OBD Guide
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P1FDD

Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit Low Voltage

P1FDD is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit Low Voltage. Common causes: voltage sensor fault, open or short circuit in the sensor circuit. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced performance of the hybrid system
  • Battery charging problems
  • The car goes into emergency mode
  • Reducing electric range

Causes

  • Voltage sensor fault
  • Open or short circuit in the sensor circuit
  • Wiring Harness Problems
  • Battery management module malfunction
  • Corrosion or poor contact in connectors

How to Fix

  1. Check the continuity of the voltage sensor circuit
  2. Check connectors and wiring harness for damage
  3. Test the voltage sensor
  4. Check Battery Management Module
  5. Replace faulty components

Related codes

P1FDCP1FDEP0AA6

FAQ

What does the P1FDD code mean?

P1FDD is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Circuit Low Voltage

What causes a P1FDD error code?

The most common causes of P1FDD include: Voltage sensor fault; Open or short circuit in the sensor circuit; Wiring Harness Problems; Battery management module malfunction.

How do I fix a P1FDD diagnostic trouble code?

To fix P1FDD: Check the continuity of the voltage sensor circuit. Check connectors and wiring harness for damage. Test the voltage sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1FDD?

Yes, but get it checked soon

How much does it cost to fix P1FDD?

The estimated repair cost for P1FDD is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat