P1786 Acura Code - Automatic Transmission Poor Gear Shift
Quick Answer
P1786 Acura indicates Automatic Transmission Poor Gear Shift. Common causes include Faulty Engine Control Module (ECM), Faulty Transmission Control Module (TCM), ECM/TCM harness is open or shorted. 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
- P1786 Acura indicates Automatic Transmission Poor Gear Shift.
- Common causes
- Common causes include Faulty Engine Control Module (ECM), Faulty Transmission Control Module (TCM), ECM/TCM harness is open or shorted.
- 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 P1786 Acura Description
What are the Possible Causes of the DTC P1786 Acura?
- Faulty Engine Control Module (ECM)
- Faulty Transmission Control Module (TCM)
- ECM/TCM harness is open or shorted
- ECM/TCM circuit poor electrical connection
How to Fix the DTC P1786 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 P1786 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 P1786 Acura Code
1. What does the OBDII code P1786 mean on an Acura?
P1786 indicates "Automatic Transmission Poor Gear Shift," meaning the transmission is not shifting gears smoothly or correctly.
2. What are the common symptoms of code P1786 on an Acura?
Symptoms include rough or delayed gear shifts, slipping gears, loss of acceleration, and the transmission staying stuck in one gear.
3. What causes the P1786 code on an Acura?
Common causes include transmission fluid issues, a malfunctioning shift solenoid, a faulty transmission control module (TCM), or wiring problems.
4. Can low transmission fluid cause the P1786 code on an Acura?
Yes, insufficient or contaminated transmission fluid can lead to poor gear shifts and trigger the P1786 code.
5. How do you diagnose the P1786 code on an Acura?
Diagnosis typically involves scanning for additional codes, inspecting the transmission fluid, testing the shift solenoids, and checking wiring and connections.
6. Is it safe to drive with the P1786 code on an Acura?
Driving with this code is not recommended as poor gear shifting can cause further damage to the transmission and compromise vehicle safety.
7. How can the P1786 code be fixed on an Acura?
Repairs may include replacing the shift solenoid, flushing or refilling transmission fluid, repairing wiring, or reprogramming the transmission control module.
8. Do I need to replace the transmission to fix the P1786 code?
Not always. Many cases can be resolved by addressing specific components like solenoids or fluid issues rather than replacing the entire transmission.
9. How much does it cost to fix the P1786 code on an Acura?
Costs vary depending on the repair needed, ranging from $100 for fluid service to over $1,000 for solenoid or TCM replacement.
10. Can a faulty transmission control module cause the P1786 code on an Acura?
Yes, a malfunctioning transmission control module can disrupt gear shifting and trigger the P1786 code.
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