p1748 Peugeot | What It Means & How to Fix

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Vehicle engine and/or automatic transmission

Code: P1748 - The EPC (Electronic Power Control) system is malfunctioning, which may affect engine or transmission performance.

The P1748 error on a Peugeot is related to the Electronic Power Control (EPC) system. This issue can interfere with throttle performance, which may result in slower acceleration or the car entering limp mode. It’s not usually an urgent problem, but it’s a good idea to have it checked out sooner rather than later to prevent any bigger issues from cropping up.

💡 Limp mode is a safety feature in cars that limits the engine's power and speed to prevent further damage when the car detects a serious issue. It allows you to drive, but at reduced performance, until the problem is fixed.

Causes of P1748 Error Code on a Peugeot

Throttle body malfunction - Problems with the throttle position sensor or actuator.
Wiring issues - Damaged or corroded wiring in the EPC circuit.
Faulty sensors - Issues with sensors like the throttle position sensor or pedal position sensor.
ECU problems - A malfunction in the engine control unit (ECU) that manages the EPC system.
Vacuum leaks - Leaks in the intake system that affect throttle response.

It’s best to have the system checked to identify the exact cause.

Symptoms of DTC p1748 on a Peugeot

If your Peugeot is showing the DTC p1748 error code, you may experience the following symptoms:

Sluggish acceleration - The car may be slow to respond when you press the gas pedal.
Limp mode - The vehicle may enter a reduced power mode to prevent further damage, limiting speed and acceleration.
Check engine light - The check engine light may illuminate on the dashboard.
Unusual engine behavior - You may notice the engine running rough or irregularly.
Reduced fuel efficiency - The car may consume more fuel than usual due to poor throttle control.

How Serious is DTC p1748 on a Peugeot?

The p1748 error code can be a serious issue if ignored. Problems with the Electronic Power Control (EPC) system can cause your car to lose power, accelerate slowly, or consume more fuel than usual. In the worst case, it could trigger "limp mode," which limits the car’s speed and performance to prevent further damage.

If you don’t take care of it, the problem could worsen, leading to more expensive repairs or even leaving you stranded. It’s a good idea to have it checked out sooner rather than later.

Conclusion

The DTC p1748 error on a Peugeot, indicating an issue with the Electronic Power Control (EPC) system, shouldn’t be ignored. While it may not cause immediate breakdowns, it can lead to reduced performance, poor acceleration, and higher fuel consumption. If the issue escalates, it could trigger limp mode, limiting your car's capabilities. To avoid more severe problems and costly repairs, it’s best to have the car diagnosed and fixed promptly.

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