OBD-II DTC C1273 – Motor # 2 Input Circuit Short to Vbat
DTC C1273 meaning
DTC C1273 refers to a diagnostic trouble code indicating a short circuit in the input circuit of Motor #2 to the vehicle’s battery voltage (Vbat). This code is typically associated with issues in the electronic control system that manages various motors, such as those found in power steering or braking systems. The presence of this code suggests that the control module has detected an abnormal voltage level, which may affect the operation of the associated motor.
DTC C1273 symptoms
Common symptoms associated with DTC C1273 may include:
- Warning lights illuminated on the dashboard, such as the ABS or traction control light.
- Loss of functionality in the affected motor, leading to issues like reduced power steering assist.
- Erratic behavior of the vehicle’s electronic systems.
- Increased difficulty in steering or braking, depending on the motor affected.
DTC C1273 causes
Several potential causes for DTC C1273 include:
- Wiring issues, such as frayed or damaged wires in the input circuit.
- Corrosion or poor connections at the motor or control module connectors.
- Faulty motor or actuator that is drawing excessive current.
- Defective control module that is misinterpreting the input signals.
DTC C1273 seriousness
The seriousness of DTC C1273 can vary based on the vehicle’s design and the specific motor affected. However, it is generally considered a moderate to high severity issue because:
- It can lead to a loss of critical vehicle functions, such as steering or braking assistance.
- Ignoring the code may result in further damage to the motor or control module.
- It can compromise vehicle safety, making it essential to address promptly.
How to diagnose DTC C1273
To diagnose DTC C1273, follow these steps:
- Use an OBD-II scanner to confirm the presence of the code and check for any additional codes.
- Inspect the wiring and connectors associated with Motor #2 for any visible damage or corrosion.
- Test the voltage and ground at the motor connector to ensure proper electrical supply.
- Check the resistance of the motor to determine if it is within specifications.
- Examine the control module for any signs of failure or internal faults.
How to fix DTC C1273 step-by-step instructions
To fix DTC C1273, follow these step-by-step instructions:
- Start by disconnecting the vehicle’s battery to ensure safety while working on electrical components.
- Inspect and repair any damaged wiring or connectors related to Motor #2.
- Clean any corroded connections using an appropriate electrical contact cleaner.
- Test the motor for proper operation and replace it if it is found to be faulty.
- Reconnect the battery and clear the DTC using an OBD-II scanner.
- Perform a test drive to ensure the issue is resolved and the code does not reappear.
How to erase DTC C1273
To erase DTC C1273, follow these steps:
- Connect an OBD-II scanner to the vehicle’s diagnostic port.
- Turn on the ignition without starting the engine.
- Navigate to the trouble codes section of the scanner.
- Select the option to clear or erase the codes.
- Confirm the action and wait for the scanner to indicate that the codes have been cleared.
- Disconnect the scanner and perform a test drive to ensure the code does not return.
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
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.