P1704 Hyundai Code - Throttle Position Sensor High Input
Quick Answer
The P1704 Hyundai code indicates a high input signal from the throttle position sensor (TPS). Common causes include Faulty throttle position sensor, Damaged wiring harness, Poor connection between sensor and ECU. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1704 Hyundai indicates Throttle Position Sensor High Input.
- Common causes
- Common causes include Faulty throttle position sensor, Damaged wiring harness, Poor connection between sensor and ECU.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1704 Hyundai Description
The P1704 Hyundai code indicates a high input signal from the throttle position sensor (TPS). The throttle position sensor is a crucial component of the vehicle's fuel injection system, as it monitors the position of the throttle pedal and sends this information to the engine control unit (ECU). The ECU uses this data to determine the optimal air-fuel mixture for combustion in the engine. When the TPS sends a high input signal, it means that it is reporting a throttle position that is higher than expected by the ECU. This can lead to a variety of performance issues and potentially cause long-term damage if left unaddressed.
Common Causes of P1704 Hyundai
- Faulty throttle position sensor
- Damaged wiring harness
- Poor connection between sensor and ECU
- Software glitch in the ECU
- Issue with the throttle body
Symptoms of P1704 Hyundai
- Engine stalling or hesitation during acceleration
- Rough idling or surging
- Poor fuel efficiency
- Check Engine Light illuminated
- Difficulty maintaining a constant speed
How to Fix P1704 Hyundai
- Diagnose the issue using a diagnostic scanner to confirm the P1704 code and pinpoint the exact cause of the high input signal.
- Inspect the throttle position sensor, wiring harness, and connections for any visible damage or wear.
- Test the throttle position sensor using a multimeter to check for proper voltage output.
- Replace the throttle position sensor if it is found to be faulty, damaged, or not functioning correctly.
- Clear the error code and reset the ECU to ensure the repair was successful and the issue is resolved.
Cost to Fix P1704 Hyundai
The typical repair costs for addressing a high input signal from the throttle position sensor can range from $150 to $300, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. While most auto repair shops charge between $80 and $150 per hour, rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's recommended to check local rates for a more accurate estimate before proceeding with the repair.
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Frequently Asked Questions about P1704 Hyundai Code
1. What does the OBDII code P1704 mean on a Hyundai?
The P1704 code on a Hyundai indicates a "Throttle Position Sensor High Input," meaning the throttle position sensor (TPS) is sending a signal voltage that is higher than expected by the engine control module (ECM).
2. What are the common symptoms of the P1704 code?
Symptoms may include poor engine performance, hesitation during acceleration, erratic idle, reduced fuel efficiency, or the check engine light being illuminated.
3. What causes the P1704 code in a Hyundai?
Common causes include a faulty throttle position sensor, damaged or corroded wiring, a poor electrical connection, or issues with the ECM.
4. Can I drive my Hyundai with a P1704 code?
While the car may still be drivable, driving with a P1704 code can lead to reduced performance and potential damage to other components. It’s best to address the issue promptly.
5. How do I diagnose the P1704 code on my Hyundai?
Diagnosis involves scanning for codes, inspecting the throttle position sensor and its wiring, checking for loose or corroded connections, and testing the sensor's voltage output with a multimeter.
6. How is the P1704 code fixed?
Repairs may include replacing the faulty throttle position sensor, repairing or replacing damaged wiring, cleaning corroded connections, or in rare cases, reprogramming or replacing the ECM.
7. How much does it cost to fix the P1704 code on a Hyundai?
The repair cost depends on the issue. Replacing a throttle position sensor can cost $100–$300, including parts and labor, while wiring repairs may vary.
8. Can a dirty throttle body cause the P1704 code?
A dirty throttle body is unlikely to directly cause this code but can contribute to other throttle-related performance issues that might trigger additional codes.
9. How do I prevent the P1704 code from returning?
Regular maintenance, such as inspecting and cleaning the throttle body, checking electrical connections, and addressing issues promptly, can help prevent the code from reappearing.
10. Will resetting the check engine light fix the P1704 code?
Resetting the light may temporarily clear the code, but if the underlying issue isn’t resolved, the code and symptoms will likely return.
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