OBD Guide
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P1EF6

Battery Charger Control Module Ignition On/Start Switch Circuit Low Voltage

P1EF6 is an OBD-II diagnostic trouble code meaning: Battery Charger Control Module Ignition On/Start Switch Circuit Low Voltage. Common causes: wiring harness damage, poor contact in connectors. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Check engine light comes on
  • Problems starting the engine
  • Reduced battery charging efficiency
  • Irregular operation of the hybrid system
  • Power Loss

Causes

  • Wiring harness damage
  • Poor contact in connectors
  • Battery charging control module malfunction
  • Problems with the ignition relay
  • Short circuit in the circuit

How to Fix

  1. Check the integrity of the wiring harness
  2. Inspect and clean connector contacts
  3. Check the voltage in the ignition circuit
  4. Test the battery charging control module
  5. Replace faulty components

Related codes

P1EF5P1EF7P0AA6

FAQ

What does the P1EF6 code mean?

P1EF6 is an OBD-II diagnostic trouble code that indicates: Battery Charger Control Module Ignition On/Start Switch Circuit Low Voltage

What causes a P1EF6 error code?

The most common causes of P1EF6 include: Wiring harness damage; Poor contact in connectors; Battery charging control module malfunction; Problems with the ignition relay.

How do I fix a P1EF6 diagnostic trouble code?

To fix P1EF6: Check the integrity of the wiring harness. Inspect and clean connector contacts. Check the voltage in the ignition circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1EF6?

Yes, but get it checked soon

How much does it cost to fix P1EF6?

The estimated repair cost for P1EF6 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat