C1116 – OBD-II DTC

OBD-II DTC C1116 – Starter Motor Circuit Failure

DTC C1116 meaning

DTC C1116 refers to a diagnostic trouble code indicating a failure in the starter motor circuit. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components to ensure proper operation. When the vehicle’s computer detects an issue with the starter motor circuit, it triggers this code, signaling that the starter may not be functioning correctly or that there is an electrical issue affecting its operation.

DTC C1116 symptoms

Common symptoms associated with DTC C1116 may include:

• The engine fails to start or cranks slowly.
• Intermittent starting issues, where the vehicle may start sometimes but not others.
• Unusual noises from the starter motor, such as grinding or clicking sounds.
• Dashboard warning lights, particularly the check engine light, may illuminate.

DTC C1116 causes

Several factors can lead to the triggering of DTC C1116, including:

• A faulty starter motor that is unable to engage or turn the engine.
• Weak or dead battery, which may not provide sufficient power to the starter.
• Corroded or loose electrical connections in the starter circuit.
• Defective ignition switch that fails to send the start signal to the starter.
• Issues with the vehicle’s wiring harness, such as shorts or breaks.

DTC C1116 seriousness

DTC C1116 is considered a serious issue as it directly affects the vehicle’s ability to start. If left unaddressed, it can lead to further electrical problems or complete failure of the starting system. It is advisable to diagnose and repair the issue promptly to avoid being stranded or facing more extensive repairs.

How to diagnose DTC C1116

To diagnose DTC C1116, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the C1116 code.
2. Inspect the battery for charge and condition replace if necessary.
3. Check all electrical connections in the starter circuit for corrosion or looseness.
4. Test the starter motor for proper operation using a multimeter.
5. Examine the ignition switch for functionality and proper signal transmission.
6. Inspect the wiring harness for any signs of damage or shorts.

How to fix DTC C1116 step-by-step instructions

To fix DTC C1116, follow these step-by-step instructions:

1. Ensure the vehicle is in a safe and secure position.
2. Disconnect the negative battery terminal to prevent electrical shock.
3. Inspect and clean all connections in the starter circuit.
4. If the battery is weak, charge or replace it as needed.
5. Test the starter motor
   

   Recommended tools for OBD-II diagnostics

   Explore our expert picks: The Best OBD2 Scanners for 2025

   Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

   ← All OBD-II Diagnostic Trouble Codes

   Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.