Subaru OBD-II 1996 & Newer models DTC P1143 – Pressure Sensor Circuit Low Input
DTC P1143 meaning on Subaru OBD-II 1996 & Newer models
DTC P1143 on Subaru OBD-II 1996 & Newer models indicates a low input signal from the pressure sensor circuit. This means that the pressure sensor is reporting a pressure reading that is lower than expected by the engine control module.
Subaru OBD-II 1996 & Newer models DTC P1143 symptoms
- Check Engine Light (CEL) illuminated on the dashboard
- Decreased engine performance
- Possible fuel economy reduction
Subaru OBD-II 1996 & Newer models DTC P1143 causes
- Malfunctioning pressure sensor
- Wiring or connector issues in the pressure sensor circuit
- Low engine oil level or pressure
Subaru OBD-II 1996 & Newer models DTC P1143 seriousness
The seriousness of DTC P1143 on Subaru OBD-II 1996 & Newer models can vary. While it may not cause immediate engine failure, ignoring this issue can lead to potential engine damage or poor performance over time.
How to diagnose DTC P1143 on Subaru OBD-II 1996 & Newer models
- Use an OBD-II scanner to retrieve the trouble code and freeze frame data
- Inspect the pressure sensor and its wiring for any visible damage or corrosion
- Check the engine oil level and pressure to ensure they are within specifications
How to fix DTC P1143 on Subaru OBD-II 1996 & Newer models
- Replace the pressure sensor if it is found to be faulty
- Repair any damaged wiring or connectors in the pressure sensor circuit
- Ensure the engine oil level and pressure are at the correct levels
How to erase DTC P1143 on Subaru OBD-II 1996 & Newer models
- Use an OBD-II scanner to clear the trouble code and reset the Check Engine Light
- Ensure that the underlying issue causing DTC P1143 has been resolved before clearing the code
Recommended tools for Subaru OBD-II 1996 & Newer models 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.