P1056
Valvetronic Supply Voltage Control Motor Low Input
P1056 is an OBD-II diagnostic trouble code meaning: Valvetronic Supply Voltage Control Motor Low Input. Common causes: problems with valvetronic wiring or connectors, valvetronic control motor malfunction. Estimated repair cost: $56–167.
Symptoms
- Unstable engine idling
- Reduced engine power
- Increased fuel consumption
- Check Engine Light Illuminates
- Problems starting the engine
Causes
- Problems with Valvetronic wiring or connectors
- Valvetronic control motor malfunction
- Problems with the engine control unit (ECU)
- Short circuit in control circuit
- Faulty relay or fuse
How to Fix
- Check the condition of the wiring and connectors of the Valvetronic system
- Measure the voltage at the Valvetronic control motor
- Check the operation of the control motor
- Diagnose the engine control unit
- Check system relays and fuses
Related codes
FAQ
What does the P1056 code mean?
P1056 is an OBD-II diagnostic trouble code that indicates: Valvetronic Supply Voltage Control Motor Low Input
What causes a P1056 error code?
The most common causes of P1056 include: Problems with Valvetronic wiring or connectors; Valvetronic control motor malfunction; Problems with the engine control unit (ECU); Short circuit in control circuit.
How do I fix a P1056 diagnostic trouble code?
To fix P1056: Check the condition of the wiring and connectors of the Valvetronic system. Measure the voltage at the Valvetronic control motor. Check the operation of the control motor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1056?
Yes, but get it checked soon
How much does it cost to fix P1056?
The estimated repair cost for P1056 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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