B0122
Low Severity (Level 1)Pedestrian Alert Speaker A
B0122 usually means pedestrian Alert Speaker A.
Can you still drive with B0122?
✅Safe to drive — this is an informational or minor issue. Schedule diagnosis at your convenience.
Typical repair cost: $100 – $1500
Severity Level 1 — 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
- No sound from speakers — or sound cutting in and out
- Radio/infotainment screen blank or frozen
- Diagnostic trouble code (DTC) stored in module memory
- Fault may be intermittent — code may clear itself and reappear
- Reduced vehicle functionality related to the audio/infotainment system
Possible Causes
- Faulty audio module — most common cause, test before replacing
- Damaged or corroded wiring/connector in the audio/infotainment system circuit
- Blown fuse or faulty relay for the audio/infotainment system
- 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 ($0-120 at shop, free at auto parts store for basic scan)
- Visually inspect the audio/infotainment system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $85 diagnostic fee at shop)
- Replace audio module if testing confirms it has failed — use OEM quality, avoid the cheapest no-name aftermarket parts that fail in a year ($100-1500)
- Check and replace any blown fuses in the audio/infotainment system fuse circuit — if fuse blows again, there's still a short that needs to be found ($3-20 for fuses)
- Perform a wiggle test on the audio/infotainment system wiring harness while monitoring live data — see if the fault returns when you move the harness at different points ($0-114 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 B0122 mean?
B0122 stands for "Pedestrian Alert Speaker A". B0122 usually means pedestrian Alert Speaker A.
Can you drive with B0122?
Safe to drive — this is an informational or minor issue. Schedule diagnosis at your convenience.
How much does it cost to fix B0122?
Repair costs for B0122 typically range from $100 to $1500, 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 ($0-120 at shop, free at auto parts store for basic scan); Visually inspect the audio/infotainment system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $85 diagnostic fee at shop); Replace audio module if testing confirms it has failed — use OEM quality, avoid the cheapest no-name aftermarket parts that fail in a year ($100-1500).
Will B0122 clear itself?
B0122 may clear itself after a few drive cycles if the underlying issue was temporary (such as a loose gas cap or minor sensor glitch). However, if the underlying problem persists, the code will return. It's best to have the vehicle diagnosed even if the light goes off.
Explore Repair Costs
Related OBD-II Codes
These codes are in the same range as B0122 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 B0122 discussions in the community