Engine-Codes.com
Engine-Codes – Generic – P0385

P0385 Code - Crankshaft Position Sensor 'B' Circuit

Quick Answer

The P0385 diagnostic trouble code (DTC) relates to the crankshaft position sensor 'B' circuit in the vehicle. Common causes include Faulty crankshaft position sensor 'B', Damaged or corroded wiring in the sensor circuit, Issues with the PCM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0385 indicates Crankshaft Position Sensor 'B' Circuit.
Common causes
Common causes include Faulty crankshaft position sensor 'B', Damaged or corroded wiring in the sensor circuit, Issues with the PCM.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0385 Description

The P0385 diagnostic trouble code (DTC) relates to the crankshaft position sensor 'B' circuit in the vehicle. The crankshaft position sensor is a vital component in the engine management system as it monitors the position and rotational speed of the crankshaft, providing crucial data for ignition timing and fuel injection. Sensor 'B' refers to the secondary crankshaft position sensor in vehicles with dual sensors. When this sensor circuit encounters a fault, it can lead to various issues that affect the vehicle's overall performance and drivability.

OBDII Code P0385 - Crankshaft Position Sensor 'B' Circuit
P0385 Code - Crankshaft Position Sensor 'B' Circuit

Common Causes of P0385

  1. Faulty crankshaft position sensor 'B'
  2. Damaged or corroded wiring in the sensor circuit
  3. Issues with the PCM
  4. Poor electrical connections
  5. Mechanical problems affecting the sensor's operation

Symptoms of P0385

  1. Engine misfires or rough idling
  2. Difficulty starting the engine
  3. Reduced fuel efficiency
  4. Engine stalling
  5. Illumination of the check engine light

How to Fix P0385

  1. Begin by diagnosing the specific cause of the P0385 code using a diagnostic scanner to pinpoint the faulty component.
  2. Inspect the wiring and connections associated with the crankshaft position sensor 'B' circuit for any damage or corrosion. Repair or replace as necessary.
  3. Test the crankshaft position sensor 'B' using a multimeter to ensure it is functioning correctly. Replace the sensor if it is found to be faulty.
  4. Clear the DTC from the PCM and perform a road test to verify that the issue has been resolved.
  5. If the problem persists, further troubleshooting may be required to identify any underlying issues with the engine management system.

Cost to Fix P0385

The cost of repairing a P0385 code can vary depending on the specific cause of the issue and the vehicle's make and model. Generally, replacing a crankshaft position sensor 'B' can cost between $100 and $200, including parts and labor. However, additional costs may apply if wiring repairs or PCM diagnostics are needed. It is advisable to consult with a professional mechanic to obtain a more accurate estimate based on your vehicle's requirements and location. Keep in mind that labor rates can vary, so it's essential to inquire about pricing upfront.

What does this mean?

Tech Notes for P0385

Sometimes and in some models, low battery voltage or a weak starter can trigger a Crankshaft Position Sensor code. Before replacing any parts, recharge or replaced battery.

When is the Code Detected?

The crankshaft position sensor (POS) signal is sent to the Electronic Control Module (ECM) during the first few seconds of engine cranking is out of range

Need more information about the P0385 code?

Need more information on how to fix the P0385 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0385 code diagnosed by a professional: Find a repair shop in your area

Code P0385 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0385 Code

No Frequently Asked Questions about P0385 Code found.

Discuss the causes and fixes for P0385 OBDII Code

Submit a New Comment

Code P0385 comments

No comments found for this page.