
01-007-19-35412019-02-19. Service bulletin. ENGINE. When the engine is started for the first time after parking the vehicle overnight in cold conditions (below 32 degrees Fahrenheit / 0 degrees Celsius), some vehicles may exhibit a rough idle and/or the check engine light on with any of the following DTC(s) stored in memory. P0300 - Random misfire detected P0301 - Cylinder No. 1 misfire detected P0302 - Cylinder No. 2 misfire detected P0303 - Cylinder No. 3 misfire detected P0304 - Cylinder No.4 misfire detected. This may be caused by frozen water accumulated in the main silencer, restricting exhaust flow.
01-005-19-35482019-02-19. Service bulletin. ENGINE AND ENGINE COOLING. Some vehicles may exhibit the check engine light on with DTC P0456 stored in the PCM memory. P0456: EVAP system leak detected (very small leak). The concern is most likely the result of the customer not getting the fuel cap completely closed after fueling the vehicle. This causes a small fuel vapor leak and turns DTC P0456 on.
01-004-19-35582019-02-19. Service bulletin. ENGINE AND ENGINE COOLING. On some vehicles, a sulfur smell or 'rotten egg' odor may be noticed coming from the exhaust system. The odor is usually noticed after a cold start, fast idle, extended periods of idling and full throttle acceleration. Sulfur smell is not an indication of an engine concern and will not cause reduced driveability or durability of the engine or any of its emission components. The sulfur smell or 'rotten egg' odor is caused by high amounts of sulfur in the gasoline being used in the vehicle. Sulfur is normally eliminated during the refining process, but the EPA regulation of sulfur in gasoline differs from state to state. Vehicles using fuel containing high amounts of sulfur will most likely emit sulfur smell from the exhaust system.When high sulfur fuel is burned, there is a chemical reaction in the catalytic converter causing the sulfur tooxidize. As the vehicle is driven, the oxidizing reaction odor in the converter will decrease with mileage and age.
01-003-19-35572019-02-19. Service bulletin. ENGINE. Some vehicles may experience the CHECK ENGINE LIGHT ON with DTC P2610 and P2507 stored inmemory after engine start and room fuse 15A (A) removed. P2610:00: Instrument cluster internal engine off timer performance problem P2507:00: PCM battery voltage low input As a past malfunction, the customer will not notice it (no warning light illuminated), but the DTC may be found during a vehicle service. P2507 in this situation is only applicable on 2016 and later models. This is caused by the engine being started 3 or more times after a short duration of engine off (less than 15 seconds) with the room fused removed. NOTE: The odometer will display "F0-002" during transport mode (room fuse 15A removed). Transport mode is canceled when room fuse 15A is installed or the vehicle odometer is more than 12.4mi (20km). Vehicles in dealer inventory with this concern should be repaired using the following repair procedure.
MT-009-182019-02-19. Service bulletin. ENGINE AND ENGINE COOLING. If an oil pressure inspection is needed on a SKYACTIV-G engine, use the Special Service Tool (SST) set shown below and refer to the instructions on MGSS online: CX-3: (OIL PRESSURE INSPECTION [SKYACTIV-G 2.0] ), MX-3: (OIL PRESSURE INSPECTION [SKYACTIV-G 2.0] ), Mazda6: (OIL PRESSURE INSPECTION [SKYACTIV-G 2.5] ), Mazda3: (OIL PRESSURE INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] ), CX-5: (OIL PRESSURE INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION)] ). If the Special Service Tool (SST) set above is not available at your dealership, an aftermarket Engine Oil Pressure Gauge can be used along with a locally sourced Oil Pressure Switch Adapter, like the one shown below.
SA-041-182019-02-19. Service bulletin. ENGINE. If you receive a customer complain of lack of power, rough idle, engine noise with stored DTC's P0340:00, P0304:00, P3400:00, P349B:00, and/or P3498:00, perform the following.
01-022-18-3528a2018-12-17. Service bulletin. EQUIPMENT; ENGINE. Some vehicles may exhibit an excessive body vibration/unusual noise when idling or driving after parking inextremely cold temperatures (-25°C/-13°F). NOTE: This excessive vibration does not occur if the engine mount rubber No.1 is over -25°C/-13°F. This may be caused by the No. 1 engine mount rubber hardening under extremely cold temperatures due to inappropriate characteristic of the engine mount rubber. To eliminate this concern, the material of the No.1 engine mount rubber has been changed to increase the damping force under extremely cold temperatures.
MT-009-182018-12-17. Service bulletin. ENGINE AND ENGINE COOLING. If an oil pressure inspection is needed on a SKYACTIV-G engine, use the Special Service Tool (SST) set shown below and refer to the instructions on MGSS online: CX-3: (OIL PRESSURE INSPECTION [SKYACTIV-G 2.0] ), MX-3: (OIL PRESSURE INSPECTION [SKYACTIV-G 2.0] ), Mazda6: (OIL PRESSURE INSPECTION [SKYACTIV-G 2.5] ), Mazda3: (OIL PRESSURE INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] ), CX-5: (OIL PRESSURE INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION)] ). If the Special Service Tool (SST) set above is not available at your dealership, an aftermarket Engine Oil Pressure Gauge can be used along with a locally sourced Oil Pressure Switch Adapter, like the one shown below.
09-037-18-3534a2018-11-13. Service bulletin. ELECTRICAL SYSTEM; ENGINE. Some vehicles equipped with MAZDA CONNECT may exhibit the following oil maintenance monitor concerns on the center display: The wrench light (Oil Change Due message) cannot be cleared using MAZDA CONNECT/Applications/Vehicle Status Monitor/Maintenance reset menu. The wrench light (Oil Change Due message) is displayed before the oil change is due. Vehicles with multi-information display Vehicles without multi-information display This is caused by only one reset procedure being performed when the oil is changed, usually using the center display. Two reset procedures are required, one is using the trip meter switch to reset the powertrain control module (PCM) and the other is using the center display to reset the connectivity master unit (CMU). To correct this issue, the CMU software has been modified so that the oil maintenance monitor reset operation on the center display resets both the CMU and the PCM at the same time. With this change, there set operation using the trip meter switch is now unnecessary.
01-021-18-3514a2018-11-13. Service bulletin. ENGINE. Some vehicles may experience a lack of power and the check engine light on with DTC P61B:00 stored in the PCM memory when driving in high temperatures at high elevations. DTC P061B:00 - [PCM] Internal control module torque calculation performance problem. This concern may be caused by improper PCM control logic. The engine torque calculation error may increase in high temperatures at high elevations. To eliminate this concern, the PCM software has been modified.
01-020-18-35212018-11-13. Service bulletin. ENGINE. Some vehicles may experience a check engine light on with DTC P0524 stored in the PCM memory. It is accompanied by a master warning indication/warning light illumination, engine oil pressure indication/engine oil warning light illumination. DTC P0524:00: Engine oil pressure too low. Due to improper PCM control logic, the engine oil valve may not work quickly enough under certain situations, resulting in the engine oil pressure increasing slower than usual. To eliminate this concern, the PCM software has been modified.
01-015-18-3513a2018-11-13. Service bulletin. ENGINE. Some vehicles may experience a lack of power and the check engine light on with DTC P061B:00 and U0401:00 stored in the PCM memory when engine cranking is interrupted and on A/T vehicles, DTC U0442:00 is also stored. This concern most likely occurs when the brake pedal is released during engine cranking. DTC P061B:00 - [PCM] Internal control module torque calculation performance problem. DTC U0401:00 - Signal error from PCM DTC U0442:00 - [TCM] Invalid data received from PCM. Due to an improper control logic of the PCM, the engine torque calculation error detection is too sensitive. To eliminate this concern, the PCM software has been modified.
01-016-18-35222018-10-09. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. On some vehicles, a sulfur smell or 'rotten egg' odor may be noticed coming from the exhaust system. The odor is usually noticed after a cold start, fast idle, extended periods of idling and full throttle acceleration. Sulfur smell is not an indication of an engine concern and will not cause reduced driveability or durability of the engine or any of its emission components. The sulfur smell or 'rotten egg' odor is caused by high amounts of sulfur in the gasoline being used in the vehicle. Sulfur is normally eliminated during the refining process, but the EPA regulation of sulfur in gasoline differs from state to state. Vehicles using fuel containing high amounts of sulfur will most likely emit sulfur smell from the exhaust system. When high sulfur fuel is burned, there is a chemical reaction in the catalytic converter causing the sulfur to oxidize. As the vehicle is driven, the oxidizing reaction odor in the converter will decrease with mileage and age.
MT-008-182018-10-09. Service bulletin. ENGINE; ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Some customers may complain about: Intermittent engine no start, Instrument cluster red security indicator light ON, Engine Start/Start Button Amber indicator, light flashing, Battery discharge, Electrical relay buzzing noise.This may be caused by: A key in a purse near a cell phone. The cell phone radio waves may interrupt the immobilizer system. An aftermarket cell phone charger. The charger may produce electrical noise that interrupts the immobilizer system. An aftermarket GPS tracker. Some aftermarket devices that are wired to the vehicles?s wiring harness may create unusual electrical symptoms.
01-015-18-35132018-09-10. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES; ENGINE. Some vehicles may experience a lack of power and the check engine light on with DTC P061B:00 stored in the PCM memory when engine cranking is interrupted. This concern most likely occurs when the brake pedal is released during engine cranking. DTC P061B:00 - [PCM] Internal control module torque calculation performance problem. Due to an improper control logic of the PCM, the engine torque calculation error detection is too sensitive. To eliminate this concern, the PCM software has been modified.
MT-008-182018-08-27. Service bulletin. EQUIPMENT:ELECTRICAL; ENGINE. ENGINE NO START (KEY NOT DETECTED): Some customers may complain about the following: Intermittent engine no start, Instrument cluster red security indicator light ON, Engine Start/Start Button Amber indicator light flashing.
MT-007-182018-08-27. Service bulletin. VISIBILITY:REARVIEW MIRRORS/DEVICES; ENGINE; ELECTRICAL SYSTEM. ENGINE NO START AND / OR REAR VIEW MONITOR DISPLAY IS BLURRY DUE TO AFTERMARKET ELECTRICAL DEVICE: Some customers may complain about the following: Engine no start. A blurry rear view monitor display. This may be caused by an aftermarket accessory device. Some aftermarket electrical devices (e.g., an accessory cell phone charger) may create excessive electrical noise. The noise may interrupt some of the vehicle electrical systems. Below are a few examples of an aftermarket cell phone charger that is interrupting the vehicle electrical systems.

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