ezOBD2 - Free OBD2 Code Lookup and Check Engine Light Diagnostic Tool

Find Your OBD2 Code Fast

Type the code from your scanner to get causes, symptoms, and fixes.

Code P17C2

Quick reference

P17C2 at a glance

Plain-language meaning
This code means that the car's computer noticed something unusual when the car's gears were changing. It's like if you were riding a bike and the chain didn't move smoothly between gears.
Urgency
High – Ignoring this issue can lead to severe transmission damage and costly repairs.
Difficulty
Difficult
System
Transmission Performance
Tools mentioned
OBD-II scanner, Transmission fluid pressure tester, Basic hand tools

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

Laymans terms

This code means that the car's computer noticed something unusual when the car's gears were changing. It's like if you were riding a bike and the chain didn't move smoothly between gears.

Explanation

The code indicates a problem with the transmission's ability to smoothly transition between gears due to improper correlation of friction elements.

Technical description

The P17C2 code is triggered when the transmission control module (TCM) detects a discrepancy in the expected and actual performance of the transmission's friction elements during or after a gear shift. This could be due to wear, improper adjustment, or a mechanical fault within the transmission.

Symptoms

• Harsh or delayed shifting

• Transmission slipping

• Check engine light illuminated

Common Causes

• Worn friction elements

• Faulty transmission control module

• Hydraulic pressure issues

Glossary

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

Friction Elements: Components in the transmission that help engage and disengage gears smoothly.

Diagnosis steps

• Retrieve and analyze trouble codes with an OBD-II scanner.

• Inspect transmission fluid level and condition.

• Perform a transmission pressure test.

Repair procedures

• Replace worn friction elements.

• Repair or replace the transmission control module.

• Address hydraulic pressure issues, such as replacing faulty solenoids.

Tools required

• OBD-II scanner

• Transmission fluid pressure tester

• Basic hand tools

Estimated repair cost

$500 - $2000

Difficulty level

Difficult

Commonly affected vehicles

• Nissan Altima

• Infiniti Q50

• Nissan Rogue

Preventive measures

• Regularly check and maintain transmission fluid levels.

• Perform scheduled transmission services.

• 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 accurate diagnosis and repair.

Warranty information

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

Historical data

The P17C2 code has been associated with transmission issues in several Nissan and Infiniti models, often requiring comprehensive transmission diagnostics.

Urgency level

High – Ignoring this issue can lead to severe transmission damage and costly repairs.

Testing conditions

• Vehicle must be at operating temperature.

• Perform tests during normal driving conditions.

Component location

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

FAQs

Q: Can I drive with a P17C2 code?
A: It's not recommended to drive with this code as it can lead to further transmission damage.

Q: How do I clear a P17C2 code?
A: Clearing the code requires fixing the underlying issue and then using an OBD-II scanner to reset the code.

Optional diagnostic gear

Tools that may help diagnose P17C2

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.

View on Amazon
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
🌙