C1556 RAM Code - Ride Height Air Pressure Sensor
Quick Answer
The Air Suspension Control Module (ASCM) monitors the Ride Height Air Pressure Sensor. Common causes include Faulty Ride Height Air Pressure Sensor, Ride Height Air Pressure Sensor harness is open or shorted, Ride Height Air Pressure Sensor 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
- C1556 RAM indicates Ride Height Air Pressure Sensor.
- Common causes
- Common causes include Faulty Ride Height Air Pressure Sensor, Ride Height Air Pressure Sensor harness is open or shorted, Ride Height Air Pressure Sensor 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 C1556 RAM Description
What are the Possible Causes of the DTC C1556 RAM?
- Faulty Ride Height Air Pressure Sensor
- Ride Height Air Pressure Sensor harness is open or shorted
- Ride Height Air Pressure Sensor circuit poor electrical connection
- Faulty Air Suspension Control Module (ASCM)
How to Fix the DTC C1556 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.
Code Tech Notes
C1556-14-RIDE HEIGHT AIR PRESSURE SENSOR - CIRCUIT SHORT TO GROUND OR OPEN
C1556-96-RIDE HEIGHT AIR PRESSURE SENSOR - COMPONENT INTERNAL FAILURE
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C1556 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.
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Frequently Asked Questions about C1556 RAM Code
1. What does the OBDII code C1556 mean on a RAM vehicle?
C1556 indicates an issue with the Ride Height Air Pressure Sensor, which monitors the air pressure in the suspension system to maintain proper ride height.
2. What are the common symptoms of code C1556 in a RAM?
Symptoms include uneven ride height, suspension warning lights on the dashboard, poor ride quality, or the air suspension system not functioning properly.
3. What causes the C1556 code to appear?
Common causes include a faulty ride height air pressure sensor, damaged wiring or connectors, air leaks in the suspension system, or a malfunctioning air suspension control module.
4. Can I drive my RAM with the C1556 code active?
While the vehicle may still be drivable, driving with this code can lead to poor handling, uneven wear on tires, and potential damage to the suspension system. It's best to address the issue promptly.
5. How can I fix the C1556 code on my RAM?
Start by inspecting the ride height air pressure sensor and its wiring for damage or corrosion. Replace the sensor if it's faulty, and ensure there are no air leaks in the suspension system.
6. How do I test the ride height air pressure sensor on my RAM?
Use a multimeter to check the sensor's voltage and resistance against manufacturer specifications. If readings are outside the range, the sensor may need replacement.
7. Can a faulty air suspension module cause the C1556 code?
Yes, a malfunctioning air suspension control module can fail to process correct sensor data, triggering the C1556 code.
8. How much does it cost to repair the C1556 code on a RAM?
Repair costs vary but typically range from $100 to $300 for a sensor replacement. Additional costs may apply if wiring or the air suspension module also needs repair.
9. Will clearing the C1556 code with a scan tool fix the problem?
Clearing the code will remove it temporarily, but the underlying issue must be addressed to prevent the code from returning.
10. Are there any recalls related to the C1556 code on RAM vehicles?
Check with your local dealership or the NHTSA website to see if your specific RAM model has recalls affecting the air suspension system.
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