P135C Cadillac Code - Cooling Fan 1 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 1, Cooling Fan 1 harness is open or shorted, Cooling Fan 1 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
- P135C Cadillac indicates Cooling Fan 1 Status Signals Message Counter Incorrect.
- Common causes
- Common causes include Faulty Cooling Fan 1, Cooling Fan 1 harness is open or shorted, Cooling Fan 1 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.
Code P135C Cadillac Description
What are the Possible Causes of the DTC P135C Cadillac?
- Faulty Cooling Fan 1
- Cooling Fan 1 harness is open or shorted
- Cooling Fan 1 circuit poor electrical connection
How to Fix the DTC P135C 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 P135C 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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Frequently Asked Questions about P135C Cadillac Code
1. What does the OBDII code P135C mean on a Cadillac?
P135C indicates an issue with the Cooling Fan 1 Status Signals Message Counter, suggesting a communication error between the cooling fan module and the engine control module (ECM).
2. What are the common symptoms of code P135C on a Cadillac?
Symptoms may include the cooling fan not operating properly, engine overheating, reduced A/C performance, or the check engine light illuminating.
3. What causes the P135C code to appear on a Cadillac?
Common causes include a faulty cooling fan control module, wiring or connector issues in the fan circuit, or a malfunctioning engine control module (ECM).
4. How do I fix the P135C code on my Cadillac?
Repairs may involve inspecting and repairing wiring or connectors, replacing the cooling fan control module, or updating/reprogramming the ECM if necessary.
5. Can I drive my Cadillac with the P135C code active?
Driving with this code is not recommended, as it could lead to engine overheating and potential damage if the cooling fan fails to operate.
6. How can I diagnose the P135C code on a Cadillac?
Diagnosis involves scanning the vehicle with an OBDII scanner, inspecting the cooling fan circuit for damage, and testing the cooling fan control module for proper operation.
7. Is code P135C specific to Cadillacs?
While the code may appear on other vehicles, the specific description and troubleshooting steps for P135C are tailored to Cadillac models.
8. How much does it cost to repair the P135C code on a Cadillac?
Repair costs vary, but replacing a cooling fan control module typically ranges from $200 to $400, excluding labor costs for diagnostic and repair time.
9. Can a blown fuse cause the P135C code on a Cadillac?
Yes, a blown fuse in the cooling fan circuit can interrupt communication and trigger the P135C code.
10. Will resetting the check engine light clear the P135C code on my Cadillac?
Resetting the check engine light may temporarily clear the code, but it will return if the underlying issue is not addressed and repaired.
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