Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble getting a signal from a sensor that tells it how fast the engine is spinning. It's like if your watch stopped working, you wouldn't know what time it is.
The P0385 code indicates that the Engine Control Module (ECM) has detected a malfunction in the circuit of the Crankshaft Position Sensor B.
The Crankshaft Position Sensor is responsible for monitoring the position and rotational speed of the crankshaft. This information is used by the ECM to control ignition timing and fuel injection. The 'B' circuit refers to a specific sensor or circuit within the system. A fault in this circuit can lead to incorrect engine timing and performance issues.
• Engine misfires
• Engine stalling
• Difficulty starting the engine
• Faulty Crankshaft Position Sensor B
• Damaged or corroded wiring or connectors
• Faulty ECM
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the Crankshaft Position Sensor B for proper operation.
• Replace the Crankshaft Position Sensor B if faulty.
• Repair or replace damaged wiring or connectors.
• Replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$150 - $300
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regularly inspect and maintain engine sensors.
• Keep electrical connections clean and secure.
• Perform regular engine diagnostics.
Sensor Issue
• Do not ignore the check engine light.
• Have the vehicle inspected by a professional mechanic.
• Regularly maintain your vehicle to prevent sensor issues.
Sensor-related repairs may be covered under the vehicle's powertrain warranty.
The P0385 code has been a common issue in vehicles with electronic ignition systems, especially as they age and components wear out.
Moderate – While the vehicle may still run, it could lead to more serious engine problems if not addressed.
Driving with a malfunctioning crankshaft position sensor can lead to unsafe driving conditions. It's important to address this issue promptly.
• Engine at operating temperature
• Vehicle stationary
The Crankshaft Position Sensor is typically located near the bottom of the engine, close to the crankshaft pulley.
Q: Can I drive with a P0385 code?
A: It's not recommended to drive for extended periods with this code as it can lead to engine performance issues.
Q: How can I reset the P0385 code?
A: You can reset the code using an OBD-II scanner, but it's important to fix the underlying issue first.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.
Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
View options on Amazon
Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.