OBD Guide
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B1302

Accessory Delay Relay Coil Circuit Failure

B1302 is an OBD-II diagnostic trouble code meaning: Accessory Delay Relay Coil Circuit Failure. Common causes: faulty delay relay, open circuit or short circuit in the wiring harness. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Accessories do not work after turning off the ignition
  • Loss of power to the radio or headlights
  • False alarms of the security system

Causes

  • Faulty delay relay
  • Open circuit or short circuit in the wiring harness
  • Oxidized contacts
  • Fuse box problems
  • Control unit malfunction

How to Fix

  1. Check circuit fuse
  2. Test the relay (coil resistance 60-120 Ohm)
  3. Inspect the wiring harness for damage
  4. Check contacts in connectors
  5. Replace relay if necessary

Related codes

B1301B1303B1311

FAQ

What does the B1302 code mean?

B1302 is an OBD-II diagnostic trouble code that indicates: Accessory Delay Relay Coil Circuit Failure

What causes a B1302 error code?

The most common causes of B1302 include: Faulty delay relay; Open circuit or short circuit in the wiring harness; Oxidized contacts; Fuse box problems.

How do I fix a B1302 diagnostic trouble code?

To fix B1302: Check circuit fuse. Test the relay (coil resistance 60-120 Ohm). Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1302?

Yes, but get it checked soon

How much does it cost to fix B1302?

The estimated repair cost for B1302 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat