AutoCodes – Acura – P0389 Acura

P0389 Acura Code - Crankshaft Position Sensor 'B' Intermittent Interruption

Quick Answer

The Crankshaft position sensor also known as the crank position sensor is an electronic device used in an engine to record the rate at which the crankshaft is spinning. Common causes include Faulty crankshaft position sensor, Crankshaft position sensor harness is open or shorted, Crankshaft position sensor circuit poor electrical connection. 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: P0389 Acura indicates Crankshaft Position Sensor 'B' Intermittent Interruption.
Common causes: Common causes include Faulty crankshaft position sensor, Crankshaft position sensor harness is open or shorted, Crankshaft position sensor circuit poor electrical connection.
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.

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Code Popularity 12,277

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0389 Acura Description

The Crankshaft position sensor also known as the crank position sensor is an electronic device used in an engine to record the rate at which the crankshaft is spinning. This information is used by the Electronic Control Module (ECM) to control ignition and fuel injection. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor.
When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.

OBDII Code P0389 Acura - Crankshaft Position Sensor 'B' Intermittent Interruption - AutoCodes.com — P0389 Acura Code - Crankshaft Position Sensor 'B' Intermittent Interruption

What does this mean?

What are the Possible Causes of the DTC P0389 Acura?

Faulty crankshaft position sensor
Crankshaft position sensor harness is open or shorted
Crankshaft position sensor circuit poor electrical connection
Signal plate may be damage
Starter motor may be faulty
Starting system circuit
Dead or weak battery

How to Fix the DTC P0389 Acura?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0389 Acura code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 P0389 Acura Code

1. What does the OBDII code P0389 mean on an Acura?

P0389 indicates an intermittent interruption in the signal from the Crankshaft Position Sensor 'B,' which is responsible for monitoring the crankshaft's position and speed.

2. What are the common symptoms of code P0389 on an Acura?

Symptoms may include engine misfires, stalling, difficulty starting, rough idling, poor acceleration, and the Check Engine Light illuminating.

3. What causes the P0389 code to appear on an Acura?

Common causes include a faulty Crankshaft Position Sensor 'B,' damaged wiring or connectors, a misaligned sensor, or issues with the engine control module (ECM).

4. Can I drive my Acura with the P0389 code active?

It is not recommended to drive with this code active, as it can lead to engine stalling or other unsafe conditions, potentially causing further damage.

5. How do I diagnose the P0389 code on my Acura?

Check the wiring and connectors for damage or corrosion, inspect the Crankshaft Position Sensor 'B' for wear, and use a multimeter to test the sensor's resistance and voltage.

6. How do I fix the P0389 code on an Acura?

Repairs may include replacing the Crankshaft Position Sensor 'B,' repairing or replacing damaged wiring, or addressing any faults in the ECM.

7. How much does it cost to fix the P0389 code on an Acura?

The cost varies but typically ranges from $150 to $300, depending on whether only the sensor needs replacement or additional wiring or ECM repairs are required.

8. What happens if the P0389 code is ignored?

Ignoring the code can result in worsening engine performance, stalling, difficulty starting, or even long-term engine damage.

9. Can a dead battery cause the P0389 code on an Acura?

While a dead battery is unlikely to directly cause this code, issues with the electrical system, such as low voltage or poor connections, can contribute to intermittent sensor signals.

10. Is the P0389 code specific to Acura vehicles?

No, the P0389 code is a generic OBDII code that can appear on many vehicles, but the diagnostic and repair steps may vary depending on the make and model.