U0172 RAM Code - Lost Communication With Left Side Satellite Acceleration Sensor 1
Quick Answer
The impact sensors perform their own self-test using power supplied by the Occupant Restraint Controller (ORC) then communicate this status back to the ORC with periodic updates. Common causes include Faulty Left Side Impact Sensor 1, Left Side Impact Sensor 1 harness is open or shorted, Left Side Impact Sensor 1 circuit poor electrical connection. 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 Impact Sensor 1, Left Side Impact Sensor 1 harness is open or shorted, Left Side Impact Sensor 1 circuit poor electrical connection.
- 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.
Code U0172 RAM Description
What are the Possible Causes of the DTC U0172 RAM?
- Faulty Left Side Impact Sensor 1
- Left Side Impact Sensor 1 harness is open or shorted
- Left Side Impact Sensor 1 circuit poor electrical connection
- Faulty Occupant Restraint Controller (ORC)
How to Fix the DTC U0172 RAM?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U0172 RAM code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the U0172 RAM code?
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Get the U0172 RAM code diagnosed by a professional: Find a repair shop in your area
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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