OBD Guide
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C211B

Ignition Run/Start Input

C211B is an OBD-II diagnostic trouble code meaning: Ignition Run/Start Input. Common causes: open or short circuit in wiring harness, poor contact in connectors. Estimated repair cost: $56–222.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • Problems starting the engine
  • Sudden engine stop
  • Switching to emergency mode
  • Check Engine Light Flashing

Causes

  • Open or short circuit in wiring harness
  • Poor contact in connectors
  • Ignition switch malfunction
  • Problems with the engine control unit

How to Fix

  1. Check the integrity of the wiring harness
  2. Clean and check contacts in connectors
  3. Check the condition of the ignition switch
  4. Replace faulty components
  5. If necessary, reflash the ECU

Related codes

P0351P0352P0353

FAQ

What does the C211B code mean?

C211B is an OBD-II diagnostic trouble code that indicates: Ignition Run/Start Input

What causes a C211B error code?

The most common causes of C211B include: Open or short circuit in wiring harness; Poor contact in connectors; Ignition switch malfunction; Problems with the engine control unit.

How do I fix a C211B diagnostic trouble code?

To fix C211B: Check the integrity of the wiring harness. Clean and check contacts in connectors. Check the condition of the ignition switch. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C211B?

Limited driving only, diagnose soon

How much does it cost to fix C211B?

The estimated repair cost for C211B is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat