OBD Guide
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B2271

Ignition Hold Monitor Malfunction

B2271 is an OBD-II diagnostic trouble code meaning: Ignition Hold Monitor Malfunction. Common causes: faulty ignition coils, worn spark plugs. Estimated repair cost: $56–167.

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

Symptoms

  • Misfires
  • Loss of engine power
  • Increased fuel consumption
  • Check Engine Light Is On
  • Unstable idling

Causes

  • Faulty ignition coils
  • Worn spark plugs
  • Damaged wiring harness
  • Problems with the engine control unit (ECU)
  • Malfunction of the crankshaft position sensor

How to Fix

  1. Check the condition of the spark plugs and replace if necessary
  2. Check the ignition coils for breakdown
  3. Inspect the wiring harness for damage
  4. Check the voltage in the ignition circuit
  5. Scan the system for other ignition-related errors
  6. If necessary, replace the engine control unit

Related codes

P0300P0301P0351P0352

FAQ

What does the B2271 code mean?

B2271 is an OBD-II diagnostic trouble code that indicates: Ignition Hold Monitor Malfunction

What causes a B2271 error code?

The most common causes of B2271 include: Faulty ignition coils; Worn spark plugs; Damaged wiring harness; Problems with the engine control unit (ECU).

How do I fix a B2271 diagnostic trouble code?

To fix B2271: Check the condition of the spark plugs and replace if necessary. Check the ignition coils for breakdown. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2271?

Limited driving only, diagnose soon

How much does it cost to fix B2271?

The estimated repair cost for B2271 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat