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Code P1736

Quick reference

P1736 at a glance

Plain-language meaning
This code means that the car's computer has detected a problem with the sixth gear. It's like when you're riding a bike and the chain slips, making it hard to pedal smoothly.
Urgency
High – Driving with this issue can lead to further transmission damage.
Difficulty
Difficult
System
Transmission Performance
Tools mentioned
OBD-II scanner, Transmission fluid dipstick, Multimeter

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

Laymans terms

This code means that the car's computer has detected a problem with the sixth gear. It's like when you're riding a bike and the chain slips, making it hard to pedal smoothly.

Explanation

The transmission control module (TCM) has detected an incorrect gear ratio for the sixth gear, indicating a possible issue with the transmission's ability to engage or hold the correct gear.

Technical description

The P1736 code is triggered when the TCM identifies a discrepancy between the expected gear ratio and the actual gear ratio in the sixth gear. This can be due to mechanical issues in the transmission or problems with the sensors that monitor gear ratios.

Symptoms

• Check Engine Light is on

• Transmission slipping or not shifting properly

• Decreased fuel efficiency

Common Causes

• Faulty transmission solenoid

• Worn or damaged transmission gears

• Malfunctioning speed sensors

Glossary

Transmission Control Module (TCM): A computer that controls the transmission's functions.

Solenoid: An electromechanical device that controls fluid flow in the transmission.

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the transmission fluid level and condition.

• Check the operation of the transmission solenoids and sensors.

Repair procedures

• Replace faulty transmission solenoid.

• Repair or replace damaged gears in the transmission.

• Replace malfunctioning speed sensors.

Tools required

• OBD-II scanner

• Transmission fluid dipstick

• Multimeter

Estimated repair cost

$500 - $1500

Difficulty level

Difficult

Commonly affected vehicles

• Nissan Altima

• Honda Accord

• Toyota Camry

Preventive measures

• Regular transmission fluid changes

• Routine transmission inspections

• Avoid aggressive driving habits

Error code type

Transmission Performance

User experience recommendations

• Avoid driving the vehicle until repaired to prevent further damage.

• Consult a professional mechanic for a thorough diagnosis.

Warranty information

Transmission repairs may be covered under powertrain warranty if still valid.

Historical data

This code has been more prevalent in vehicles with higher mileage or those that have not had regular transmission maintenance.

Urgency level

High – Driving with this issue can lead to further transmission damage.

Testing conditions

• Vehicle must be driven to engage the sixth gear.

• Transmission should be at operating temperature.

Component location

The transmission is located between the engine and the driveshaft, typically underneath the vehicle.

FAQs

Q: Can I drive with a P1736 code?
A: It's not recommended as it may cause further damage to the transmission.

Q: What happens if I ignore the P1736 code?
A: Ignoring the code can lead to severe transmission damage and costly repairs.

Optional diagnostic gear

Tools that may help diagnose P1736

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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