AutoCodes – Cadillac – P07C0 Cadillac

P07C0 Cadillac 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 Cadillac 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 320

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

What does this mean?

What are the Possible Causes of the DTC P07C0 Cadillac?

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 Cadillac?

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 Cadillac 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.

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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 Cadillac Code

1. What does the OBDII code P07C0 mean on a Cadillac?

P07C0 indicates a "Transmission Input Speed Sensor Circuit High Voltage," meaning the input speed sensor in the transmission is reporting a voltage higher than expected.

2. What are the symptoms of the P07C0 code on a Cadillac?

Common symptoms include erratic shifting, transmission slipping, poor acceleration, illuminated check engine light, or the vehicle entering limp mode.

3. What causes the P07C0 code to appear on a Cadillac?

Possible causes include a faulty input speed sensor, damaged wiring or connectors, a short circuit, or a malfunctioning powertrain control module (PCM).

4. Can I drive my Cadillac with the P07C0 code active?

While the car may still be drivable, itâ€™s not recommended to drive for long periods. The transmission may not operate correctly, potentially causing further damage.

5. How do I diagnose the P07C0 code on a Cadillac?

Start by using a scan tool to confirm the code. Then inspect the input speed sensor, its wiring, and connectors for damage or corrosion. Finally, test the sensorâ€™s voltage and resistance.

6. How do I fix the P07C0 code on a Cadillac?

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

7. How much does it cost to fix the P07C0 code on a Cadillac?

The repair cost varies depending on the issue. Replacing the speed sensor typically costs $150â€“$300, while wiring repairs may cost $50â€“$200. PCM replacement can exceed $1,000.

8. Can a dead battery cause the P07C0 code in a Cadillac?

A weak or dead battery is unlikely to directly cause this code but can contribute to electrical issues that may affect sensor operation.

9. Does the P07C0 code affect fuel efficiency in a Cadillac?

Yes, the P07C0 code can lead to inefficient transmission performance, which may reduce fuel economy.

10. Is the P07C0 code specific to Cadillacs, or can it appear in other vehicles?

The P07C0 code is not unique to Cadillacs and can appear in other makes and models equipped with OBDII systems, though its symptoms and causes may vary slightly.