B2431
Low Severity (Level 2)Transponder Programming Failed
B2431 usually means transponder Programming Failed.
Can you still drive with B2431?
⚠️Short-distance driving is usually OK, but have this diagnosed within a week to prevent further damage.
Typical repair cost: $80 – $600
Severity Level 2 — Low
This code indicates a minor issue that is unlikely to cause immediate driveability problems. You can typically continue driving but should have the vehicle inspected at your earliest convenience.
Common Symptoms
- Warning light or malfunction indicator related to the module configuration/programming is illuminated
- The module configuration/programming is not operating as designed
- Diagnostic trouble code (DTC) stored in module memory
- Fault may be intermittent — code may clear itself and reappear
- Reduced vehicle functionality related to the module configuration/programming
Possible Causes
- Faulty control module — most common cause, test before replacing
- Damaged or corroded wiring/connector in the module configuration/programming circuit
- Blown fuse or faulty relay for the module configuration/programming
- Poor ground connection — check and clean all related ground points
- Control module fault — rare but possible, only consider after ruling out simpler causes
Common Fixes
- Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($8-121 at shop, free at auto parts store for basic scan)
- Visually inspect the module configuration/programming wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $145 diagnostic fee at shop)
- Replace control module if testing confirms it has failed — use OEM quality, avoid the cheapest no-name aftermarket parts that fail in a year ($80-600)
- Check and replace any blown fuses in the module configuration/programming fuse circuit — if fuse blows again, there's still a short that needs to be found ($1-16 for fuses)
- Perform a wiggle test on the module configuration/programming wiring harness while monitoring live data — see if the fault returns when you move the harness at different points ($0-127 diagnostic labor)
Estimated Repair Cost
These are estimated costs based on generic repair data. Actual costs may vary depending on your vehicle, location, and labor rates.
Frequently Asked Questions
What does B2431 mean?
B2431 stands for "Transponder Programming Failed". B2431 usually means transponder Programming Failed.
Can you drive with B2431?
Short-distance driving is usually OK, but have this diagnosed within a week to prevent further damage.
How much does it cost to fix B2431?
Repair costs for B2431 typically range from $80 to $600, depending on your vehicle make, model, and local labor rates. Common fixes include: Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($8-121 at shop, free at auto parts store for basic scan); Visually inspect the module configuration/programming wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $145 diagnostic fee at shop); Replace control module if testing confirms it has failed — use OEM quality, avoid the cheapest no-name aftermarket parts that fail in a year ($80-600).
Will B2431 clear itself?
Explore Repair Costs
Related OBD-II Codes
These codes are in the same range as B2431 and often share similar causes and fixes.
Worried about repair costs?
Get transparent estimates and verify your mechanic's quote before authorizing repairs.
Related Discussions
See what other car owners are saying about this code and related repairs.
View B2431 discussions in the community