ATF 油盘是在马自达Dealer吗？
Mazda Technical Service Bulletin (TSB) #01-010/16 addresses a common "false alarm" where the Check Engine light illuminates with Diagnostic Trouble Code (DTC) P0421:00 (Warm Up Catalyst Efficiency Below Threshold). This issue is primarily caused by improper control logic in Mitsubishi-made Powertrain Control Modules (PCM), which can be overly sensitive and falsely detect errors in the Air/Fuel (A/F) sensor. [1, 2, 3]
Affected Models and Identification
The TSB applies to the following vehicles equipped with the 2.5L engine and a Mitsubishi-made PCM: []
- 2014-2016 Mazda CX-5: 2014-2015 models with 2.5L A/T and 2016 models produced before April 8, 2015 (VINs lower than JM3KE**656820).
- 2014-2015 Mazda3: Japan-built models with VINs lower than JM1BM267077 and Mexico-built models with VINs lower than 3MZBM207478.
- 2014-2016 Mazda6: Various models within this generation. [1, 2, 4]
Diagnosis and Repair
The official fix for this issue is a PCM software update (reprogramming) using Mazda's Diagnostic System (M-MDS). [1]
- Initial Verification: Dealerships typically check Mode 6 data (OBDMID: 21, Test ID: 82) to confirm if the catalytic converter has actually failed or if it is a false software trigger.
- Warranty Coverage: This repair is often covered under the Federal Emission Warranty, which typically lasts for 8 years or 80,000 miles.
- Reprogramming Procedure: The process takes approximately 0.3 labor hours and involves reflashing the PCM with updated software logic. [1, 4, 5]
