AutoCodes – Cadillac – P1825 Cadillac

P1825 Cadillac Code - Internal Mode Switch Invalid Range

Quick Answer

The manual shift detent lever with shaft position switch assembly, or Internal Mode Switch (IMS) assembly is a sliding contact switch attached to the control valve body within the transmission. Common causes include Faulty Internal Mode Switch, Internal Mode Switch harness is open or shorted, Internal Mode Switch 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: P1825 Cadillac indicates Internal Mode Switch Invalid Range.
Common causes: Common causes include Faulty Internal Mode Switch, Internal Mode Switch harness is open or shorted, Internal Mode Switch 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 24,589

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 Sep 21, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1825 Cadillac Description

The manual shift detent lever with shaft position switch assembly, or Internal Mode Switch (IMS) assembly is a sliding contact switch attached to the control valve body within the transmission. The 4 inputs to the Transmission Control Module (TCM) from the switch indicate which position is selected by the transmission manual shaft. The input voltage at the TCM is high when the switch is open and low when the switch is closed to ground. The state of each input is displayed on the scan tool as IMS. The IMS input parameters represented are transmission range signal A, Signal B, signal C, and signal

OBDII Code P1825 Cadillac - Internal Mode Switch Invalid Range - AutoCodes.com — P1825 Cadillac Code - Internal Mode Switch Invalid Range

What does this mean?

What are the Possible Causes of the DTC P1825 Cadillac?

Faulty Internal Mode Switch
Internal Mode Switch harness is open or shorted
Internal Mode Switch circuit poor electrical connection

How to Fix the DTC P1825 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 P1825 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 P1825 Cadillac Code

1. What are the common symptoms of OBDII code P1825 in a Cadillac?

- Common symptoms include issues with shifting gears, hesitation during acceleration, and difficulty engaging or disengaging gears.

2. What causes the Internal Mode Switch Invalid Range code (P1825) in a Cadillac?

- The code P1825 typically indicates a problem with the internal mode switch (IMS) on the transmission range selector.

3. How can I diagnose the Internal Mode Switch Invalid Range code (P1825) in my Cadillac?

- Diagnosing the P1825 code involves checking the internal mode switch for proper operation, inspecting the wiring harness for damage, and ensuring all connections are secure.

4. Can a faulty internal mode switch be repaired, or does it need to be replaced?

- In most cases, a faulty internal mode switch needs to be replaced rather than repaired to resolve the P1825 code in a Cadillac.

5. Are there any DIY repair tips for fixing the Internal Mode Switch Invalid Range code (P1825) in a Cadillac?

- DIY repair tips include carefully inspecting the internal mode switch for physical damage, checking for loose connections, and ensuring proper alignment during replacement.

6. Is it safe to continue driving my Cadillac with the P1825 trouble code present?

- It is not recommended to continue driving a Cadillac with the P1825 code present, as it can lead to further transmission issues and potential safety hazards.

7. How much does it typically cost to repair the Internal Mode Switch Invalid Range code (P1825) in a Cadillac?

- The cost of repairing the P1825 code can vary depending on the labor rates and parts prices, but it is advisable to consult a mechanic for an accurate estimate.

8. Can resetting the OBDII system clear the P1825 trouble code in a Cadillac?

- Resetting the OBDII system may temporarily clear the P1825 code, but if the underlying issue with the internal mode switch is not addressed, the code is likely to return.

9. Will the P1825 code cause my Cadillac to go into "limp mode"?

- In some cases, the P1825 code can trigger the transmission to go into "limp mode," limiting functionality to protect the vehicle from further damage.

10. How can I prevent the Internal Mode Switch Invalid Range code (P1825) from recurring in my Cadillac?

- To prevent the P1825 code from recurring, it is essential to address any underlying issues promptly, perform regular maintenance on the transmission system, and follow manufacturer guidelines for servicing.