Hello, I have a Ram 3500 6.7 with RAM Air Suspension. It holds air fine, levels the way it should when under a load, but I am getting a "Service Air Suspension System" warning that dings and pops up on the gauges every time. It only pops up for about half a second and then goes away but pops right back up. It will do this every second or two for several minutes or sometimes hours on end. If I have my 5th wheel in tow, or if I am unloaded, it is not as prevalent, maybe just when I hit a bump. If I am unloaded but have passengers in the back seat or even just suitcases in the back seat, it is constant. Extremely annoying! My guess is a bad ground somewhere. It spent several days in the shop, but nothing was ever found. Has anyone ever come across this or have any other ideas?
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JayCo78
RAM Air Suspension Service Required Warning
Hello, I have a Ram 3500 6.7 with RAM Air Suspension. It holds air fine, levels the way it should when under a load, but I am getting a "Service Air Suspension System" warning that dings and pops up on the gauges every time. It only pops up for about half a second and then goes away but pops right back up. It will do this every second or two for several minutes or sometimes hours on end. If I have my 5th wheel in tow, or if I am unloaded, it is not as prevalent, maybe just when I hit a bump. If I am unloaded but have passengers in the back seat or even just suitcases in the back seat, it is constant. Extremely annoying! My guess is a bad ground somewhere. It spent several days in the shop, but nothing was ever found. Has anyone ever come across this or have any other ideas?
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Thanks for posting this…in my search for a late model Grand Cherokee 5.7 Hemi I found that nearly every one had air suspension. I read mixed results on Jeepforum.com some had no problems some had repeated expensive problems (leaks causing the pump to run overtime and burn out). Given the complexity of the system & cost of repair I decided it’s something I really don’t want. It is of limited use to me; I can put air bags in the rear coils if I want load leveling for towing.
Im still looking for a late model WK-2 Limited with Hemi & no air suspension….
Im still looking for a late model WK-2 Limited with Hemi & no air suspension….
Welcome to Allpar. What year?
That service message usually means that a fault code is stored in the ASCM.
These aren't OBD2 codes, so a capable scan tool will be necessary.
Possible faults:
MODULE, Air Suspension Control (ASCM)
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That service message usually means that a fault code is stored in the ASCM.
These aren't OBD2 codes, so a capable scan tool will be necessary.
Possible faults:
MODULE, Air Suspension Control (ASCM)
- Diagnosis and Testing
- C1526-11-LEFT REAR RIDE HEIGHT SENSOR-CIRCUIT SHORT TO GROUND
- C1526-15-LEFT REAR RIDE HEIGHT SENSOR-CIRCUIT SHORT TO BATTERY OR OPEN
- C1526-1F-LEFT REAR RIDE HEIGHT SENSOR-CIRCUIT INTERMITTENT
- C1526-21-LEFT REAR RIDE HEIGHT SENSOR-SIGNAL AMPLITUDE < MINIMUM
- C1526-22-LEFT REAR RIDE HEIGHT SENSOR-SIGNAL AMPLITUDE > MAXIMUM
- C1526-25-LEFT REAR RIDE HEIGHT SENSOR-SIGNAL SHAPE / WAVEFORM FAILURE
- C1526-27-LEFT REAR RIDE HEIGHT SENSOR-SIGNAL RATE OF CHANGE ABOVE THRESHOLD
- C1526-38-LEFT REAR RIDE HEIGHT SENSOR-SIGNAL FREQUENCY INCORRECT
- C1526-79-LEFT REAR RIDE HEIGHT SENSOR-MECHANICAL LINKAGE FAILURE
- C152A-11-RIGHT REAR RIDE HEIGHT SENSOR-CIRCUIT SHORT TO GROUND
- C152A-15-RIGHT REAR RIDE HEIGHT SENSOR-CIRCUIT SHORT TO BATTERY OR OPEN
- C152A-1F-RIGHT REAR RIDE HEIGHT SENSOR-CIRCUIT INTERMITTENT
- C152A-21-RIGHT REAR RIDE HEIGHT SENSOR-SIGNAL AMPLITUDE < MINIMUM
- C152A-22-RIGHT REAR RIDE HEIGHT SENSOR-SIGNAL AMPLITUDE > MAXIMUM
- C152A-25-RIGHT REAR RIDE HEIGHT SENSOR-SIGNAL SHAPE / WAVEFORM FAILURE
- C152A-27-RIGHT REAR RIDE HEIGHT SENSOR-SIGNAL RATE OF CHANGE ABOVE THRESHOLD
- C152A-38-RIGHT REAR RIDE HEIGHT SENSOR-SIGNAL FREQUENCY INCORRECT
- C152A-79-RIGHT REAR RIDE HEIGHT SENSOR-MECHANICAL LINKAGE FAILURE
- C1540-11-LEFT REAR RIDE HEIGHT LEVEL CONTROL-CIRCUIT SHORT TO GROUND
- C1540-12-LEFT REAR RIDE HEIGHT LEVEL CONTROL-CIRCUIT SHORT TO BATTERY
- C1540-13-LEFT REAR RIDE HEIGHT LEVEL CONTROL-CIRCUIT OPEN
- C1543-11-RIGHT REAR RIDE HEIGHT LEVEL CONTROL-CIRCUIT SHORT TO GROUND
- C1543-12-RIGHT REAR RIDE HEIGHT LEVEL CONTROL-CIRCUIT SHORT TO BATTERY
- C1543-13-RIGHT REAR RIDE HEIGHT LEVEL CONTROL-CIRCUIT OPEN
- C1556-12-RIDE HEIGHT AIR PRESSURE SENSOR 1-CIRCUIT SHORT TO BATTERY
- C1556-14-RIDE HEIGHT AIR PRESSURE SENSOR 1-CIRCUIT SHORT TO GROUND OR OPEN
- C1556-16-RIDE HEIGHT AIR PRESSURE SENSOR 1-CIRCUIT VOLTAGE BELOW THRESHOLD
- C1556-17-RIDE HEIGHT AIR PRESSURE SENSOR 1-CIRCUIT VOLTAGE ABOVE THRESHOLD
- C1556-64-RIDE HEIGHT AIR PRESSURE SENSOR 1-SIGNAL PLAUSIBILITY FAILURE
- C155A-16-RIDE HEIGHT RESERVOIR CONTROL-CIRCUIT VOLTAGE BELOW THRESHOLD
- C155A-17-RIDE HEIGHT RESERVOIR CONTROL-CIRCUIT VOLTAGE ABOVE THRESHOLD
- C155E-11-RIDE HEIGHT PRESSURE VENT CONTROL-CIRCUIT SHORT TO GROUND
- C155E-12-RIDE HEIGHT PRESSURE VENT CONTROL-CIRCUIT SHORT TO BATTERY
- C155E-13-RIDE HEIGHT PRESSURE VENT CONTROL-CIRCUIT OPEN
- C1562-07-RIDE HEIGHT AIR PUMP CONTROL-MECHANICAL FAILURES
- C1562-11-RIDE HEIGHT AIR PUMP CONTROL-CIRCUIT SHORT TO GROUND
- C1562-12-RIDE HEIGHT AIR PUMP CONTROL-CIRCUIT SHORT TO BATTERY
- C1562-13-RIDE HEIGHT AIR PUMP CONTROL-CIRCUIT OPEN
- C1562-16-RIDE HEIGHT AIR PUMP CONTROL-CIRCUIT VOLTAGE BELOW THRESHOLD
- C1562-71-RIDE HEIGHT AIR PUMP CONTROL-ACTUATOR STUCK
- C1562-98-RIDE HEIGHT AIR PUMP CONTROL-COMPONENT OR SYSTEM OVER TEMPERATURE
- C1566-92-LEFT REAR RIDE HEIGHT LEVEL PERFORMANCE-PERFORMANCE OR INCORRECT OPERATION
- C1567-92-RIGHT REAR RIDE HEIGHT LEVEL PERFORMANCE-PERFORMANCE OR INCORRECT OPERATION
- C156C-7A-RIDE HEIGHT SYSTEM AIR LEAK-FLUID LEAK OR SEAL FAILURE
- C156D-7A-RIDE HEIGHT RESERVOIR AIR LEAK-FLUID LEAK OR SEAL FAILURE
- C156E-00-RIDE HEIGHT SYSTEM CALIBRATION PERFORMANCE-
- C159E-11-AIR PUMP TEMPERATURE SENSOR 1-CIRCUIT SHORT TO GROUND
- C159E-15-AIR PUMP TEMPERATURE SENSOR 1-CIRCUIT SHORT TO BATTERY OR OPEN
- C15A1-00-UNABLE TO OBTAIN DESIRED RIDE HEIGHT-
- C15A8-2A-AIR SUSPENSION DOWN BUTTON-STUCK
- C15AF-11-LOW SIDE DRIVER-CIRCUIT SHORT TO GROUND
- C15AF-12-LOW SIDE DRIVER-CIRCUIT SHORT TO BATTERY
- C15C0-16-AIR SUSPENSION-CIRCUIT VOLTAGE BELOW THRESHOLD
- C15C0-17-AIR SUSPENSION-CIRCUIT VOLTAGE ABOVE THRESHOLD
- C15C0-98-AIR SUSPENSION-COMPONENT OR SYSTEM OVER TEMPERATURE
- C15D9-00-LOW AIR MASS
- C15DA-00-PAYLOAD LIMIT EXCEEDED
- C15DD-11-AIR SUSPENSION RESERVOIR SOLENOID-CIRCUIT SHORT TO GROUND
- C15DD-12-AIR SUSPENSION RESERVOIR SOLENOID-CIRCUIT SHORT TO BATTERY
- C15DD-13-AIR SUSPENSION RESERVOIR SOLENOID-CIRCUIT OPEN
- C15DD-72-AIR SUSPENSION RESERVOIR SOLENOID-ACTUATOR STUCK OPEN
- C15DD-73-AIR SUSPENSION RESERVOIR SOLENOID-ACTUATOR STUCK CLOSED
- C15DD-98-AIR SUSPENSION RESERVOIR SOLENOID-COMPONENT OR SYSTEM OVER TEMPERATURE
- C15DE-16-AIR SUSPENSION EXHAUST SOLENOID-CIRCUIT VOLTAGE BELOW THRESHOLD
- C15DE-17-AIR SUSPENSION EXHAUST SOLENOID-CIRCUIT VOLTAGE ABOVE THRESHOLD
- C15DE-4B-AIR SUSPENSION EXHAUST SOLENOID-OVER TEMPERATURE
- C15DE-72-AIR SUSPENSION EXHAUST SOLENOID-ACTUATOR STUCK OPEN
- C15DE-73-AIR SUSPENSION EXHAUST SOLENOID-ACTUATOR STUCK CLOSED
- C15E1-63-LEFT REAR AIR SPRING INTAKE-CIRCUIT / COMPONENT PROTECTION TIME-OUT
- C15E1-97-LEFT REAR AIR SPRING INTAKE-COMPONENT OR SYSTEM OPERATION OBSTRUCTED OR BLOCKED
- C15E2-63-RIGHT REAR AIR SPRING INTAKE-CIRCUIT / COMPONENT PROTECTION TIME-OUT
- C15E2-97-RIGHT REAR AIR SPRING INTAKE-COMPONENT OR SYSTEM OPERATION OBSTRUCTED OR BLOCKED
- C15E3-97-LEFT REAR AIR SPRING EXHAUST-COMPONENT OR SYSTEM OPERATION OBSTRUCTED OR BLOCKED
- C15E4-97-RIGHT REAR AIR SPRING EXHAUST-COMPONENT OR SYSTEM OPERATION OBSTRUCTED OR BLOCKED
- C15E5-7A-LEFT REAR AIR SPRING-FLUID LEAK OR SEAL FAILURE
- C15E5-F0-LEFT REAR AIR SPRING-PRESSURE ABOVE THRESHOLD
- C15E5-F1-LEFT REAR AIR SPRING-PRESSURE BELOW THRESHOLD
- C15E6-7A-RIGHT REAR AIR SPRING-FLUID LEAK OR SEAL FAILURE
- C15E6-F0-RIGHT REAR AIR SPRING-PRESSURE ABOVE THRESHOLD
- C15E6-F1-RIGHT REAR AIR SPRING-PRESSURE BELOW THRESHOLD
- C2110-11-SENSOR SUPPLY 1 VOLTAGE-CIRCUIT SHORT TO GROUND
- C2110-12-SENSOR SUPPLY 1 VOLTAGE-CIRCUIT SHORT TO BATTERY
- C211B-92-IGNITION RUN/START INPUT-PERFORMANCE OR INCORRECT OPERATION
- C2125-11-SENSOR SUPPLY 2 VOLTAGE-CIRCUIT SHORT TO GROUND
- C2125-12-SENSOR SUPPLY 2 VOLTAGE-CIRCUIT SHORT TO BATTERY
- C2129-16-BATTERY VOLTAGE-CIRCUIT VOLTAGE BELOW THRESHOLD
- C2129-17-BATTERY VOLTAGE-CIRCUIT VOLTAGE ABOVE THRESHOLD
- C212C-11-SUSPENSION VALVE POWER SUPPLY VOLTAGE-CIRCUIT SHORT TO GROUND
- C212C-12-SUSPENSION VALVE POWER SUPPLY VOLTAGE-CIRCUIT SHORT TO BATTERY
- C2202-00-ORIGINAL VIN MISMATCH/MISSING
- C2206-00-VEHICLE CONFIGURATION MISMATCH
- C220C-16-ACTIVE SUSPENSION MODULE INTERNAL-CIRCUIT VOLTAGE BELOW THRESHOLD
- C220C-17-ACTIVE SUSPENSION MODULE INTERNAL-CIRCUIT VOLTAGE ABOVE THRESHOLD
- C220C-46-ACTIVE SUSPENSION MODULE INTERNAL-CALIBRATION / PARAMETER MEMORY FAILURE
- C220C-47-ACTIVE SUSPENSION MODULE INTERNAL-WATCHDOG / SAFETY µC FAILURE
- C220C-48-ACTIVE SUSPENSION MODULE INTERNAL-SUPERVISION SOFTWARE FAILURE
- C2212-00-ECU IN - PLANT MODE
- U0001-00-CAN C BUS
- U0100-00-LOST COMMUNICATION WITH ECM/PCM "A"
- U0101-00-LOST COMMUNICATION WITH TCM
- U0102-00-LOST COMMUNICATION WITH TRANSFER CASE CONTROL MODULE / AWD
- U0121-00-LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE "A"
- U0140-00-LOST COMMUNICATION WITH BODY CONTROL MODULE
- U0155-00-LOST COMMUNICATION WITH CLUSTER/CCN
- U0401-00-IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM "A"
- U0402-00-IMPLAUSIBLE DATA RECEIVED FROM TCM
- U0403-00-IMPLAUSIBLE DATA RECEIVED FROM T-CASE
- U0415-00-INVALID DATA RECEIVED FROM ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE "A"
- U0422-00-IMPLAUSIBLE DATA RECEIVED FROM BODY CONTROL MODULE
- U0423-00-IMPLAUSIBLE DATA RECEIVED FROM CLUSTER/CCN
- U0429-00-IMPLAUSIBLE DATA RECEIVED FROM STEERING COLUMN CONTROL MODULE
- U110A-00-LOST COMMUNICATION WITH SCM - CAN-C
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