Audi DTC P1787 – Reversing Light Circuit Short to Ground
DTC P1787 meaning on Audi
DTC P1787 on an Audi indicates a fault in the reversing light circuit, specifically a short to ground. This fault is related to the circuit that controls the reversing lights on the vehicle.
Audi DTC P1787 symptoms
Symptoms of DTC P1787 on an Audi may include:
- Reversing lights not working
- Reverse gear indicator not lighting up
- Check Engine Light (CEL) illuminated on the dashboard
Audi DTC P1787 causes
Common causes of DTC P1787 on an Audi include:
- Short to ground in the reversing light circuit
- Faulty reversing light switch
- Corroded or damaged wiring in the circuit
Audi DTC P1787 seriousness
While DTC P1787 is not a critical issue that affects the drivability of the vehicle, it is important to address it promptly as it can impact the safety of reversing maneuvers, especially in low light conditions.
How to diagnose DTC P1787 on Audi
To diagnose DTC P1787 on an Audi, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault code
- Inspect the reversing light circuit for any visible damage or corrosion
- Check the reversing light switch for proper operation
- Perform a continuity test on the wiring in the circuit
How to fix DTC P1787 on Audi
To fix DTC P1787 on an Audi, you can try the following:
- Repair any damaged or corroded wiring in the reversing light circuit
- Replace the reversing light switch if faulty
- Clear the fault code using a diagnostic scanner after the repair
How to erase DTC P1787 on Audi
To erase DTC P1787 on an Audi, you can use a diagnostic scanner to clear the fault code from the vehicle’s memory. Make sure the underlying issue causing the fault code has been addressed before clearing it.
Recommended tools for Audi 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.