OBD Guide
ENFRDEESPT

B2A20

Ignition Stuck in Start

B2A20 is an OBD-II diagnostic trouble code meaning: Ignition Stuck in Start. Common causes: faulty starter relay, problems in the ignition system wiring harness. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Difficulty starting the engine
  • The engine may stall after starting
  • Check engine light flashing

Causes

  • Faulty starter relay
  • Problems in the ignition system wiring harness
  • Ignition module failure
  • Short circuit in ignition control circuit
  • Engine ECU malfunction

How to Fix

  1. Check the condition of the starter relay and replace if necessary
  2. Scan the system for other error codes
  3. Check the integrity of the ignition system wiring harness
  4. Check voltage on ignition control circuit
  5. If necessary, replace the ignition module

Related codes

B2A21P0685P0686-protocol converter

FAQ

What does the B2A20 code mean?

B2A20 is an OBD-II diagnostic trouble code that indicates: Ignition Stuck in Start

What causes a B2A20 error code?

The most common causes of B2A20 include: Faulty starter relay; Problems in the ignition system wiring harness; Ignition module failure; Short circuit in ignition control circuit.

How do I fix a B2A20 diagnostic trouble code?

To fix B2A20: Check the condition of the starter relay and replace if necessary. Scan the system for other error codes. Check the integrity of the ignition system wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2A20?

Limited driving only, diagnose soon

How much does it cost to fix B2A20?

The estimated repair cost for B2A20 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat