AutoCodes – Generic – P1CA3

P1CA3 Code - Gear Shift Position Sensor 4 Circuit High

Quick Answer

This diagnostic compares the output signal of the sensor to threshold values of normal operations. Common causes include Faulty Gear Shift Position Sensor 4, Gear Shift Position Sensor 4 harness is open or shorted, Gear Shift Position Sensor 4 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: P1CA3 indicates Gear Shift Position Sensor 4 Circuit High.
Common causes: Common causes include Faulty Gear Shift Position Sensor 4, Gear Shift Position Sensor 4 harness is open or shorted, Gear Shift Position Sensor 4 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,909

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1CA3 Description

This diagnostic compares the output signal of the sensor to threshold values of normal operations. When the signal is out of range the diagnostic will be considered failing. The sensor is mounted next to the 6th gear engagement actuator to detect a linear movement of the piston. For this purpose a permanent magnet is mounted on the piston which is moved over a complete travel stroke. The magnet position generates a saturation area in the internal ferromagnetic core of the sensor which is transformed to an output position signal. The sensor provides an output signal with Pulse Width Modulation (PWM) at a fixed frequency and duty cycle proportional to the piston position of the actuator.

OBDII Code P1CA3 - Gear Shift Position Sensor 4 Circuit High - AutoCodes.com — P1CA3 Code - Gear Shift Position Sensor 4 Circuit High

What does this mean?

What are the Possible Causes of the DTC P1CA3?

Faulty Gear Shift Position Sensor 4
Gear Shift Position Sensor 4 harness is open or shorted
Gear Shift Position Sensor 4 circuit poor electrical connection
Faulty Transmission Control Module (TCM)

How to Fix the DTC P1CA3?

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 P1CA3 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.

Need more information about the P1CA3 code?

Need more information on how to fix the P1CA3 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1CA3 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1CA3 Chrysler — Gear Shift Position Sensor 4 Circuit High
P1CA3 Dodge — Gear Shift Position Sensor 4 Circuit High
P1CA3 Fiat — Gear Shift Position Sensor 4 Circuit High
P1CA3 Jeep — Gear Shift Position Sensor 4 Circuit High

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1CA3 Code

What does OBDII code P1CA3 mean?

Code P1CA3 refers to a fault in the Gear Shift Position Sensor 4 Circuit, indicating that the sensor is detecting an abnormally high voltage.

What are the common symptoms of code P1CA3?

Symptoms may include inconsistent gear shifting, the transmission stuck in one gear, a check engine light, or difficulty starting the vehicle.

What causes code P1CA3 to appear?

This code is typically caused by a faulty gear shift position sensor, damaged wiring or connectors, or issues with the transmission control module (TCM).

Can I drive my vehicle with code P1CA3?

Driving with this code is not recommended as it may lead to erratic shifting or transmission damage over time.

How is code P1CA3 diagnosed?

A technician will use a scan tool to confirm the code, inspect the gear shift position sensor and its wiring, and test for high voltage signals in the circuit.

How do you fix OBDII code P1CA3?

Repairs often involve replacing the gear shift position sensor, repairing or replacing damaged wiring, and checking the transmission control module for faults.

How much does it cost to fix code P1CA3?

Repair costs vary but may range from $100 to $400 depending on whether the sensor, wiring, or other components need replacement.

Can a faulty gear shift position sensor cause transmission failure?

Yes, if the sensor continuously provides incorrect position data, it may lead to improper gear engagement and potential transmission damage.

Does code P1CA3 require reprogramming the transmission control module?

In some cases, after sensor replacement or extensive repairs, reprogramming the TCM may be necessary to ensure proper operation.

How can I prevent code P1CA3 from recurring?

Regular maintenance, inspecting wiring for damage, and addressing transmission issues promptly can help prevent this code from reappearing.

Discuss the causes and fixes for P1CA3 OBDII Code

Submit a New Comment

Code P1CA3 comments

No comments found for this page.

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.