OBD Guide

P238C

Water in Fuel Sensor B Circuit Low

P238C is an OBD-II diagnostic trouble code meaning: Water in Fuel Sensor B Circuit Low. Common causes: water in fuel sensor malfunction, open or short circuit in the sensor circuit. 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
  • Reduced engine power
  • Increased fuel consumption
  • Unstable engine operation
  • Difficulty starting the engine

Causes

  • Water in fuel sensor malfunction
  • Open or short circuit in the sensor circuit
  • Poor contact in the sensor connector
  • Problems with the engine control unit (ECU)
  • Presence of water in the fuel tank

How to Fix

  1. Check for water in the fuel tank
  2. Inspect the sensor wiring and connectors
  3. Check sensor resistance
  4. Replace the water in fuel sensor if necessary
  5. Clean the fuel system from water

Related codes

Error P238C by Vehicle Brand

FAQ

What does the P238C code mean?

P238C is an OBD-II diagnostic trouble code that indicates: Water in Fuel Sensor B Circuit Low

What causes a P238C error code?

The most common causes of P238C include: Water in fuel sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Problems with the engine control unit (ECU).

How do I fix a P238C diagnostic trouble code?

To fix P238C: Check for water in the fuel tank. Inspect the sensor wiring and connectors. Check sensor resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P238C?

Yes, but get it checked soon

How much does it cost to fix P238C?

The estimated repair cost for P238C is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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