Reference meaning
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.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
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.
Scan worksheet →Manufacturer communications
6Original wording in English
VOLVO
P21CA00 And Other Power Faults Leading To Communication Faults And SCR Inducement (Derate)
MACK
P21CA00 And Other Power Faults Leading To Communication Faults And SCR Inducement (Derate)
VOLVO
P21CA00 And Other Power Faults Leading To Communication Faults And SCR Inducement (Derate)
VOLVO
P21CA00 And Other Power Faults Leading To Communication Faults And SCR Inducement (Derate)
Check vehicle applicability
43A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
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.