OBD Guide
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P1045

Cylinder 1 Oil Supply Solenoid Valve Voltage Out Of Range

P1045 is an OBD-II diagnostic trouble code meaning: Cylinder 1 Oil Supply Solenoid Valve Voltage Out Of Range. Common causes: open or short circuit in wiring harness, corrosion of electrical contacts. Estimated repair cost: $17–50.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–50 (est.)

Symptoms

  • Check Engine light comes on
  • Possible engine noise due to insufficient lubrication
  • Reduced engine performance
  • Increased oil consumption
  • Unstable engine operation at idle

Causes

  • Open or short circuit in wiring harness
  • Corrosion of electrical contacts
  • Solenoid valve malfunction
  • Problems with the engine control unit
  • Poor ground connection

How to Fix

  1. Check the condition of the valve wiring harness
  2. Check contacts for corrosion
  3. Measure valve resistance
  4. Check the output voltage from the ECU
  5. Replace faulty solenoid valve if necessary

Related codes

P1040P1046P1047

FAQ

What does the P1045 code mean?

P1045 is an OBD-II diagnostic trouble code that indicates: Cylinder 1 Oil Supply Solenoid Valve Voltage Out Of Range

What causes a P1045 error code?

The most common causes of P1045 include: Open or short circuit in wiring harness; Corrosion of electrical contacts; Solenoid valve malfunction; Problems with the engine control unit.

How do I fix a P1045 diagnostic trouble code?

To fix P1045: Check the condition of the valve wiring harness. Check contacts for corrosion. Measure valve resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1045?

Limited driving only, diagnose soon

How much does it cost to fix P1045?

The estimated repair cost for P1045 is $17–50. Actual cost depends on your vehicle, location, and labor rates.

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