OBD Guide
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B2274

ACC Monitor Malfunction

B2274 is an OBD-II diagnostic trouble code meaning: ACC Monitor Malfunction. Common causes: radar or acc camera malfunction, damage to the acc wiring harness. Estimated repair cost: $56–333.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–333 (est.)

Symptoms

  • Disabling adaptive cruise control
  • A warning appears on the instrument panel
  • Inability to activate ACC

Causes

  • Radar or ACC camera malfunction
  • Damage to the ACC wiring harness
  • ACC control unit software error
  • Contaminated or incorrectly adjusted sensors
  • ACC power problems

How to Fix

  1. Check and clean ACC sensors (radar, cameras)
  2. Inspect the wiring harness for damage
  3. Check connections and contacts of the ACC system
  4. Perform diagnostics on the ACC control unit
  5. If necessary, replace faulty components
  6. Update control unit software

Related codes

C1234U0121B2280

FAQ

What does the B2274 code mean?

B2274 is an OBD-II diagnostic trouble code that indicates: ACC Monitor Malfunction

What causes a B2274 error code?

The most common causes of B2274 include: Radar or ACC camera malfunction; Damage to the ACC wiring harness; ACC control unit software error; Contaminated or incorrectly adjusted sensors.

How do I fix a B2274 diagnostic trouble code?

To fix B2274: Check and clean ACC sensors (radar, cameras). Inspect the wiring harness for damage. Check connections and contacts of the ACC system. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2274?

Limited driving only, diagnose soon

How much does it cost to fix B2274?

The estimated repair cost for B2274 is $56–333. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat