OBD Guide
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P104B

Cylinder 4 Oil Supply Solenoid Valve Voltage Out Of Range

P104B is an OBD-II diagnostic trouble code meaning: Cylinder 4 Oil Supply Solenoid Valve Voltage Out Of Range. Common causes: oil supply solenoid valve malfunction, open or short circuit in valve circuit. Estimated repair cost: $28–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$28–89 (est.)

Symptoms

  • Check Engine light comes on
  • Unstable engine operation at idle
  • Reduced engine power
  • Increased fuel consumption
  • Possible noise in the timing belt area

Causes

  • Oil supply solenoid valve malfunction
  • Open or short circuit in valve circuit
  • Poor contact in valve connector
  • Wiring Harness Problems
  • Malfunction of the engine control unit (rare)

How to Fix

  1. Check the condition of the oil supply solenoid valve
  2. Check the integrity of the circuit and connectors
  3. Measure valve resistance
  4. Check voltage at valve connector
  5. If necessary, replace the valve or repair the wiring

Related codes

P104AP104CP104D

FAQ

What does the P104B code mean?

P104B is an OBD-II diagnostic trouble code that indicates: Cylinder 4 Oil Supply Solenoid Valve Voltage Out Of Range

What causes a P104B error code?

The most common causes of P104B include: Oil supply solenoid valve malfunction; Open or short circuit in valve circuit; Poor contact in valve connector; Wiring Harness Problems.

How do I fix a P104B diagnostic trouble code?

To fix P104B: Check the condition of the oil supply solenoid valve. Check the integrity of the circuit and connectors. Measure valve resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P104B?

Yes, but get it checked soon

How much does it cost to fix P104B?

The estimated repair cost for P104B is $28–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat