OBD Guide
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B212C

Ignition Run/Start Input Circuit Open

B212C is an OBD-II diagnostic trouble code meaning: Ignition Run/Start Input Circuit Open. Common causes: broken or damaged wiring harness, oxidized or corroded contacts. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Problems starting the engine
  • Incorrect operation of airbags
  • Check Engine Light Is On
  • Unstable idle

Causes

  • Broken or damaged wiring harness
  • Oxidized or corroded contacts
  • Faulty ignition relay
  • Damaged control unit

How to Fix

  1. Check wiring harness for damage
  2. Inspect and clean contacts
  3. Check ignition relay
  4. Scan the control unit for errors

Related codes

B212BB212DP0685

FAQ

What does the B212C code mean?

B212C is an OBD-II diagnostic trouble code that indicates: Ignition Run/Start Input Circuit Open

What causes a B212C error code?

The most common causes of B212C include: Broken or damaged wiring harness; Oxidized or corroded contacts; Faulty ignition relay; Damaged control unit.

How do I fix a B212C diagnostic trouble code?

To fix B212C: Check wiring harness for damage. Inspect and clean contacts. Check ignition relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B212C?

Limited driving only, diagnose soon

How much does it cost to fix B212C?

The estimated repair cost for B212C is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat