P1120 – Subaru OBD-II 1996 & Newer models DTC

Subaru OBD-II 1996 & Newer models DTC P1120 – Starter Switch High Input

DTC P1120 meaning on Subaru OBD-II 1996 & Newer models

The DTC P1120 code on Subaru OBD-II 1996 & newer models indicates a high input signal from the starter switch. This means that the Engine Control Module (ECM) has detected an abnormal voltage level from the starter switch circuit.

Subaru OBD-II 1996 & Newer models DTC P1120 symptoms

Some common symptoms associated with DTC P1120 on Subaru vehicles may include:

• Difficulty starting the engine
• Engine not cranking when the key is turned
• Check Engine Light (CEL) illuminated on the dashboard

Subaru OBD-II 1996 & Newer models DTC P1120 causes

The high input signal from the starter switch that triggers DTC P1120 on Subaru vehicles can be caused by various factors, including:

• Faulty starter switch
• Wiring issues in the starter switch circuit
• Corrosion or poor connections in the starter switch circuit

Subaru OBD-II 1996 & Newer models DTC P1120 seriousness

DTC P1120 on Subaru OBD-II 1996 & newer models should be addressed promptly as it can lead to starting issues and potential vehicle immobilization. Ignoring this code may result in inconvenience and possible safety concerns.

How to diagnose DTC P1120 on Subaru OBD-II 1996 & Newer models

To diagnose DTC P1120 on Subaru vehicles, a mechanic can perform the following steps:

1. Use an OBD-II scanner to retrieve the trouble codes
2. Inspect the starter switch and its wiring for any visible damage or corrosion
3. Test the starter switch for proper functionality using a multimeter
4. Check for continuity and voltage in the starter switch circuit

How to fix DTC P1120 on Subaru OBD-II 1996 & Newer models

To fix DTC P1120 on Subaru vehicles, the following steps can be taken:

1. Replace the faulty starter switch if it is determined to be the cause
2. Repair any damaged or corroded wiring in the starter switch circuit
3. Ensure all connections in the starter switch circuit are secure and free of debris
4. Clear the trouble codes using an OBD-II scanner after the repair

How to erase DTC P1120 on Subaru OBD-II 1996 & Newer models

To erase DTC P1120 on Subaru OBD-II 1996 & newer models, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port
2. Access the scanner’s menu to clear the trouble codes
3. Follow the on-screen prompts to erase the DTC P1120 code
4. Once the code is cleared, disconnect the scanner and start the vehicle to ensure the code does not return

Recommended tools for Subaru OBD-II 1996 & Newer models diagnostics

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

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