AutoCodes – Generic – C1735

C1735 Code - Ignition Signal

Quick Answer

The Body Control Module (BCM) monitors the IGN ON signal on the CAN line and compares it to the direct IGN ON signal. Common causes include CAN communication, Faulty Body Control Module (BCM), Faulty Ignition Switch. 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: C1735 indicates Ignition Signal.
Common causes: Common causes include CAN communication, Faulty Body Control Module (BCM), Faulty Ignition Switch.
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 15,440

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 Nov 19, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1735 Description

The Body Control Module (BCM) monitors the IGN ON signal on the CAN line and compares it to the direct IGN ON signal. When these two signals do not match, the BCM sets C1735.

OBDII Code C1735 - Ignition Signal - AutoCodes.com — C1735 Code - Ignition Signal

What does this mean?

What are the Possible Causes of the DTC C1735?

CAN communication
Faulty Body Control Module (BCM)
Faulty Ignition Switch
BCM/Ignition Switch harness is open or shorted
BCM/Ignition Switch circuit poor electrical connection

How to Fix the DTC C1735?

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 C1735 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 C1735 code?

Need more information on how to fix the C1735 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1735 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1735 Infiniti — Ignition Signal
C1735 Lexus — Height Control Exhaust Valve Circuit
C1735 Nissan — Ignition Signal
C1735 Toyota — Height Control Exhaust Valve Circuit

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 C1735 Code

1. What are the common symptoms of OBDII code C1735 (Ignition Signal)?

The common symptoms of OBDII code C1735 include engine misfires, rough idling, poor acceleration, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code C1735?

Possible causes of OBDII code C1735 include a faulty ignition coil, damaged ignition wiring, a malfunctioning ignition control module, or a problem with the ignition switch.

3. How can I diagnose the issue related to OBDII code C1735?

Diagnosing the issue related to OBDII code C1735 involves using a diagnostic scanner to retrieve the code, checking the ignition system components for any visible damage, and testing the ignition coil and control module for proper functionality.

4. Can a DIY enthusiast repair OBDII code C1735 at home?

Depending on the exact cause of the code, a DIY enthusiast may be able to repair OBDII code C1735 at home by replacing the faulty ignition component or fixing any damaged wiring. However, complex issues may require professional assistance.

5. How important is it to address OBDII code C1735 promptly?

It is important to address OBDII code C1735 promptly as ignoring the issue can lead to further damage to the ignition system, reduced fuel efficiency, and potential safety hazards while driving.

6. Are there any preventive measures to avoid OBDII code C1735?

Routine maintenance of the ignition system, such as regular spark plug replacements and inspection of ignition components, can help prevent OBDII code C1735 from occurring.

7. Can OBDII code C1735 cause damage to other vehicle components?

If left unaddressed, OBDII code C1735 can potentially cause damage to other vehicle components, such as the catalytic converter, due to incomplete combustion and increased emissions.

8. What is the typical cost to repair OBDII code C1735?

The cost to repair OBDII code C1735 can vary depending on the underlying cause and whether the repair is done at a dealership or an independent repair shop. Costs may range from $100 to $500 or more.

9. How long does it take to repair OBDII code C1735?

The time to repair OBDII code C1735 can vary based on the complexity of the issue, availability of parts, and the technician's experience. In general, it may take anywhere from one to several hours to complete the repair.

10. Can driving with OBDII code C1735 cause further damage to the vehicle?

Continuing to drive with OBDII code C1735 can potentially cause further damage to the vehicle's ignition system, leading to more severe issues over time. It is recommended to address the problem as soon as possible.