What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer communications
7Original wording in English
VOLVO
Reported code forms P04D900
This is a Technical Journal: Check engine light and DTC - ECM P04D900. Clear the DTC and check if the vehicle software is the latest version
VOLVO
Reported code forms P04D900
This is a Technical Journal: Check engine light and DTC - ECM P04D900. Clear the DTC and check if the vehicle software is the latest version
VOLVO
Reported code forms P04D900
This is a Technical Journal: Check engine light and DTC - ECM P04D900. Clear the DTC and check if the vehicle software is the latest version
MACK
Reported code forms P04D9
EGR Fault Codes / Diagnostic Trouble Codes ( DTC's ) SPN 412 FMI 0,2,5, SPN 4752 FMI 7, SPN 2659 FMI 18 / P040A, P040B, P1121, P2457, P0401, P04D9
VOLVO
Reported code forms P04D9
EGR Fault Codes / Diagnostic Trouble Codes ( DTC's ) SPN 412 FMI 0,2,5, SPN 4752 FMI 7, SPN 2659 FMI 18 / P040A, P040B, P1121, P2457, P0401, P04D9
RAM
Reported code forms P04D9
Flash: 3.0L Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. A small number of customers may experience a…
Check vehicle applicability
28A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Mack | MACK | Year not specified |
| Ram | PROMASTER | 2015 |
| Volvo | S90MHEV | 2025 |
| Volvo | S90MHEV | 2024 |
| Volvo | S90MHEV | 2023 |
| Volvo | S90MHEV | 2022 |
| Volvo | V90CCMHEV | 2025 |
| Volvo | V90CCMHEV | 2024 |
| Volvo | V90CCMHEV | 2023 |
| Volvo | V90CCMHEV | 2022 |
| Volvo | VAH | Year not specified |
| Volvo | VHD | Year not specified |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.