P1722 Infiniti Code - Estimated Vehicle Speed Signal
Quick Answer
The P1722 diagnostic trouble code for Infiniti vehicles refers to an issue with the estimated vehicle speed signal. Common causes include Faulty speed sensor: The most common cause of this code is a malfunctioning speed sensor, which may be damaged or worn out, Wiring issues: Problems with the wiring harness connecting the speed sensor to the ECM/TCM can also trigger this code, Faulty ECM/TCM: In rare cases, a malfunctioning engine control module or transmission control module could be the culprit. 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
- P1722 Infiniti indicates Estimated Vehicle Speed Signal.
- Common causes
- Common causes include Faulty speed sensor: The most common cause of this code is a malfunctioning speed sensor, which may be damaged or worn out, Wiring issues: Problems with the wiring harness connecting the speed sensor to the ECM/TCM can also trigger this code, Faulty ECM/TCM: In rare cases, a malfunctioning engine control module or transmission control module could be the culprit.
- 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 P1722 Infiniti Description
The P1722 diagnostic trouble code for Infiniti vehicles refers to an issue with the estimated vehicle speed signal. This code typically indicates that the vehicle's onboard computer is receiving an incorrect or inconsistent signal related to the speed of the vehicle. The vehicle speed signal is crucial for various systems to function properly, such as the transmission, traction control, and cruise control. When the vehicle speed signal is inaccurate or missing, it can lead to poor performance, erratic shifting, and potentially unsafe driving conditions.
Common Causes of P1722 Infiniti
- Faulty speed sensor: The most common cause of this code is a malfunctioning speed sensor, which may be damaged or worn out.
- Wiring issues: Problems with the wiring harness connecting the speed sensor to the ECM/TCM can also trigger this code.
- Faulty ECM/TCM: In rare cases, a malfunctioning engine control module or transmission control module could be the culprit.
- Wheel speed sensor issues: If the vehicle is equipped with wheel speed sensors for the ABS system, issues with these sensors could also trigger this code.
- Mechanical issues: Problems with the transmission, such as a damaged output shaft or gear, could potentially affect the vehicle speed signal.
Symptoms of P1722 Infiniti
- Inaccurate speedometer readings: One of the most common symptoms associated with this code is a speedometer that fluctuates or provides inaccurate readings.
- Harsh shifting: The vehicle may experience harsh or delayed shifting as the transmission control module struggles to determine the correct vehicle speed.
- Loss of cruise control functionality: The vehicle's cruise control system may not function properly if the speed signal is incorrect or missing.
- ABS or traction control issues: Problems with the vehicle speed signal can also affect the operation of the ABS or traction control systems, leading to potential safety concerns.
- Check Engine Light: The Check Engine Light may illuminate on the dashboard due to the detected issue with the vehicle speed signal.
How to Fix P1722 Infiniti
- Diagnose the issue: The first step in addressing this code is to perform a thorough diagnosis to pinpoint the exact cause of the problem. This may involve checking the speed sensor, wiring, and ECM/TCM for any faults.
- Replace the speed sensor: If the speed sensor is found to be faulty, it will need to be replaced with a new, OEM-approved sensor.
- Check and repair wiring: Inspect the wiring harness for any damage or corrosion, and repair or replace any damaged wires as needed.
- Verify ECM/TCM functionality: Ensure that the engine control module and transmission control module are functioning correctly and reprogram them if necessary.
- Test drive and recheck: After completing the repairs, take the vehicle for a test drive to verify that the issue has been resolved. Recheck for any remaining fault codes and address them as needed.
Cost to Fix P1722 Infiniti
The cost of repairing a P1722 code on an Infiniti vehicle can vary depending on the specific cause of the issue and the labor rates in your area. On average, the parts for this repair, such as a new speed sensor, wiring harness, or ECM/TCM, could range from $100 to $500. Labor costs typically add another $150 to $300, bringing the total repair cost to around $250 to $800. However, it's essential to note that these are rough estimates, and actual costs may differ based on the extent of the repairs needed and the rates charged by your chosen auto repair shop. Be sure to inquire about diagnostic time and labor rates when seeking a professional repair service to get a more accurate estimate.
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Frequently Asked Questions about P1722 Infiniti Code
1. What does the OBDII code P1722 mean for an Infiniti?
P1722 indicates an issue with the Estimated Vehicle Speed Signal, which is used by the transmission control system to monitor and manage vehicle speed.
2. What are the common symptoms of the P1722 code in an Infiniti?
Symptoms may include erratic shifting, reduced fuel efficiency, illuminated check engine light, or the transmission going into limp mode.
3. What causes the P1722 code to appear on an Infiniti?
Common causes include a faulty vehicle speed sensor, damaged wiring or connectors, a malfunctioning transmission control module (TCM), or issues within the transmission itself.
4. Can driving with the P1722 code damage my Infiniti?
Yes, driving with this code may cause further damage to the transmission or lead to unsafe driving conditions due to erratic shifting.
5. How is the P1722 code diagnosed in an Infiniti?
A mechanic will typically use a scan tool to confirm the code, inspect the vehicle speed sensor and related wiring, and test the TCM for proper functionality.
6. How do you fix the P1722 code on an Infiniti?
The fix may involve replacing the vehicle speed sensor, repairing damaged wiring or connectors, reprogramming or replacing the transmission control module, or servicing the transmission.
7. How much does it cost to repair the P1722 code on an Infiniti?
The cost varies depending on the root cause but can range from $150 to $400 for sensor replacement and wiring repairs, while TCM replacement may cost significantly more.
8. What tools are required to fix the P1722 code in an Infiniti?
Essential tools include an OBDII scanner, a multimeter for testing electrical components, and potentially specialty tools for accessing and replacing the vehicle speed sensor.
9. Can a P1722 code be triggered by low transmission fluid?
Yes, low or dirty transmission fluid can cause the transmission to malfunction, potentially triggering the P1722 code.
10. Is it safe to clear the P1722 code without fixing the issue?
Clearing the code without addressing the root cause may temporarily hide the problem, but it can lead to further transmission issues and unsafe driving conditions.
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