B2890
DC/DC Converter
B2890 is an OBD-II diagnostic trouble code meaning: DC/DC Converter. Common causes: malfunction of the dc/dc converter itself, problems with wiring harness or contacts. Estimated repair cost: $167–556.
Symptoms
- Unstable operation of electrical equipment
- Warning messages on the dashboard
- Problems starting the engine
- Reduced hybrid system efficiency
Causes
- Malfunction of the DC/DC converter itself
- Problems with wiring harness or contacts
- Short circuit in the circuit
- Control unit malfunction
- Problems with the high-voltage battery (in hybrids)
How to Fix
- Carry out diagnostics of the high voltage system (by specialists only)
- Check the integrity of the wiring harness and contacts
- Test the DC/DC converter
- Replace the converter if necessary
- Reset the error and check the system
Related codes
FAQ
What does the B2890 code mean?
B2890 is an OBD-II diagnostic trouble code that indicates: DC/DC Converter
What causes a B2890 error code?
The most common causes of B2890 include: Malfunction of the DC/DC converter itself; Problems with wiring harness or contacts; Short circuit in the circuit; Control unit malfunction.
How do I fix a B2890 diagnostic trouble code?
To fix B2890: Carry out diagnostics of the high voltage system (by specialists only). Check the integrity of the wiring harness and contacts. Test the DC/DC converter. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B2890?
Limited driving only, diagnose soon
How much does it cost to fix B2890?
The estimated repair cost for B2890 is $167–556. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat