AutoCodes – Cadillac – P135D Cadillac

P135D Cadillac Code - Cooling Fan 2 Status Signals Message Counter Incorrect

Quick Answer

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Cooling Fan 2, Cooling Fan 2 harness is open or shorted, Cooling Fan 2 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: P135D Cadillac indicates Cooling Fan 2 Status Signals Message Counter Incorrect.
Common causes: Common causes include Faulty Cooling Fan 2, Cooling Fan 2 harness is open or shorted, Cooling Fan 2 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 627

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 27, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P135D Cadillac Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the Cooling Fan 2 Status Signals Message Counter is Incorrect.

OBDII Code P135D Cadillac - Cooling Fan 2 Status Signals Message Counter Incorrect - AutoCodes.com — P135D Cadillac Code - Cooling Fan 2 Status Signals Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P135D Cadillac?

Faulty Cooling Fan 2
Cooling Fan 2 harness is open or shorted
Cooling Fan 2 circuit poor electrical connection

How to Fix the DTC P135D 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 P135D 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 P135D Cadillac Code

1. What are the common symptoms of OBDII code P135D in a Cadillac related to the Cooling Fan 2 Status Signals Message Counter Incorrect?

- Common symptoms include the cooling fan not working properly, engine overheating, and the check engine light coming on.

2. What are the possible causes of OBDII code P135D in a Cadillac?

- Possible causes may include a faulty cooling fan, a malfunctioning fan relay, wiring issues, or a problem with the engine control module (ECM).

3. How can I diagnose the issue related to OBDII code P135D in a Cadillac?

- To diagnose the issue, you can start by checking the cooling fan operation, inspecting the fan relay, testing the wiring connections, and scanning the ECM for error codes.

4. Is it safe to continue driving with OBDII code P135D in a Cadillac?

- It is not recommended to drive with this code as it can lead to engine overheating and potential damage. It's best to address the issue promptly.

5. Can I repair OBDII code P135D in a Cadillac on my own?

- Depending on your skills and knowledge, you may be able to repair this issue on your own by replacing the cooling fan, fixing wiring problems, or resetting the ECM.

6. How much does it typically cost to fix OBDII code P135D in a Cadillac?

- The cost of repairs can vary depending on the specific issue, but it may range from $100 to $500, including parts and labor.

7. What are some preventive maintenance tips to avoid OBDII code P135D in a Cadillac?

- Regularly inspecting the cooling system, checking the fan operation, and addressing any warning signs promptly can help prevent this code from occurring.

8. Can extreme weather conditions affect the likelihood of encountering OBDII code P135D in a Cadillac?

- Yes, extreme heat or cold can put additional stress on the cooling system components, potentially leading to issues like the one indicated by this code.

9. How long does it typically take to repair OBDII code P135D in a Cadillac?

- The repair time can vary based on the exact cause of the issue, but it may take anywhere from 1 to 3 hours to diagnose and fix the problem.

10. Are there any recalls or technical service bulletins related to OBDII code P135D in Cadillac vehicles?

- It is advisable to check with a Cadillac dealership or online resources for any relevant recalls or technical service bulletins related to this specific OBDII code to stay informed about potential manufacturer-acknowledged issues.