OBD Guide

P238B

Water in Fuel Sensor B Circuit Range/Performance

P238B is an OBD-II diagnostic trouble code meaning: Water in Fuel Sensor B Circuit Range/Performance. 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 Is On
  • Reduced engine performance
  • Problems starting the engine
  • Increased fuel consumption
  • Possible misfires

Causes

  • Water in fuel sensor malfunction
  • Open or short circuit in the sensor circuit
  • Poor contact in sensor connectors
  • Corrosion of contacts or wiring
  • Sensor is contaminated with water or sediment

How to Fix

  1. Check the fuel for water
  2. Inspect the water in fuel sensor and its connections
  3. Check the integrity of the sensor circuit
  4. Clean or replace sensor if necessary
  5. Reset the error code and check if it returns

Related codes

Error P238B by Vehicle Brand

FAQ

What does the P238B code mean?

P238B is an OBD-II diagnostic trouble code that indicates: Water in Fuel Sensor B Circuit Range/Performance

What causes a P238B error code?

The most common causes of P238B include: Water in fuel sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in sensor connectors; Corrosion of contacts or wiring.

How do I fix a P238B diagnostic trouble code?

To fix P238B: Check the fuel for water. Inspect the water in fuel sensor and its connections. Check the integrity of the sensor circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P238B?

Yes, but get it checked soon

How much does it cost to fix P238B?

The estimated repair cost for P238B is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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