C1105 — Traction Control Disable Lamp – Circuit Short to Battery #

Please note: The code label and description may slightly differ depending on the vehicle manufacturer (OEM).

Known label variations (by OEM):

• Traction Control Disabled Indicator Circuit Short to Battery — Chrysler
• Traction Control Lamp Circuit High — Nissan
• ESP/TCS Indicator Circuit High Input — Hyundai/Kia

Summary of Code C1105 #

C1105 is a diagnostic trouble code (DTC) indicating that the circuit controlling the traction control disable indicator lamp is experiencing a short to battery voltage. In simpler terms, the vehicle’s computer has detected abnormal voltage—specifically, a higher-than-expected signal—on the wiring that lights up the dashboard warning lamp for traction control deactivation. This alert is crucial because it signals issues either within the electrical circuit, the indicator lamp, or the control module itself. While the code does not necessarily mean the traction control system is non-functional, it does suggest a communication or wiring problem that could impact safety features. Ignoring this code may mask other, more serious issues with stability or traction control systems.

Common Symptoms for Code C1105 #

When code C1105 is present, you may notice a combination of dashboard warnings and subtle changes in vehicle behavior. The most frequent symptom is the traction control disable indicator lamp staying on or flickering unexpectedly. This lamp, sometimes labeled “TCS OFF” or “ESP OFF,” lets you know if the traction control system is disabled or compromised. In some cases, you may also feel a difference when accelerating on slippery surfaces, as traction control may be affected. Here’s what to look for:

• Traction control disable indicator lamp illuminated or flashing constantly
• Inability to manually engage or disengage traction control via dash switch
• ABS (Anti-lock Braking System) warning light may also be illuminated
• Possible loss of traction assistance in low-grip situations
• Traction control system temporarily or permanently disabled

Probable Causes for Code C1105 #

This code is most often the result of an electrical fault in the indicator lamp circuit. The vehicle’s computer expects to see a certain voltage range; a “short to battery” means the circuit is seeing full battery voltage when it shouldn’t. Here are the most common culprits, ranked by frequency:

1. Damaged or shorted wiring harness — Frayed, pinched, or corroded wires causing a direct connection to the battery voltage.
2. Faulty traction control disable indicator lamp — The bulb, LED, or related circuit board inside the dashboard cluster may have failed or shorted internally.
3. Malfunctioning traction control module — The module (sometimes combined with ABS) could be sending out incorrect signals or internally shorted.
4. Poor ground connection — A loose or corroded ground can cause voltage to backfeed into the lamp circuit.
5. Incorrect aftermarket installation — Add-ons like remote starters or alarms may tap into dashboard circuits, leading to stray voltage.

Step-by-Step Diagnostics for Code C1105 #

A methodical approach is key to resolving C1105. Skipping steps can result in wasted time or unnecessary parts replacement. Here’s how a professional technician would tackle this DTC:

1. Retrieve all codes — Use a professional scan tool to check for related ABS, traction, or CAN communication codes.
2. Inspect the indicator lamp — Check if the traction control disable indicator lamp operates as intended during bulb check (ignition ON, engine OFF).
3. Visual inspection of wiring — Examine harnesses between the dash cluster, traction control/ABS module, and related connectors for damage, corrosion, or aftermarket splices.
4. Test circuit voltage — With a digital multimeter, measure the voltage at the indicator lamp circuit. Compare readings with OEM specs.
5. Check for shorts to battery — Disconnect the module and lamp; check for continuity between the circuit and battery voltage.
6. Verify ground integrity — Inspect and measure resistance at all ground points relevant to the lamp and module.
7. Test the traction control/ABS module — If wiring and lamp test fine, the module may need further diagnosis per OEM procedures.

Possible Repairs for Code C1105 #

Repairs for C1105 will depend on the root cause identified during diagnosis. It is critical to confirm the fault before replacing any components. Typical solutions include:

• Repairing or replacing damaged wiring or connectors in the indicator lamp circuit
• Replacing the traction control disable indicator lamp or dashboard cluster if faulty
• Securing or restoring proper ground connections
• Removing or correcting any improper aftermarket wiring
• Replacing the traction control or ABS module if proven faulty (rare, after all other avenues exhausted)

Is It Safe to Drive with Code C1105? #

Yes, but with limitations. Code C1105 itself typically does not affect the core function of the traction control system, but it does impair your vehicle’s ability to alert you to traction control status changes. If other related warning lights are present (such as ABS or stability control), or if you notice changes in how the vehicle handles on slippery roads, it is best to have the issue addressed promptly. Continued driving without addressing the code can mask more serious faults, so schedule a repair as soon as practical—especially before encountering poor driving conditions.

Vehicles Most Commonly Affected by Code C1105 #

While C1105 can appear on a variety of makes and models, it is most frequently reported on vehicles from manufacturers that use similar traction or stability control architectures. These include:

• Chrysler, Dodge, and Jeep vehicles (various models)
• Nissan and Infiniti models (especially mid-2000s to early 2010s)
• Hyundai and Kia vehicles
• Some GM and Ford models with advanced traction/stability integration

Common Mistakes & Best Practices for Code C1105 #

Misdiagnosis can occur if steps are skipped or if the technician overlooks related faults. Here are some common errors and professional tips to avoid them:

• Replacing the dashboard indicator lamp without checking the wiring or module first
• Ignoring other traction or ABS-related codes that could be related to the root cause
• Overlooking aftermarket accessories that may have been incorrectly wired into the dashboard circuits
• Not performing a thorough visual inspection of harnesses under the dash and hood
• Clearing codes before confirming a successful repair, leading to return visits

Quick FAQ for Code C1105 #

Still have questions about C1105? Here are some quick answers to common concerns:

• Q: Will this code cause my car to fail emissions testing?
  A: No, C1105 is related to traction control, not emissions. However, some state inspections may flag active warning lights as a reason to deny certification.
• Q: Can I clear the code myself with an OBD-II scanner?
  A: You can clear the code, but it will return if the underlying wiring or component issue is not fixed. Always diagnose before erasing codes.
• Q: Does this mean my traction control is completely disabled?
  A: Not always. Sometimes the system still works, but you will not receive dashboard alerts if it is turned off or malfunctions. Always test system function after repairs.