OBD Guide
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P1F20

Generator Motor Inverter Power Supply Voltage Low

P1F20 is an OBD-II diagnostic trouble code meaning: Generator Motor Inverter Power Supply Voltage Low. Common causes: generator inverter fault, problems with power connections. Estimated repair cost: $56–222.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • Charge warning on dashboard
  • Hybrid system power reduction
  • Problems starting the engine
  • Unstable operation of the vehicle's electrical systems

Causes

  • Generator inverter fault
  • Problems with power connections
  • Battery fault
  • Defective wiring harness

How to Fix

  1. Check the voltage at the battery terminals
  2. Inspect the connections and connectors of the inverter
  3. Check the integrity of the wiring harness
  4. Diagnose generator inverter

Related codes

P1F21P1F22P1F23

FAQ

What does the P1F20 code mean?

P1F20 is an OBD-II diagnostic trouble code that indicates: Generator Motor Inverter Power Supply Voltage Low

What causes a P1F20 error code?

The most common causes of P1F20 include: Generator inverter fault; Problems with power connections; Battery fault; Defective wiring harness.

How do I fix a P1F20 diagnostic trouble code?

To fix P1F20: Check the voltage at the battery terminals. Inspect the connections and connectors of the inverter. Check the integrity of the wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1F20?

Yes, but get it checked soon

How much does it cost to fix P1F20?

The estimated repair cost for P1F20 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat