P1787 Acura Code - Automatic Transmission Lock-Up Clutch Malfunction
Quick Answer
P1787 Acura indicates Automatic Transmission Lock-Up Clutch Malfunction. Common causes include Faulty Transmission Control Module (TCM), TCM harness is open or shorted, TCM 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
- P1787 Acura indicates Automatic Transmission Lock-Up Clutch Malfunction.
- Common causes
- Common causes include Faulty Transmission Control Module (TCM), TCM harness is open or shorted, TCM 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.
Code P1787 Acura Description
What are the Possible Causes of the DTC P1787 Acura?
- Faulty Transmission Control Module (TCM)
- TCM harness is open or shorted
- TCM circuit poor electrical connection
How to Fix the DTC P1787 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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1787 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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Frequently Asked Questions about P1787 Acura Code
1. What does the OBDII code P1787 mean on an Acura?
P1787 indicates an Automatic Transmission Lock-Up Clutch Malfunction, meaning the transmission’s lock-up clutch is not engaging or disengaging properly.
2. What are the common symptoms of code P1787 in an Acura?
Symptoms may include poor fuel efficiency, transmission slipping, harsh shifting, engine stalling at low speeds, and illumination of the check engine light.
3. What causes the P1787 code in an Acura?
Common causes include a faulty lock-up solenoid, transmission fluid issues (low, dirty, or incorrect type), wiring or electrical problems, or internal transmission damage.
4. Can driving with a P1787 code damage my Acura's transmission?
Yes, continuing to drive with this issue can cause further transmission damage or overheating, so it's best to address it promptly.
5. How do I diagnose the P1787 code on my Acura?
Diagnosis involves checking the transmission fluid condition, inspecting the lock-up solenoid, testing wiring and connectors, and performing a scan tool test to monitor lock-up clutch operation.
6. How do I fix the P1787 code on an Acura?
Repairs may include replacing the lock-up solenoid, flushing or replacing the transmission fluid, repairing wiring or connectors, or addressing internal transmission issues.
7. Can low or dirty transmission fluid cause the P1787 code?
Yes, low or contaminated transmission fluid can prevent the lock-up clutch from working properly and trigger the P1787 code.
8. Is the P1787 code specific to Acura vehicles?
While P1787 is more common in Acura and Honda vehicles, other manufacturers may use similar codes for lock-up clutch malfunctions.
9. How much does it cost to fix the P1787 code in an Acura?
Repair costs vary depending on the severity of the issue, ranging from $100 for fluid changes to over $1,000 for solenoid or transmission repairs.
10. Can I reset the P1787 code without fixing the issue?
You can clear the code with a scan tool, but it will likely return if the underlying problem isn’t resolved.
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