OBD Guide

U356A

Anode Drain Valve Control Circuit

U356A is an OBD-II diagnostic trouble code meaning: Anode Drain Valve Control Circuit. Common causes: open or short circuit in control circuit, anode drain valve malfunction. 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 Is On
  • Increased fuel consumption
  • Problems starting the engine
  • Smell of gasoline in the cabin
  • Unstable engine idling

Causes

  • Open or short circuit in control circuit
  • Anode drain valve malfunction
  • Wiring Harness Problems
  • Contact corrosion
  • Engine control unit malfunction

How to Fix

  1. Check the integrity of the control circuit
  2. Test valve resistance
  3. Inspect the wiring harness for damage
  4. Clean contacts from corrosion
  5. Replace faulty valve if necessary

Related codes

Error U356A by Vehicle Brand

FAQ

What does the U356A code mean?

U356A is an OBD-II diagnostic trouble code that indicates: Anode Drain Valve Control Circuit

What causes a U356A error code?

The most common causes of U356A include: Open or short circuit in control circuit; Anode drain valve malfunction; Wiring Harness Problems; Contact corrosion.

How do I fix a U356A diagnostic trouble code?

To fix U356A: Check the integrity of the control circuit. Test valve resistance. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U356A?

Yes, but get it checked soon

How much does it cost to fix U356A?

The estimated repair cost for U356A is $17–56. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat