What Does the P2139 Code Mean?
The P2139 code indicates a voltage correlation issue between the Throttle Position Sensor (TPS) and the Accelerator Pedal Position (APP) sensor. These sensors work together to inform the Engine Control Module (ECM) about the driver’s requested speed and acceleration.
What Causes the P2139 Code?
Several factors can trigger the P2139 code, including:
- Accelerator Pedal Position (APP) assembly failure
- Throttle Position Sensor (TPS) failure
- Powertrain Control Module (PCM) failure
- Wiring issues between the sensors and the PCM
What Are the Symptoms of the P2139 Code?
The most common symptoms associated with the P2139 code include:
- Decreased engine performance
- Engine may enter limp home mode (reduced performance)
How Serious Is the P2139 Code?
The P2139 code is classified as urgent. Ignoring this issue can lead to significant engine performance problems and potentially dangerous driving conditions. The vehicle may limit its speed to 20 mph or less to prevent damage.
How to Diagnose the P2139 Code
To diagnose the P2139 code, a mechanic will typically perform the following steps:
- Use an OBD-II scanner to confirm the code and check for any related codes.
- Inspect the Throttle Position Sensor and Accelerator Pedal Position Sensor for damage or wear.
- Check the wiring and connectors for any signs of corrosion or loose connections.
- Test the sensors to ensure they are functioning within the specified voltage range.
Common Repairs for the P2139 Code
Repairs for the P2139 code may include:
- Replacing the Accelerator Pedal Position (APP) assembly
- Replacing the Throttle Position Sensor (TPS)
- Repairing or replacing damaged wiring or connectors
- Reprogramming or replacing the Powertrain Control Module (PCM)
How Much Does It Cost to Fix the P2139 Code?
The cost to fix the P2139 code can vary widely depending on the underlying issue. On average, repairs can range from $100 to $1,000 or more, including parts and labor. Always get a detailed estimate from your mechanic.
Can I Fix the P2139 Code Myself?
While some experienced DIY mechanics may be able to tackle repairs related to the P2139 code, it is essential to have a good understanding of automotive systems and access to diagnostic tools. If you’re unsure, it’s best to consult a professional mechanic to ensure the problem is properly diagnosed and repaired.
