OBD Guide
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P150D

Supply Voltage Circuit 2 Low Voltage

P150D is an OBD-II diagnostic trouble code meaning: Supply Voltage Circuit 2 Low Voltage. Common causes: weak or dead battery, generator malfunction. Estimated repair cost: $6–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • The Check Engine light comes on
  • Problems starting the engine
  • Unstable engine operation at idle
  • Reduced engine power
  • Increased fuel consumption

Causes

  • Weak or dead battery
  • Generator malfunction
  • Damaged or corroded wires
  • Poor contact in connectors
  • Faulty relay or fuse

How to Fix

  1. Check battery voltage
  2. Test the operation of the generator
  3. Inspect the wiring harness for damage
  4. Check connections and connectors
  5. Replace faulty relays or fuses

Related codes

P0562P0563P150A

FAQ

What does the P150D code mean?

P150D is an OBD-II diagnostic trouble code that indicates: Supply Voltage Circuit 2 Low Voltage

What causes a P150D error code?

The most common causes of P150D include: Weak or dead battery; Generator malfunction; Damaged or corroded wires; Poor contact in connectors.

How do I fix a P150D diagnostic trouble code?

To fix P150D: Check battery voltage. Test the operation of the generator. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P150D?

Limited driving only, diagnose soon

How much does it cost to fix P150D?

The estimated repair cost for P150D is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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