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Code P0780

Quick reference

P0780 at a glance

Plain-language meaning
This code means that the car's computer noticed something wrong when the car tries to change gears. It's like when you're riding a bike and the chain slips when you try to switch gears.
Urgency
Moderate – It should be addressed soon to prevent further transmission damage.
Difficulty
Moderate
System
Transmission Issue
Tools mentioned
OBD-II scanner, Multimeter, Transmission fluid pressure gauge

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means that the car's computer noticed something wrong when the car tries to change gears. It's like when you're riding a bike and the chain slips when you try to switch gears.

Explanation

The P0780 code indicates a problem in the automatic transmission's ability to shift gears properly.

Technical description

The P0780 code is triggered when the transmission control module (TCM) detects an issue with the shift solenoid or the internal transmission components that prevent the transmission from shifting correctly. This can be due to electrical or mechanical failures.

Symptoms

• Check Engine Light is on

• Transmission slipping

• Harsh or erratic shifting

Common Causes

• Faulty shift solenoid

• Transmission fluid issues

• Internal transmission failure

Glossary

Transmission: A system in a vehicle that transmits power from the engine to the wheels.

Solenoid: An electromechanical device used to control the flow of fluid in the transmission.

Diagnosis steps

• Check transmission fluid level and condition

• Inspect wiring and connectors to the transmission

• Test the shift solenoids for proper operation

Repair procedures

• Replace faulty shift solenoid

• Change or flush transmission fluid

• Repair or replace internal transmission components

Tools required

• OBD-II scanner

• Multimeter

• Transmission fluid pressure gauge

Estimated repair cost

$200 - $1500

Difficulty level

Moderate

Commonly affected vehicles

• Honda Accord

• Toyota Camry

• Ford F-150

Preventive measures

• Regularly check and change transmission fluid

• Avoid aggressive driving habits

• Perform routine transmission maintenance

Error code type

Transmission Issue

User experience recommendations

• Have the vehicle diagnosed by a professional

• Avoid driving the vehicle if the issue worsens

• Regularly maintain the transmission

Warranty information

Transmission repairs may be covered under the powertrain warranty if the vehicle is still within the warranty period.

Historical data

P0780 has been a common code for automatic transmissions, often related to solenoid or fluid issues.

Urgency level

Moderate – It should be addressed soon to prevent further transmission damage.

Testing conditions

• Vehicle at operating temperature

• Transmission in drive

Component location

The transmission is located underneath the vehicle, between the engine and the drive wheels.

FAQs

Q: Can I drive with a P0780 code?
A: It's not recommended as it can lead to further transmission damage.

Q: How can I prevent a P0780 code?
A: Regular maintenance and fluid checks can help prevent this issue.

Optional diagnostic gear

Tools that may help diagnose P0780

THINKCAR ThinkScan Bidirectional diagnostic tool illustration

High-End · Full-system diagnostics

THINKCAR ThinkScan Bidirectional

A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.

Network faults often require full-system access instead of a generic code reader alone.

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Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.

View on Amazon
WORKPRO Wiring Repair Kit diagnostic tool illustration

Universal · Wire connectors and repair kit

WORKPRO Wiring Repair Kit

Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.

Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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