U0172 RAM Code - Lost Communication With Left Side Satellite Acceleration Sensor 1
Quick Answer
The U0172 diagnostic trouble code (DTC) indicates that the vehicle's onboard computer has lost communication with the Left Side Satellite Acceleration Sensor 1. Common causes include Faulty Left Side Satellite Acceleration Sensor 1, Damaged wiring or connectors leading to the sensor, Malfunctioning electronic control module (ECM). 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
- U0172 RAM indicates Lost Communication With Left Side Satellite Acceleration Sensor 1.
- Common causes
- Common causes include Faulty Left Side Satellite Acceleration Sensor 1, Damaged wiring or connectors leading to the sensor, Malfunctioning electronic control module (ECM).
- 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 U0172 RAM Description
The U0172 diagnostic trouble code (DTC) indicates that the vehicle's onboard computer has lost communication with the Left Side Satellite Acceleration Sensor 1. This sensor is responsible for measuring the lateral acceleration of the vehicle, which is crucial for various safety systems such as stability control and traction control. When communication with this sensor is lost, it can lead to a range of issues affecting the vehicle's performance and safety.
Common Causes of U0172 RAM
- Faulty Left Side Satellite Acceleration Sensor 1.
- Damaged wiring or connectors leading to the sensor.
- Malfunctioning electronic control module (ECM).
- Communication network issues within the vehicle's system.
- Water or moisture intrusion affecting the sensor or wiring.
Symptoms of U0172 RAM
- Illumination of the traction control or stability control warning light on the dashboard.
- Loss of traction control and stability control functionality.
- Erratic or unpredictable handling during cornering or on slippery surfaces.
- Decreased overall vehicle stability and control.
- Possible rough or jerky acceleration due to compromised sensor data.
How to Fix U0172 RAM
- Begin by conducting a thorough visual inspection of the wiring and connectors leading to the Left Side Satellite Acceleration Sensor 1 to check for any visible damage or corrosion. Repair or replace any damaged components as needed.
- Use a diagnostic scan tool to retrieve the trouble codes and data related to the U0172 code. This will help pinpoint the exact cause of the communication loss and guide further troubleshooting.
- Test the Left Side Satellite Acceleration Sensor 1 for proper functionality using a multimeter or oscilloscope. Replace the sensor if it fails the test.
- Check the electronic control module (ECM) for any signs of malfunction or communication issues. Repair or replace the ECM if necessary.
- Clear the DTCs from the vehicle's computer memory using the diagnostic scan tool and perform a test drive to ensure that the issue has been resolved.
Cost to Fix U0172 RAM
The typical repair costs for addressing the U0172 code can vary depending on the specific cause of the issue and the vehicle's make and model. In general, the cost of replacing a Left Side Satellite Acceleration Sensor 1 can range from $100 to $300, including parts and labor. Additional costs may be incurred if other components such as wiring or the ECM need to be repaired or replaced.
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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service
- Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
- Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
- Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
- Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
Frequently Asked Questions about U0172 RAM Code
1. What does OBDII code U0172 mean on a RAM vehicle?
Code U0172 indicates a loss of communication with the left side satellite acceleration sensor 1, which is part of the vehicle's stability control system.
2. What are the common symptoms of code U0172 on a RAM?
Symptoms may include the ABS or traction control warning lights turning on, stability control features being disabled, or no noticeable symptoms at all.
3. What causes the U0172 code to appear on a RAM?
Common causes include a faulty acceleration sensor, damaged wiring or connectors, a blown fuse, or a failure in the control module.
4. Can I drive my RAM with the U0172 code active?
While the vehicle may still be drivable, stability control and traction control systems may be compromised, increasing the risk of losing control in slippery conditions.
5. How do you diagnose the U0172 code on a RAM?
Diagnosis typically involves scanning the vehicle with an OBDII tool, checking for power and ground at the sensor, inspecting wiring and connectors, and testing the sensor for proper function.
6. How do you fix the U0172 code on a RAM?
Repairs may include replacing the left side satellite acceleration sensor, repairing damaged wiring or connectors, or updating/replacing the control module if needed.
7. What tools are needed to fix the U0172 code on a RAM?
A diagnostic scanner, multimeter, and basic hand tools are usually required. In some cases, specialized equipment may be necessary to reprogram modules.
8. How much does it cost to repair the U0172 code on a RAM?
Repair costs can vary, ranging from $100–$300 for sensor replacement to $500 or more if a module needs to be replaced or reprogrammed.
9. Is the U0172 code specific to RAM vehicles?
No, the U0172 code can appear on other makes and models, but its meaning and repair procedures may vary slightly depending on the vehicle.
10. Can a weak battery cause the U0172 code on a RAM?
Yes, a weak or failing battery can cause communication errors like U0172 by interrupting power to the sensor or control module.
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