P143B
Reductant Control System Information Signal Message Counter Incorrect
P143B is an OBD-II diagnostic trouble code meaning: Reductant Control System Information Signal Message Counter Incorrect. Common causes: problems with the can bus (open or short circuit), scr control module malfunction. Estimated repair cost: $56–278.
Symptoms
- Check Engine light comes on
- Possible engine power limitation
- Increased consumption of AdBlue reductant
- SCR system error message on dashboard
Causes
- Problems with the CAN bus (open or short circuit)
- SCR control module malfunction
- Software error in the control unit
- Damage to the reduction gear system wiring harness
- SCR Module Power Problems
How to Fix
- Check the integrity of the CAN bus and connections
- Read decrypted error codes from the SCR module
- Check the supply voltage of the SCR module
- Update control unit software
- If necessary, replace the SCR control module
Related codes
FAQ
What does the P143B code mean?
P143B is an OBD-II diagnostic trouble code that indicates: Reductant Control System Information Signal Message Counter Incorrect
What causes a P143B error code?
The most common causes of P143B include: Problems with the CAN bus (open or short circuit); SCR control module malfunction; Software error in the control unit; Damage to the reduction gear system wiring harness.
How do I fix a P143B diagnostic trouble code?
To fix P143B: Check the integrity of the CAN bus and connections. Read decrypted error codes from the SCR module. Check the supply voltage of the SCR module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P143B?
Yes, but get it checked soon
How much does it cost to fix P143B?
The estimated repair cost for P143B is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat