AutoCodes – Generic – C1859

C1859 Code - PRNDL Input Sensor Circuit Failure

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the PRNDL Input Sensor. Common causes include Faulty PRNDL Input Sensor, PRNDL Input Sensor harness is open or shorted, PRNDL Input 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: C1859 indicates PRNDL Input Sensor Circuit Failure.
Common causes: Common causes include Faulty PRNDL Input Sensor, PRNDL Input Sensor harness is open or shorted, PRNDL Input 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 3,905

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1859 Description

The Anti-Lock Brake System (ABS) Module monitors the PRNDL Input Sensor. The ABS Module sets the OBDII code when the PRNDL Input Sensor is not to factory specifications.

OBDII Code C1859 - PRNDL Input Sensor Circuit Failure - AutoCodes.com — C1859 Code - PRNDL Input Sensor Circuit Failure

What does this mean?

What are the Possible Causes of the DTC C1859?

Faulty PRNDL Input Sensor
PRNDL Input Sensor harness is open or shorted
PRNDL Input Sensor circuit poor electrical connection

How to Fix the DTC C1859?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1859 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.

Need more information about the C1859 code?

Need more information on how to fix the C1859 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1859 code diagnosed by a professional: Find a repair shop in your area

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 C1859 Code

1. What are the common symptoms of OBDII code C1859 (PRNDL Input Sensor Circuit Failure)?

The common symptoms of this code include difficulty shifting gears, inaccurate display on the gear indicator, and an illuminated check engine light.

2. What are the possible causes of OBDII code C1859?

Possible causes of this code include a faulty PRNDL input sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning transmission control module.

3. How serious is the PRNDL Input Sensor Circuit Failure issue?

While the vehicle may still be operable with this issue, it is important to address it promptly to prevent further transmission problems and ensure proper gear shifting.

4. Can I continue driving my vehicle with OBDII code C1859?

It is not recommended to continue driving your vehicle with this code present, as it can lead to transmission issues and potentially unsafe driving conditions.

5. How can I diagnose OBDII code C1859 at home?

You can start by checking the wiring and connectors related to the PRNDL input sensor for any visible damage or loose connections. If you have a multimeter, you can also test the sensor's resistance to determine if it is faulty.

6. Is it possible to repair OBDII code C1859 myself?

Depending on your mechanical skills and access to tools, you may be able to repair this issue yourself by replacing the PRNDL input sensor or repairing any damaged wiring. However, it is recommended to consult a professional if you are unsure.

7. How much does it cost to fix OBDII code C1859?

The cost of fixing this issue can vary depending on the extent of the problem, the labor rates in your area, and the cost of parts. It is advisable to get a diagnostic and repair estimate from a trusted mechanic.

8. Can a PRNDL Input Sensor Circuit Failure be prevented?

While some cases of this issue may be due to normal wear and tear, regular maintenance of the transmission system and prompt attention to any warning signs can help prevent this code from occurring.

9. Will resetting the OBDII code C1859 make it go away permanently?

Resetting the code may temporarily clear the check engine light, but if the underlying issue is not addressed, the code is likely to return. It is crucial to diagnose and repair the root cause of the problem.

10. How long does it typically take to repair OBDII code C1859?

The repair time for this code can vary depending on the complexity of the issue and the availability of parts. In some cases, it can be resolved within a few hours, while more extensive repairs may take longer.