HINO
SB-14-012
Manufacturer communications
- Publication date
- 2014-07-15
- Received by NHTSA
- 2021-01-19
- NHTSA record numbers
- 10185594
Manufacturer summary
Original wording in English
A subject vehicle may exhibit an illuminated check engine lamp with DTC (Diagnostic Trouble Code) P0421 (Catalyst efficiency below threshold). The engine ECU may falsely detect an issue with the ATC (After Turbo Catalyst) with the current ECU software. If DTC P0421 is stored in the engine ECU, reprogram the ECU to the latest software level prior to suspecting a fault with the ATC.
Reported code forms
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
Hino
P0421Catalyst efficiency below thresholdCheck vehicle applicability
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Hino | CONVENTIONAL MODELS | 2015 |
| Hino | NE8J | 2015 |
| Hino | NJ8J | 2015 |
| Hino | NV8J | 2015 |