AutoCodes – Generic – P1789

P1789 Code - 3-2 Timing/Coast Clutch Solenoid Circuit Shorted Conditions

Quick Answer

With the engine running in gear at cruise speed, the Powertrain Control Module (PCM) receives a signal that the 3-2 Timing or coast clutch solenoid circuit had a shorted circuit. Common causes include Faulty Coast Clutch Solenoid, Coast Clutch Solenoid harness is open or shorted, Coast Clutch Solenoid 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: P1789 indicates 3-2 Timing/Coast Clutch Solenoid Circuit Shorted Conditions.
Common causes: Common causes include Faulty Coast Clutch Solenoid, Coast Clutch Solenoid harness is open or shorted, Coast Clutch Solenoid 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 19,358

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 Sep 19, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1789 Description

With the engine running in gear at cruise speed, the Powertrain Control Module (PCM) receives a signal that the 3-2 Timing or coast clutch solenoid circuit had a shorted circuit.

OBDII Code P1789 - 3-2 Timing/Coast Clutch Solenoid Circuit Shorted Conditions - AutoCodes.com — P1789 Code - 3-2 Timing/Coast Clutch Solenoid Circuit Shorted Conditions

What does this mean?

What are the Possible Causes of the DTC P1789?

Faulty Coast Clutch Solenoid
Coast Clutch Solenoid harness is open or shorted
Coast Clutch Solenoid circuit poor electrical connection

How to Fix the DTC P1789?

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 P1789 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 P1789 code?

Need more information on how to fix the P1789 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1789 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1789 Ford — 3-2 Timing/Coast Clutch Solenoid Circuit Shorted Conditions
P1789 Mazda — 3-2 Timing/Coast Clutch Solenoid Circuit Shorted Conditions

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 P1789 Code

1. What are the common symptoms of OBDII code P1789 (3-2 Timing/Coast Clutch Solenoid Circuit Shorted Conditions)?

- Common symptoms include rough shifting, transmission slipping, decreased fuel efficiency, and the transmission going into limp mode.

2. What are the possible causes of OBDII code P1789?

- Possible causes include a faulty 3-2 timing/coast clutch solenoid, damaged wiring or connectors in the solenoid circuit, or a short circuit in the solenoid circuit.

3. How can I diagnose OBDII code P1789?

- Diagnosis involves using a scan tool to read the code, checking the wiring and connectors for damage, and testing the 3-2 timing/coast clutch solenoid for proper operation.

4. Can I continue driving my vehicle with OBDII code P1789?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the transmission if left unresolved.

5. How can I repair OBDII code P1789?

- Repair typically involves replacing the faulty 3-2 timing/coast clutch solenoid, repairing any damaged wiring or connectors, and clearing the code with a scan tool.

6. Is it possible to reset OBDII code P1789 without making any repairs?

- While you can clear the code with a scan tool, it is important to address the underlying issue causing the code to prevent further transmission problems.

7. How much does it cost to repair OBDII code P1789 at a mechanic?

- The cost of repair can vary depending on the specific cause of the code, but it may range from $200 to $500 for parts and labor.

8. Can a DIY enthusiast fix OBDII code P1789 at home?

- If you have the necessary tools and knowledge, you may be able to replace the 3-2 timing/coast clutch solenoid and repair the wiring yourself. However, it is recommended to consult a professional if you are unsure.

9. Will OBDII code P1789 cause permanent damage to my vehicle if not addressed promptly?

- Ignoring this code can lead to further transmission issues and potentially cause permanent damage if the underlying problem is not resolved in a timely manner.

10. How long does it typically take to repair OBDII code P1789?

- The repair process can vary depending on the extent of the issue and the availability of parts, but it may take a few hours to a day to complete the repair.