OBD Guide
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P1066

Cylinder 1 Oil Supply Solenoid Valve Switch OFF Time Out Of Range

P1066 is an OBD-II diagnostic trouble code meaning: Cylinder 1 Oil Supply Solenoid Valve Switch OFF Time Out Of Range. Common causes: oil supply solenoid valve malfunction, problems with wiring to the solenoid. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Check Engine light comes on
  • Slight reduction in engine power
  • Increased oil consumption
  • Unstable engine idling
  • Engine noise

Causes

  • Oil supply solenoid valve malfunction
  • Problems with wiring to the solenoid
  • Low oil level or poor quality
  • Oil passages are dirty
  • Engine ECU malfunction

How to Fix

  1. Check the level and condition of the engine oil
  2. Check the integrity of the wiring to the solenoid valve
  3. Test solenoid resistance
  4. Clean or replace solenoid valve
  5. If necessary, replace the engine ECU

Related codes

P1065P1067P1068

FAQ

What does the P1066 code mean?

P1066 is an OBD-II diagnostic trouble code that indicates: Cylinder 1 Oil Supply Solenoid Valve Switch OFF Time Out Of Range

What causes a P1066 error code?

The most common causes of P1066 include: Oil supply solenoid valve malfunction; Problems with wiring to the solenoid; Low oil level or poor quality; Oil passages are dirty.

How do I fix a P1066 diagnostic trouble code?

To fix P1066: Check the level and condition of the engine oil. Check the integrity of the wiring to the solenoid valve. Test solenoid resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1066?

Yes, but get it checked soon

How much does it cost to fix P1066?

The estimated repair cost for P1066 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat