Subaru OBD-II 1996 & Newer models DTC P1596 – Automatic transmission diagnosis input signal circuit high input
DTC P1596 meaning on Subaru OBD-II 1996 & Newer models
DTC P1596 indicates a high input signal in the automatic transmission diagnosis circuit on Subaru vehicles compliant with OBD-II standards from 1996 onwards.
Subaru OBD-II 1996 & Newer models DTC P1596 symptoms
- Check Engine Light (CEL) illuminated on the dashboard
- Transmission shifting issues
- Reduced fuel efficiency
Subaru OBD-II 1996 & Newer models DTC P1596 causes
- Faulty automatic transmission diagnosis input signal circuit
- Wiring or connector issues in the transmission diagnosis circuit
- Defective transmission control module (TCM)
Subaru OBD-II 1996 & Newer models DTC P1596 seriousness
The seriousness of DTC P1596 lies in the potential transmission operation problems it can cause. Ignoring this issue may lead to further damage to the transmission system.
How to diagnose DTC P1596 on Subaru OBD-II 1996 & Newer models
- Use an OBD-II scanner to retrieve the trouble codes and freeze frame data
- Inspect the automatic transmission diagnosis input signal circuit for any visible damage or loose connections
- Check the TCM for proper operation and communication
How to fix DTC P1596 on Subaru OBD-II 1996 & Newer models
- Repair or replace any damaged wiring or connectors in the transmission diagnosis circuit
- If the TCM is faulty, replace it with a new one
- Clear the trouble codes and perform a test drive to ensure the issue is resolved
How to erase DTC P1596 on Subaru OBD-II 1996 & Newer models
- Use an OBD-II scanner to clear the trouble codes
- Disconnect the vehicle’s battery for a few minutes to reset the system
- After performing the necessary repairs, ensure the issue is resolved before clearing the DTC
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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