Check Engine Light on with DTC P0421 – 2014-2016 Mazda

Subject:

CHECK ENGINE LIGHT ON WITH DTC P0421

Bulletin No: 01-010/16
Last Issued: 04/07/2016

 

BULLETIN NOTE

This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted below in Red beside the change bars.

Previously Issued TSBs: Date(s) Issued
01-016/15 08/04/15

 

APPLICABLE MODEL(S)/VINS

2014-2015 Mazda3 (Japan built) vehicles with VINs lower than JM1BM******267077 (produced before March 30, 2015)

2014-2015 Mazda3 (Mexico built) vehicles with VINs lower than 3MZBM******207478 (produced before April 1, 2015)

2014-2016 Mazda6 vehicles with VINs lower than JM1GJ******425952 (produced before April 8, 2015)

2014-2015 CX-5 (2.5L A/T only)

2016 CX-5 vehicles with VINs lower than JM3KE******656820 (produced before April 8, 2015)

 

DESCRIPTION

Some vehicles may experience the check engine light on with DTC P0421:00 (Catalytic converter system) without experiencing poor engine performance or misfire (Mitsubishi PCM only).

This is caused by improper control logic of the PCM that may detect false error of the A/F sensor, resulting in false detection of P0421. To correct the problem, the control logic of the PCM has been changed. Catalyst monitor function explanation

  • The PCM monitors the oxygen storage amount proportional to catalytic converter purification characteristic.
  • The PCM starts to monitor after recovery (fuel injection starts) from fuel cut control.
  • The PCM temporarily changes the target air/fuel ratio to rich at fuel cut recovery, and detects the response time until the HO2S output signal outputs the voltage on the rich side.
  • If the catalytic converter purification characteristic deteriorates, the amount of the time until the HO2S detects the voltage on the rich side is shorter compared to the normal purification characteristic as shown. The PCM detects a catalytic converter malfunction using this characteristic.

Catalyst monitor function

 

REPAIR PROCEDURE

Verification of Condition of Warm Up Three-Way Catalytic Converter (WU-TWC)

  1. Verify the condition of the Warm Up Three-Way Catalytic Converter (WU-TWC) by checking the value “Catalyst monitor bank 1” on MODE6 with M-MDS or Scan Tool.
    1. Go to Powertrain => OBD Test Modes => Mode6 On Board Test Results

Mode6 On Board Test Results

    1. Go to Catalyst monitor bank 1 => Equivalence Oxygen Storage Component (OBDMID: 21, Test ID: 82)

Catalyst monitor bank 1 => Equivalence Oxygen Storage Component (OBDMID: 21, Test ID: 82)

  • If the value is “equal to 0”, clear the DTC and go to PCM Reprogramming.
  • If the value is “equal to 2 or higher”, clear the DTC and go to PCM Reprogramming.
  • If the value is “between 0 and 2”, follow these steps:
    1. Clear the DTC and reprogram the PCM.
    2. Disconnect the negative battery cable to clear the PCM memory (at least 1 min.)
    3. Go into the “DRIVE MODE”:
      1. Drive the vehicle at about 50mph for 15min.
      2. Decelerate to 25 mph, and shift into M-Mode, 3rd gear.
      3. Accelerate to 40 mph while holding the transmission in 3rd gear.
      4. Stay at 40 mph for 3 seconds, then release the accelerator pedal and decelerate to 25 mph.
      5. Accelerate to 40 mph again while holding the transmission in 3rd gear.
      6. Stay at 40 mph for 3 seconds, then release the accelerator pedal and decelerate to 25 mph again.
      7. Repeat steps b-f (acceleration and deceleration) at least 10 times.
    4. Check the value “Catalyst monitor bank 1” on MODE6 with M-MDS.
      • If the value is “equal to 1 or higher than 1”, WU-TWC can be judged as OK.
      • If the value is “less than 1”, WU-TWC should be deteriorated. Refer to MS3 online instructions for DTC P0421:00 or Workshop manual section 01-01.

 

PCM Reprogramming

  1. Using IDS 99.05 or later software, reprogram the PCM to the latest calibration (refer to “Calibration Information” table) by following the “Module Reprogramming” procedure.

 

NOTE:

  • Verify the current PCM file name in the vehicle by the log view screen. If it is the same as found in the chart below (or later), it is not necessary to reprogram the PCM.
  • Always update the IDS tool first, then follow the on-screen instructions to download the calibration file for PCM reprogramming.
  • Refer to “Service Caution for reprogramming” on MS3 IDS Page.
  • After reprogramming, verify the file name matches with the chart below.

 

NOTE:

  • Always update the IDS tool first, then follow on-screen instructions to download the needed calibration file for PCM reprogramming.
  • It is not necessary to remove any fuses or relays during PCM reprogramming when the IDS screen prompts you to do so. You may accidentally stop power to one of the PCM terminals and cause the PCM to be blanked, or you may receive error messages during the IDS reprogramming procedure.
  • IDS shows the calibration part numbers after programming the PCM.
  • Please be aware that PCM calibration part numbers and file names listed in any Service Bulletin may change due to future releases of IDS software, and additional revisions made to those calibrations for service related concerns.
  • When reprogramming a PCM, IDS will always display the “latest” calibration P/N available for that vehicle. If any calibration has been revised/updated to contain new information for a new service concern/issue, it will also contain all previously released calibrations.
  • Start/Stop button vehicles only: DO NOT press the start/stop button during the reprogramming process.
  • When performing this procedure, we recommend using the “Power Supply” mode in the Battery Management System to keep the vehicle battery up to capacity. If a different charger is used, make sure it does not exceed 20 AMPS. If it exceeds 20 AMPS, it could damage the VCM.

 

  1. After performing the PCM reprogramming procedure, clear DTCs.
  2. After clearing DTCs, start the engine and confirm that no warning lights stay on.

 

NOTE:

  • If any DTCs should remain after performing DTC erase, diagnose the DTCs using MS3 online instructions or Workshop Manual section 01-02.
  • After PCM reprogramming, it is no longer necessary to road test the vehicle to “relearn” KAM (Keep Alive Memory).

CALIBRATION INFORMATION

2014-2015 Mazda3 (Japan built) for VINs starting with JM1

Engine Emissions Transmission File Name Note
2.0L Calif (PZEV) M/T PELC-188K2-C
A/T PELA-188K2-C
Calif (ULEV) M/T PE18-188K2-E
A/T PE19-188K2-D
Fed M/T PE5J-188K2-E
A/T PE5K-188K2-D
2.5L Calif (PZEV) M/T PYBE-188K2-C Improved from B-level
A/T PY08-188K2-D w/out i-ELOOP
PY2P-188K2-F w/ i-ELOOP (to Feb 1, 2015)
PYFG-188K2-A w/ i-ELOOP (from Feb 1, 2015)
Fed M/T PYBG-188K2-B
A/T PY2J-188K2-D w/out i-ELOOP
PY2R-188K2-F w/ i-ELOOP (to Feb 1, 2015)
PYFH-188K2-A w/ i-ELOOP (from Feb 1, 2015)
Mexico M/T PYBJ-188K2-B
A/T PY8E-188K2-C

 

2014-2015 Mazda3 (Mexico built) for VINs starting with 3MZ

Emissions Transmission File Name Note
Calif (PZEV) M/T PELG-188K2-C Improved from B level
A/T PELE-188K2-C Improved from B level
Calif (ULEV) M/T PEDG-188K2-D Improved from C level
A/T PEDH-188K2-C Improved from B level
Fed M/T PEDJ-188K2-D Improved from C level
A/T PEDK-188K2-C Improved from B level
Mexico M/T PEGN-188K2-B
A/T PEGR-188K2-B

 

2014-2015 Mazda6

Emissions Transmission File Name Note
Calif (PZEV) M/T PYXS-188K2-  Old file name: PY1D-188K2-*
A/T PYXT-188K2-  Old file name: PY1E-188K2-*
PYXW-188K2- w/ i-ELOOP

Old file name: PY8G-188K2-*

Calif (ULEV) M/T PY8A-188K2-D
A/T PY8B-188K2-D
PY1G-188K2-H w/ i-ELOOP
Fed M/T PYXX-188K2-  Old file name: PY1H-188K2-*
A/T PYXZ-188K2-  Old file name: PY1J-188K2-*
PZY1-188K2- w/ i-ELOOP

Old file name: PY2E-188K2-*

Mexico M/T PZZ4-188K2- Old file name: PY4J-188K2-*
A/T PZZ5-188K2- Old file name: PY4K-188K2-*

 

2016 Mazda6

Emissions Transmission File Name Note
Calif (PZEV) M/T PY9S-188K2-C
A/T PY9V-188K2-C
PY9X-188K2-C w/ i-ELOOP
Fed M/T PYAB-188K2-B
A/T PYAD-188K2-B
PYAF-188K2-B w/ i-ELOOP
Mexico M/T PYBA-188K2-B
A/T PYBC-188K2-B w/ i-ELOOP

 

2014-2015 CX-5

Engine Emissions Transmission Drive File Name Notes
2.0L Mexico A/T 2WD PEBG-188K2-D
2.5L Calif A/T 2WD PYXH-188K2- Old file name: PY09-188K2-*
4WD PYXJ-188K2- Old file name: PY2W-188K2-*
Fed A/T 2WD PYXK-188K2- Old file name: PY2V-188K2-*
4WD PYXL-188K2- Old file name: PY2X-188K2-*
Mexico A/T 2WD PY5L-188K2-D
4WD PY5M-188K2-D

 

2016 CX-5

Engine Emissions Transmission Drive File Name
2.0L Calif M/T 2WD PS32-188K2-C
A/T 2WD PS33-188K2-C
4WD PS34-188K2-C
Fed M/T 2WD PS35-188K2-C
A/T 2WD PS36-188K2-C
4WD PS37-188K2-C
Mexico A/T 2WD PS38-188K2-C
2.5L Calif A/T 2WD PYAJ-188K2-C
4WD PYAK-188K2-B
Fed A/T 2WD PYAL-188K2-B
4WD PYAM-188K2-C
Mexico A/T 2WD PYAN-188K2-B
4WD PYAP-188K2-B

NOTE: It is not necessary to order a PCM part for this repair procedure.

 

WARRANTY INFORMATION

NOTE:

  • This warranty information applies only to verified customer complaints on vehicles eligible for warranty repair.
  • This repair will be covered under Mazda’s Federal Emission Warranty (long term) or Calif. PZEV Emission Warranty.
  • Additional diagnostic time cannot be claimed for this repair.
  • Keep a copy of Mode 6 report on file for as required documentation purposes.
Warranty Type A
Symptom Code 6X
Damage Code 9W
DTC P0421
Part Number Main Cause 5555-RP-PCM
Quantity 0
Operation Number / Labor Hours XXL4PXFX / 0.3 Hrs. (Reprogramming)

XXL4PAFX / 0.8 Hrs. (Reprogramming and DRIVE MODE)


01-010/16

 

04/07/2016

https://www.nhtsa.gov/recalls?nhtsaId=10093127

https://static.nhtsa.gov/odi/tsbs/2016/SB-10093127-6903.pdf

Download (PDF, 129KB)


 

Mazda Reprogramming

Mazda Reprogramming

 


MDSFA/MMP Required Hardware (Not Included)  

As shown in the diagram, an SAE J2534 pass-thru device is required to use the application.

J2534 Connection

 

Hardware validated by Mazda can be purchased separately from a third-party supplier. Validation has been done using the following J2534 pass-thru device and cables:

  • CarDAQ+ (includes RS232 and Ethernet cables)
  • Cable between CarDAQ and Vehicle – CD2534-J1962-FEPS (Sold separately / Required)

 

Important Information: Mazda makes no representations about the performance of third-party passthru devices. This pass-thru device list is provided voluntarily and as a courtesy. While our software meets SAE J2534, the pass-thru device manufacturer is responsible for making sure their pass-thru device operates properly on each Mazda vehicle and with Mazda software. We have listed the devices below because their manufacturers have attested that the tools have been validated to work. From time to time, we may test these devices. If we determine they do not operate properly or are obsolete, we may remove them from the list, without notice. Additionally, pass-thru devices listed here have been listed for their use with Mazda North American products only. While they may work with some European and other vehicles, they may not meet the requirements for those regions or operate properly.

 

Hardware can be purchased from a third-party supplier. Mazda has validated the following J2534 passthru devices:

 

**J2534 Pass-thru Device Manufacturer
*CarDAQ+ Drew Technologies Inc.
*Pass-Thru+XS Actia Corp.
*Snap-On Pass Thru Pro II Snap-On.
*Universal Reprogrammer EASE Diagnostics
*FLASH2 All-Makes Reprogrammer CARDONE Industries
*Bosch Mastertech VCI Bosch Diagnostics

*Contact the device manufacturer for the latest DLL and firmware versions.

**Many J2534 manufacturers sell and market similar J2534 devices with like names. Please exercise caution when using the list above for purposes of understanding devices Mazda has validated for use. J2534 Pass-thru Device Suppliers: Mazda has validated the J2534 devices listed on this page. Mazda does not plan to validate additional J2534 devices at this time.

 

PCM Reprogramming Process Overview 

  • Purchase a subscription to PCM Reprogramming on this website.
  • Download the application and install it on your PC.
  • Connect the J2534 pass-thru device to the PC and the vehicle, and power it up.
  • Run the application installed on your PC.
  • The application will determine whether or not a new calibration file is available.
  • If you choose to use the new file, the module will be reprogrammed.
  • If PATS functionality is required, it can be chosen from the toolbox.

 

CarDAQ-Plus 2 Diagnostic Code Reader and J2534 Programming Tool
CarDAQ-Plus
CarDAQ-M
VSI J2534 ECU Reprogrammer
Drew Tech Mongoose Pro USB to CAN ISO9141 Interface

 

https://www.mazdaserviceinfo.com/pcm-reflashing


 

SaleBestseller No. 1
VXDIAG VCX Nano GDS2 and Tech2Win Diagnostic Programming System for GM/Opel
  • VXDIAG VCX NANO Box is PC-to-vehicle interface compatible with multiple software applications, minimizing your investment in multiple brand-specific diagnostic interfaces
  • VXDIAG VCX Nano for GM/OPEL compatible with GDS and Tech2win software, support for GM/OPEL Diagnose and programming,for programming function, you would need buy software subscription online
  • Fully compatible with SAE-J2534-1 & SAE-J2534-2; Quick access to vehicle data for maintenance or management reports; Support all current and most legacy vehicle protocols: CAN, UART, KW2000, Class2, GM LAN, etc.
  • About Software: Our hardware is compatible with original software and for SPS programming online you need purchase subscription online.
  • Installation Tips: Tech2win software can only be installed on 32bit computer(win7 or win10 both ok) and please attention Tech2win software can not be installed on virtual machine, need install on physica system. For any technical problem, please feel free to contact us at any time, we have engineer can assist you online.
Bestseller No. 2
VXDIAG VCX NANO Multiple GDS2 and TIS2WEB Diagnostic/Programming System for GM/Opel
  • Fully compatible with SAE-J2534-1 & SAE-J2534-2
  • USB vehicle-to-PC connectivity
  • All current and most legacy vehicle protocols: CAN, UART, KW2000, Class2, GM LAN, etc.
  • CE and FCC compliance for hardware
  • Firmware Updatable
Bestseller No. 3
VXDIAG VCX Nano Diagnose and Programming Tool Compatible for Toyota and Lexus SAE J2534 WiFi Version
  • VCX is designed on the basis of the latest automotive international standards so that it can support many professional automotive diagnostic applications
  • WIFI Version VXDIAG VCX Nano compatible for TOYOTA and Lexus, support both USB connection and WIFI connection, support latest version software, Compatible with varieties protocols. can be very easy to connect various automotive bus to a PC
  • OS support both WINDOWS XP and Windows 7, Software support multi-languages: Chinese, English, French, Italian, Spanish, German, ec
  • Small size, easy to carry and convenient for us
  • One year warranty
Bestseller No. 5
Autel MaxiCOM MK908P Diagnostic Scanner – OBD2 Automotive Scan Tool with MaxiVideo MV105 Including ECU Coding, ECU Programming and Video Inspection for Professional Technicians
  • SUPERIOR PERFORMANCE: Possesses advanced Samsung Exynos hexa-core Processor and 10.1” clear and sensitive touch screen make the diagnosis fast and easy. Comprehensive OE-Level diagnostic and OBDII services for codes, live data, actuation test, adaptations, coding and advanced ECU programming.
  • SPECIAL FEATURES: Adds the free new MaxiFlash Elite (J2534 box) to facilitate your work for ECU programming of BMW&Benz
  • CONSIDERATE COMBINATION: Wonderful for up-close visual inspections in confined areas, such as engine cylinders and small part inspections with MV105, the internal situation will be displayed on the tablet--- more convenient to find the vehicle problems.Adds the Oscilloscope MP408(not included) ,virtually measure and test all the electrical and electronic components and circuits in any modern vehicles.
  • EXTENSIVE COVERAGE: Full OBD functions, 11 reset functions and full systems diagnoses work on over 80 1996 US-based , 2000 European-based and newer OBD2/EOBD protocol vehicles.
  • TECHNICAL SUPPORT & SERVICE: Cloud-based Data Manager for records saving & Remote Technical Support for convenient demonstration & Wi-Fi tech for update directly.It come with 1 year free update and 1 year warranty for any quality problems.
SaleBestseller No. 6
Autel Maxisys CV MS908CV Heavy Duty Diagnostic Tool with J-2534 ECU Programming, BT, WiFi Connection
  • The Autel Maxisys MS908CV is especially made for working on Heavy Duty vehicles. It contains a whole set of heavy duty vehicle connectors and provides access to all the commonly performed service functions: Oil Reset, EPB, Brake Bleeding, DPF & SCR, Immo & keys, Injector Throttle and other regular maintenance functions
  • The complete diagnostic tool kit includes a compact sized MaxiFlash Elite which performs J2534 and J2534-2 pass-thru programming and provides BT VCI communication between the vehicle and the MaxiSys CV tablet.
  • The diagnostic scan tool provides the special functions that complete repairs including Injector Quantity Adjustment, DPF Regeneration, Adaptations, Calibrations, Maintenance Resets.
  • The automotive scanner read and clear codes, view and graph live data, perform tool-guided maintenance services, complete an array of special functions and diagnose manufacturer-specific systems including Allison transmissions, Bendix ABS Brake systems, Detroit Diesel Engines and Eaton and Wabash ABS trailer brakes.
  • Extensive vehicle coverage for more than 80 US, Asian and European commercial vehicles and industrial machine brands.
Bestseller No. 7
VXDIAG VCX Nano Diagnose and Programming Tool Compatible with J2534
  • VCX is designed on the basis of the latest automotive international standards so that it can support many professional automotive diagnostic applications
  • VXDIAG VCX Nano support latest version software, Compatible with varieties protocols. can be very easy to connect various automotive bus to a PC
  • OS support both WINDOWS XP and Windows 7, Software support multi-languages: Chinese, English, French, Italian, Spanish, German, ec
  • Small size, easy to carry and convenient for us
  • We provide full time online support, if you have any questions about our device, please feel free to contact us online via ask us a question or send us email
Bestseller No. 8
Autel MaxiCOM MK908P Diagnostic Scanner Automotive Scan Tool with ECU Programming and J2534 Reprogramming + Free Oscilloscope MaxiScope MP408
  • 【SUPERIOR CODING & PROGRAMMING】 Supports coding and programming especially for BMW and Mercedes. With the VCI of MK908P for SAE J2534-1 and J2534-2 protocols, it can replace the existing software and firmware in ECU without expensive original equipment.
  • 【WIDE DIAGNOSTIC SOLUTIONS】 Well capable of VCM coding and programming, TPMS coding, intelligent cruise control (ICC), ECU coding, live data, dashboard matching, airbag system reset, anti-theft key matching and more.
  • 【POWERFUL DIAGNOSTIC TOOL】 The oscilloscope MP408 combine with MaxiCOM MK908P is able to measure and test virtually all the electrical and electronic components and circuits in any modern vehicles, providing you an insight to the inner workings of a vehicle’s electronic circuits.
  • 【HIGH-EFFICIENCY OF USE】 Being MS908P upgraded, it is Autel’s latest and most sophisticated diagnostic scanner which boasts the best hardware including Hexa-CPU, 2GB RAM etc. for fast boot-up and multitasking, and the ergonomic design to resist damage of heavy use.
  • 【WARRANTY & UPDATE】 You can get quality related services within 12 months warranty, besides, 12 months free online update is available for the latest bug fixes and newly added parameters and car models.
Bestseller No. 9
Autel MaxiSys Elite Automotive Diagnostic Tool - with Free MaxiScope MP408 Including Advanced J2534 ECU Coding & Programming for Benz & BMW with 2 Years Free Update
  • ECU CODING & PROGRAMMING: Worked with J2534 Pass-thru device, MaxiSys Elite is capable of ECU programming for Benz and BMW.
  • EXTENSIVE COVERAGE: Available for over 80 1996 US-based, 2000 European-based and newer OBD2 protocol vehicles with full OBD functions, 11 reset functions and full systems diagnoses
  • EXCELLENT PERFORMANCE: Worked with MaxiScope basic kit MP408, MaxiSys Elite provides users with an insight to the inner workings of a vehicle's electronic circuits
  • TECHNICAL SUPPORT: Remote Tech Support for real-time software update notifications via internet. Interactive Data Logging Sessions for direct contact with Autel. One-stop multitasking for ideal management of data
  • THOUGHTFUL DESIGNS: MaxiSys Elite is with rubberized outer protection and a rugged internal housing. MP408 features color coded 4-channel control panel and one-click auto setup of voltage scale and time base
Bestseller No. 10
FORScan OBD2 Adapter, VINT-TT55502 ELMconfig ELM327 modified For all Windows compatible with Ford Cars F150 F250 and Light Pickup Truck Scan Tool, Code Reader MS-CAN HS-CAN Switch
  • It is one of favorite tools and accessories sought by Ford owners. It has been flawless in scanning, programming and hiding modules for models like Ford F150, F250, F350, F450, Ranger, S-Max, C-Max, Transit, Mondeo, Fusion, Kuga, Mustang, Explorer, Edge and other cars and light pickup Ford trucks— all from year 1996 and newer makes.
  • The MS-CAN & HS-CAN toggle switch will help you conveniently access, diagnose and configure the as-built data of your vehicle. This switch has been improved to smoothly access and communicate with the existing modules in your vehicle.
  • Discover endless Mods with FORscan and apply them to your vehicle.You can access the Global Window feature, Bambi Mod, reverse tilt mirrors, tire size correction, Perpendicular Park, Secure Idle, 5 turn signal flash, heated steering wheel, disabled double horn honk, disabled door ajar chime, and many more! Other supported softwares are FoCCCus, ELMconfig and FF2.
  • This interface runs at a constant speed of 500kbit/s. Hook up it to your car, connect to internet, update drivers, access your chosen ELM327-based software, and begin the vehicle diagnostics.

Last update on 2019-12-10 / Affiliate links / Images from Amazon Product Advertising API

Last update on 2019-12-10 / Affiliate links / Images from Amazon Product Advertising API

Leave A Comment

Your email address will not be published. Required fields are marked *

*

This site uses Akismet to reduce spam. Learn how your comment data is processed.