AutoCodes – Generic – P07C0

P07C0 Code - Transmission Input Speed Sensor Circuit High Voltage

Quick Answer

The Input Speed Sensor detects the primary pulley revolution speed and sends a signal to the Transmission. Common causes include Faulty Transmission Input Speed Sensor, Transmission Input Speed Sensor harness is open or shorted, Transmission Input Speed Sensor 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: P07C0 indicates Transmission Input Speed Sensor Circuit High Voltage.
Common causes: Common causes include Faulty Transmission Input Speed Sensor, Transmission Input Speed Sensor harness is open or shorted, Transmission Input Speed Sensor 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.

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Code Popularity 2,455

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 Jul 29, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P07C0 Description

The Input Speed Sensor detects the primary pulley revolution speed and sends a signal to the Transmission. The Input Speed Sensor (ISS), also known as the transmission turbine speed sensor, is a hall-effect type sensor. The ISS mounts to the control valve upper body assembly and connects to the control solenoid (w/body and Transmission Control Module (TCM)) valve assembly through a wire harness and connector. The sensor faces the 1-2-3-4 and 3-5-R clutch housing machined teeth surface. The sensor receives 8.3-9.3 volts on the Input/Output Speed Sensor (ISS/OSS) supply voltage circuit from the Transmission Control Module (TCM). As the 1-2-3-4 and 3-5-R clutch housing rotates, the sensor produces a signal frequency based on the machined surface of the 1-2-3-4 and 3-5-R clutch housing. This signal is transmitted through the ISS signal circuit to the control solenoid (w/body and TCM) valve assembly. The control solenoid (w/body and TCM) valve assembly uses the ISS signal to determine line pressure, transmission shift patterns, Torque Converter Clutch (TCC) slip speed, and gear ratio. The Diagnostic Trouble Code (DTC) will be set when the TCM detects the ISS signal circuit voltage is greater than 4.75 V for 0.8 s.

OBDII Code P07C0 - Transmission Input Speed Sensor Circuit High Voltage - AutoCodes.com — P07C0 Code - Transmission Input Speed Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P07C0?

Faulty Transmission Input Speed Sensor
Transmission Input Speed Sensor harness is open or shorted
Transmission Input Speed Sensor circuit poor electrical connection
Faulty Control Solenoid Valve Assembly

How to Fix the DTC P07C0?

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 P07C0 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 P07C0 code?

Need more information on how to fix the P07C0 code? Get Access to Factory Service Manuals

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Information for Specific Makes

P07C0 Buick — Transmission Input Speed Sensor Circuit High Voltage
P07C0 Cadillac — Transmission Input Speed Sensor Circuit High Voltage
P07C0 Chevrolet — Transmission Input Speed Sensor Circuit High Voltage
P07C0 GMC — Transmission Input Speed Sensor Circuit High Voltage
P07C0 Lexus — Input / Turbine Speed Sensor 'A' Circuit High
P07C0 Scion — Input / Turbine Speed Sensor 'A' Circuit High
P07C0 Toyota — Input / Turbine Speed Sensor 'A' 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 P07C0 Code

1. What does the OBDII code P07C0 mean?

The P07C0 code indicates that the transmission input speed sensor circuit is detecting a voltage level that is higher than the manufacturer-specified range.

2. What are the common symptoms of the P07C0 code?

Symptoms may include the Check Engine Light turning on, erratic shifting, failure to shift gears, or a loss of power when accelerating.

3. What causes the P07C0 code to appear?

Common causes include a faulty transmission input speed sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning powertrain control module (PCM).

4. Can I drive my car with the P07C0 code?

Driving with this code is not recommended, as it can lead to transmission damage or unsafe driving conditions due to erratic shifting or power loss.

5. How do I diagnose the P07C0 code?

Diagnose the issue by using an OBDII scanner to confirm the code, inspecting the transmission input speed sensor and its wiring for damage, and testing the sensor's voltage levels with a multimeter.

6. How do I fix the P07C0 code?

Repairs may include replacing the faulty transmission input speed sensor, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.

7. What tools are needed to fix the P07C0 code?

Youâ€™ll typically need an OBDII scanner, a multimeter, and basic hand tools to inspect and test the sensor and wiring.

8. How much does it cost to repair a P07C0 code?

Repair costs can vary but typically range from $100 to $300 for parts and labor, depending on whether the issue is with the sensor or wiring.

9. Can a dirty or contaminated transmission cause the P07C0 code?

While less common, dirty or contaminated transmission fluid can potentially interfere with sensor readings and contribute to this code.

10. How can I prevent the P07C0 code from recurring?

Regularly inspect and maintain the transmission system, including checking the condition of the input speed sensor, wiring, and connectors, and ensuring the transmission fluid is clean and at the proper level.