What Does P1655 Mean?
This is a cross-reference code indicating the ECM has detected a fault in the ADR (Active Damping/Ride) control system. The ECM is directing the technician to check the suspension control module's fault memory for specific ADR-related codes.
Common Causes
40%
Fault stored in ADR control module requiring separate diagnosis
25%
Communication fault between ECM and ADR module on data bus
20%
Failed ADR control module or corrupted module software
15%
Power supply or ground issue to ADR module
Diagnostic Steps
1
Step 1: Connect scan tool to ADR/suspension control module and retrieve stored fault codes
2
Step 2: Check for communication with ADR module and verify module responds to commands
3
Step 3: Inspect power supply, ground connections, and fuses for ADR control module
4
Step 4: Test CAN bus communication between ECM and ADR module for signal integrity
5
Step 5: If ADR module is unresponsive, check wiring harness and consider module replacement or reprogramming
Estimated Repair Cost
$100 - $800
Parts + labor, varies by vehicle and location
This is a cross-reference code indicating the ECM has detected a fault in the ADR (Active Damping/Ride) control system. The ECM is directing the technician to check the suspension control module's fault memory for specific ADR-related codes.
The most common cause of P1655 (Please check DTC Memory of ADR Control Module) is: Fault stored in ADR control module requiring separate diagnosis
Typical repair costs for P1655 range from $100 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Adaptive suspension function may be disabled, resulting in firmer or less controlled ride quality. Does not typically affect vehicle safety or drivability.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1655 to identify the root cause.
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Quick Info
Category
Powertrain
System
Suspension Control System
Difficulty
Type
Manufacturer
Recommended Tools
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