# Service bulletin 01\-003\-18\-3421

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.

- Type: Service bulletin
- NHTSA id: 10136323
- Published by NHTSA: 2018\-05\-07
- Manufacturer's number: 01\-003\-18\-3421
- Manufacturer's date: 2018\-02\-12
- NHTSA component: ENGINE; FUEL SYSTEM, GASOLINE; POWER TRAIN

## NHTSA's summary

Some customers may experience a lack of power with no warning lights illuminated and no related DTCs stored. This concern most likely occurs when the fuel temperature is high and during situations where high power is required. This concern may be caused when the learning value for the low pressure fuel pump exceeds a certain level and the PCM limits engine power to avoid a lack of fuel injection. Even if the low pressure fuel pump has a problem, no DTCs are stored. To eliminate this concern, the PCM control logic has been modified not to limit engine power. After this modification, DTCs P0192:00 or P0087:00 are stored when the fuel injection amount is insufficient. P0192:00 \- High fuel pressure sensor circuit low input P0087:00 \- High fuel pressure sensor circuit range/performance problem.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10136323-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10136323-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine, Fuel system, Transmission and driveline

## Trouble codes named

P0087, P0192

## Vehicles listed

- 2016 to 2018 MAZDA CX\-9

## Recalls for the same vehicles and component

- [2021696](/recalls/tc/2021696.md), 2021-11-12: Fuel System
- [21V875000](/recalls/nhtsa/21V875000.md), 2021-11-12: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

## Other bulletins for the same vehicles and component

- [SA\-041\-26](/bulletins/11034447.md), 2026-07-03, Service bulletin: ELECTRICAL SYSTEM; ENGINE. This SA supersedes the previously issued SA\(s\) listed below. The changes are noted in Red. SA\-061/25 12/17/25 DESCRIPTION If you encounter any type of electrical concern \(e.g, dead battery, engine no start, DTC\(s\) stored...\), interview the customer before proceeding with normal MGSS diagnosis by asking if any aftermarket devices have been installed. Aftermarket devices may be the cause of the electrical concern. Below are a few examples of unusual electrical concerns caused by aftermarket devices. Examples: 1. Devices connected to the DLC\-2 \(battery discharge/DTC stored\) 2. Devices plugged into the 12V outlet 3. GPS tracking device \(engine no start/battery discharge\) 4. Dash cam \(DTC stored\) 5. Non\-certified USB cable \(Apple Carplay™/ Android Auto™ will not connect\) 6. Over\-sized wheels/tires \(incorrect GPS location\) 7. DTC C0023:14 8. Decorative trim and/or cover on the START/STOP ENGINE button Example 1: Some electrical devices connected to the DLC\-2 connector by insurance or mobile phone companies may cause: Battery discharge. The device may disrupt the CAN system battery saver mode. • IDS/MMDS will not communicate with the vehicle due to poor DLC\-2 connection. The aftermarket device may cause DLC\-2 female terminals to spread open.
- [SA\-029\-26](/bulletins/11032103.md), 2026-05-05, Service bulletin: UNKNOWN OR OTHER; ENGINE; POWER TRAIN; SERVICE BRAKES. This Service Alert supersedes the previously issued SA listed below: The changes are noted in Red. SA\-011/24 02/12/24, 06/06/24, 07/29/24 DESCRIPTION Mazda has developed factory recommended scheduled maintenance services that support all major vehicle systems. Mazda recommends dealers follow the scheduled maintenance tables as cited in the vehicle\-specific workshop manual or owner's manual. Services performed outside of Mazda's factory scheduled maintenance are not recommended. These services are unnecessary and create unneeded expenses for your customers. SCHEDULED MAINTENANCE Refer to the applicable Workshop Manual or Owner's Manual for vehicle \-specific manufacturer scheduled maintenance. Workshop Manual \- Refer to section 00\-00 SCHEDULED MAINTENANCE. Owner's Manual \- Refer to section 8 Maintenance and Care. b. Note: Please refer to the information below outlining the services not included in Mazda's Factory Scheduled Maintenance: IMPORTANT: Recommending fluid flushes when not necessary can lead to customer confusion and dissatisfaction. Fluid flushing for preventive maintenance purposes is strongly discouraged, unless otherwise specified in a published procedure \(Owner’s Manual, Workshop Manual, Technical Service Bulletin, etc.\).
- [SA\-026\-26](/bulletins/11032101.md), 2026-05-05, Service bulletin: ENGINE. This Service Alert supersedes the previously issued M\-Tip\(s\) listed below. The changes are noted in Red text. MT\-002/19 09/30/19 and 12/19/19 DESCRIPTION If an engine assembly is replaced after a catastrophic internal mechanical failure, clean the intake manifold internally before installing a replacement engine assembly. If the intake manifold is not cleaned properly, the replacement engine may fail prematurely. Metallic debris from the old engine \(with catastrophic internal mechanical failure\) may rest inside the intake manifold. When the new engine assembly is installed, debris in the intake manifold will be ingested into the new engine and cause internal damage. Clean the intake manifold internally to remove any debris from old engine before installing the new replacement engine assembly. If the intake manifold cannot be properly cleaned internally, replace it.
- [01\-008\-26](/bulletins/11032003.md), 2026-05-03, Service bulletin: POWER TRAIN. This bulletin supersedes the previously issued bulletin\(s\) listed below. The changes are noted in Red. 01\-008/23 06/05/23 Some vehicles may exhibit rattling noises from the engine compartment and oil leakage from the drive belt auto tensioner. This may be caused by insufficient sealing at the drive belt auto tensioner damper when the auto tensioner fully operates under both high ambient temperature and high load conditions. To eliminate this concern, the shape of the drive belt auto tensioner damper has been changed. REPAIR PROCEDURE If the tensioner is found to be "No Good" after completing the Drive Belt Auto Tensioner Inspection, replace it with a modified part according to the instructions on MGSS online:
- [SA\-014\-26](/bulletins/11030636.md), 2026-04-02, Service bulletin: ENGINE. This Service Alert supersedes the previously issued SA\(s\) and TSB\(s\) listed below: The changes are noted in Red. SA\-035/24 05/31/24 DESCRIPTION There is a concern that some water pumps are being replaced that are not faulty, due to signs of a very small coolant leak from the bleed hole. This Service Alert is to inform you about the water pump sealing mechanism and the criteria if replacement is necessary or not. A mechanical seal \(A\) is used for the water pump. This mechanical seal can seal coolant \(B\) by sliding a mating ring \(C\) against a seal ring \(D\). When the sliding surface temperature of the mechanical seal is more than 248 °F \(120 °C\) while driving, a small amount of steam \(E\) is leaked and bleeds through the bleeding hole \(F\). After drying, the steam leaves a green coolant deposit near the water pump bleed hole \(F\). This is a normal condition and does not require water pump replacement. The water pump should only be replaced if there is an accumulation of crystallized coolant near the bleed hole. When you encounter a water pump with coolant seepage marks, decide to replace it or not based on the following criteria using sample photos. NOTE: During the initial period of use\*, the sliding surfaces of the seals may not yet be fully settled, which can temporarily increase the amount of leakage. Continued use will allow the surfaces to settle, reducing the leakage. Replacing parts that are already settled with new ones will increase the leakage again until the new parts become conditioned. Therefore, replacement should be avoided in this initial period of use. \*As a guideline, this applies to vehicles with less than 1,860 miles \(3000 km\) of mileage.
- [SA\-056\-25](/bulletins/11026354.md), 2025-12-05, Service bulletin: POWER TRAIN. When inspected, the differential or PTO oil is dark or black. This is considered normal and NO repair should be performed. During production, differential ring and pinion gears receive a manganese phosphate coating \(commonly referred to as black oxide\). This coating forms a porous, oil\-retentive surface that improves boundary lubrication and reduces adhesive wear during initial contact cycles. Designed as a sacrificial layer, it is gradually removed under load throughout the break\-in process. As a result, after the first few hundred miles, or at the initial gear oil service interval, the lubricant may appear darkened by the worn\-off coating. It will contain trace ferrous particles from the normal run\-in of the gear teeth and bearing surfaces. This condition is expected and does not, by itself, indicate an issue with the differential or PTO gears.
- [SA\-052\-25](/bulletins/11026351.md), 2025-12-05, Service bulletin: ENGINE; POWER TRAIN. Some customer's might state that they notice fluid or oil leaking/dripping on the ground when the vehicle is parked. For this concern, inspect the vehicle for any trace of a fluid or oil leak and use the following examples as a guide to determine if it is severe enough to require a repair, or just to clean the area and monitor it at the next service. Examples of residue or seepage that may not be considered a leak and that may not require repair based on splash shield inspection.
- [SA\-051\-25](/bulletins/11026350.md), 2025-12-05, Service bulletin: STEERING; SUSPENSION; POWER TRAIN; WHEELS. Noise, Vibration, and Harshness \(NVH\) Diagnostic Guidelines Diagnostic Guidelines When diagnosing NVH concerns, it is essential to first classify the issue into one of three primary categories: Noise, Vibration, or Harshness. Many customer complaints may involve overlapping symptoms, such as both noise and vibration, so identifying the dominant characteristic is critical. Once the primary symptom is determined, follow the appropriate diagnostic path. For example, if a concern includes both noise and vibration but is related to vehicle speed, the vibration diagnostic path should be followed. When considering component replacement during the diagnostic process, it is best practice to start with the lowest cost or most accessible part unless diagnostic evidence clearly identifies a more expensive or complex component as the root cause. This approach helps minimize repair costs and avoids unnecessary part replacements. For example, a growling or bearing whine noise may be mistakenly attributed to internal components in the differential, transfer unit, or transmission, when the actual source is a wheel bearing. Misdiagnosis like this can lead to unnecessary repairs, added time and cost. To help prevent this, always follow the guidelines in the repair procedure.
- [CSP11a Warranty](/bulletins/11020034.md), 2025-07-02, Warranty extension: ENGINE. Mazda Motor Corporation has decided to conduct a Customer Service Program \(CSP11\) to extend the limited powertrain warranty to 10 years or 120,000 miles, whichever occurs first, for necessary repairs if the covered vehicle has coolant leaks at the cylinder head, around the exhaust manifold. A dealer must inspect and confirm the covered vehicle is exhibiting coolant leaks at the cylinder head around the exhaust manifold matching Technical Service Bulletin 01\-002/23 \(Feb. 10, 2023\) for the repair to be covered.
- [CSP11 Owner Letter](/bulletins/11012343.md), 2025-01-04, Warranty extension: ENGINE. Dear Mazda Owner: You are receiving this notice because Mazda’s records indicate that your 2019\-2020 CX\-5, 2016\-2020 CX\-9, or 2018\-2020 Mazda6 vehicle was equipped with a SKYACTIV\-G 2.5T \(Turbocharged\) engine \(“Covered Vehicle”\). Mazda Motor Corporation has decided to conduct a Customer Service Program CSP \(11\) to inform you that Mazda is extending the limited powertrain warranty to provide necessary repairs free of charge if your Covered Vehicle has coolant leaks at the cylinder head around the exhaust manifold and to inform you that you may be eligible to receive reimbursement for past out\-of\-pocket expenses you previously incurred for such repairs on the terms and conditions as described below. Powertrain Warranty Extension: Mazda is extending the limited powertrain warranty to 10 years or 120,000\-miles, whichever occurs first, to provide necessary repairs at no cost to you if your Covered Vehicle has coolant leaks at the cylinder head around the exhaust manifold. A dealer must inspect and confirm your Covered Vehicle is exhibiting coolant leaks at the cylinder head around the exhaust manifold matching Technical Service Bulletin 01\-002/23 \(Feb. 10, 2023\) for you to receive the repairs at no cost to you.

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