AutoCodes – Generic – P1788

P1788 Code - 3-2 Timing/Coast Clutch Solenoid Circuit Open 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 an open circuit condition. 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: P1788 indicates 3-2 Timing/Coast Clutch Solenoid Circuit Open 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 25,159

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 P1788 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 an open circuit condition.

OBDII Code P1788 - 3-2 Timing/Coast Clutch Solenoid Circuit Open Conditions - AutoCodes.com — P1788 Code - 3-2 Timing/Coast Clutch Solenoid Circuit Open Conditions

What does this mean?

What are the Possible Causes of the DTC P1788?

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

How to Fix the DTC P1788?

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 P1788 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 P1788 code?

Need more information on how to fix the P1788 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1788 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1788 Acura — Automatic Transmission Poor Gear Shift
P1788 Ford — 3-2 Timing/Coast Clutch Solenoid Circuit Open Conditions
P1788 Honda — Automatic Transmission Poor Gear Shift
P1788 Isuzu — Automatic Transmission Poor Gear Shift
P1788 Mazda — 3-2 Timing/Coast Clutch Solenoid Circuit Open 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 P1788 Code

1. What are the common symptoms of OBDII code P1788?

The common symptoms of OBDII code P1788 include harsh shifting, transmission slipping, and the transmission not engaging properly.

2. What does the OBDII code P1788 indicate?

OBDII code P1788 indicates a 3-2 Timing/Coast Clutch Solenoid Circuit Open Conditions, which means there is an issue with the electrical circuit of the solenoid responsible for controlling the timing/coast clutch.

3. What are the possible causes of OBDII code P1788?

Possible causes of OBDII code P1788 include a faulty solenoid, damaged wiring or connectors in the solenoid circuit, low transmission fluid level, or a malfunctioning transmission control module.

4. How can I diagnose OBDII code P1788?

Diagnosing OBDII code P1788 involves using a scan tool to read the code, checking the transmission fluid level, inspecting the wiring and connectors related to the solenoid, and testing the solenoid itself for proper function.

5. How serious is OBDII code P1788?

OBDII code P1788 should be addressed promptly as it can lead to transmission issues such as poor shifting performance, which can further damage the transmission if left unattended.

6. Can I continue driving with OBDII code P1788?

It is not recommended to continue driving with OBDII code P1788 as it can cause further damage to the transmission and potentially leave you stranded on the road.

7. How can OBDII code P1788 be repaired?

Repairing OBDII code P1788 may involve replacing the faulty solenoid, repairing damaged wiring or connectors, topping up transmission fluid, or reprogramming the transmission control module.

8. Are there any DIY repair tips for OBDII code P1788?

While diagnosing and repairing OBDII code P1788 can be complex, DIY enthusiasts with automotive repair experience may attempt to inspect the wiring and connectors themselves before seeking professional help.

9. How much does it cost to fix OBDII code P1788?

The cost of fixing OBDII code P1788 can vary depending on the exact cause of the issue, the extent of the repairs needed, and whether you choose to fix it yourself or take it to a professional mechanic.

10. Can OBDII code P1788 be prevented?

Regular maintenance of the transmission system, including checking the fluid level and addressing any warning signs promptly, can help prevent issues like OBDII code P1788 from occurring.