OBD Guide
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P1055

Valvetronic Supply Voltage Control Motor High Input

P1055 is an OBD-II diagnostic trouble code meaning: Valvetronic Supply Voltage Control Motor High Input. Common causes: valvetronic motor malfunction, damaged wiring harness or contacts. Estimated repair cost: $167–444.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$167–444 (est.)

Symptoms

  • Unstable engine idling
  • Reduced engine power
  • Increased fuel consumption
  • Check Engine Light Illuminates
  • Problems starting the engine

Causes

  • Valvetronic motor malfunction
  • Damaged wiring harness or contacts
  • Problems with the engine control unit
  • Mechanical jamming of the Valvetronic system
  • Short circuit in control circuit

How to Fix

  1. Check the condition of the wiring and connectors of the Valvetronic system
  2. Measure the resistance of the Valvetronic motor
  3. Check control circuit voltage
  4. Diagnose the engine control unit
  5. If necessary, replace the Valvetronic motor

Related codes

P1054P1056P1057

FAQ

What does the P1055 code mean?

P1055 is an OBD-II diagnostic trouble code that indicates: Valvetronic Supply Voltage Control Motor High Input

What causes a P1055 error code?

The most common causes of P1055 include: Valvetronic motor malfunction; Damaged wiring harness or contacts; Problems with the engine control unit; Mechanical jamming of the Valvetronic system.

How do I fix a P1055 diagnostic trouble code?

To fix P1055: Check the condition of the wiring and connectors of the Valvetronic system. Measure the resistance of the Valvetronic motor. Check control circuit voltage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1055?

Yes, but get it checked soon

How much does it cost to fix P1055?

The estimated repair cost for P1055 is $167–444. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat