Volkswagen DTC P1639 – Accelerator Pedal Position Sensor 1/2 Range Performance
DTC P1639 meaning on Volkswagen
The Diagnostic Trouble Code (DTC) P1639 for Volkswagen indicates a performance issue with the Accelerator Pedal Position Sensor 1/2 Range. This means that the signal from the accelerator pedal position sensor is not within the expected range, which can affect the engine’s performance and drivability.
Volkswagen DTC P1639 symptoms
Symptoms of DTC P1639 on a Volkswagen may include:
- Reduced engine power
- Acceleration hesitation
- Check Engine Light (CEL) illuminated on the dashboard
- Difficulty maintaining a constant speed
Volkswagen DTC P1639 causes
The common causes of DTC P1639 on a Volkswagen are:
- Defective accelerator pedal position sensor
- Wiring or connector issues in the accelerator pedal position sensor circuit
- Electronic control module (ECM) software or hardware problems
Volkswagen DTC P1639 seriousness
The seriousness of DTC P1639 on a Volkswagen depends on the extent of the issue. While the vehicle may still be operable with reduced performance, it is important to address the problem promptly to prevent further damage and ensure safe driving conditions.
How to diagnose DTC P1639 on Volkswagen
To diagnose DTC P1639 on a Volkswagen, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s ECM.
- Inspect the wiring and connectors related to the accelerator pedal position sensor for any visible damage or corrosion.
- Test the accelerator pedal position sensor using a multimeter to check for proper voltage and resistance values.
- Perform a thorough inspection of the ECM for any signs of malfunction.
How to fix DTC P1639 on Volkswagen
To fix DTC P1639 on a Volkswagen, you can try the following solutions:
- Replace the faulty accelerator pedal position sensor with a new one.
- Repair or replace any damaged wiring or connectors in the sensor circuit.
- If the issue persists, consider reprogramming or replacing the ECM.
How to erase DTC P1639 on Volkswagen
To erase DTC P1639 on a Volkswagen, you can use a diagnostic scanner to clear the fault codes stored in the ECM. After addressing the underlying issue and fixing the problem, clearing the codes will reset the Check Engine Light and ensure that the vehicle’s ECM no longer detects the fault.
Recommended tools for Volkswagen 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.