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Home >> Land Rover >> 1990 >> Range Rover County >> Repair and Diagnosis >> Suspension >> Electronic Suspension >> Electronic Air Suspension - 3.9L & 4.2L >> Self-Diagnostic System >> Diagnostic Trouble Code Definitions

Diagnostic Trouble Code Definitions

NOTE: It is essential that the system be disabled using the disable switch when any service under the vehicle is required or the vehicle is to be lifted.
DIAGNOSTIC TROUBLE CODE DEFINITIONS

Scan Tool Display Perform Test
Right Front Sensor Above Limit A 
Right Front Sensor Below Limit A 
Left Front Sensor Above Limit D 
Left Front Sensor Below Limit D 
Right Rear Sensor Above Limit G 
Right Rear Sensor Below Limit G 
Left Rear Sensor Above Limit J 
Left Rear Sensor Below Limit J 
Engine Speed Fault Detected M 
Vehicle Speed Fault Detected N 
Pressure Switch Stuck On O 
Left Front Valve Stuck Closed P 
Cannot Lower Left Front Air Spring P 
Left Front Valve Stuck Open (1)
Right Front Valve Stuck Closed Q 
Cannot Lower Right Front Air Spring Q 
Right Front Valve Stuck Open (1)
Left Rear Valve Stuck Closed R 
Cannot Lower Left Rear Air Spring R 
Left Rear Valve Stuck Open (1)
Right Rear Valve Stuck Closed S 
Cannot Lower Right Rear Air Spring S 
Right Rear Valve Stuck Open (1)
Air Compressor Failure Indicated T 
Air Supply Leak Indicated T 
Exhaust Valve Stuck Open T 
Inlet Valve Stuck Closed T 
Exhaust Valve Stuck Closed W 
(1) Check air lines-to-air spring for leaks. See LEAK TEST PROCEDURE  under ON-VEHICLE SERVICE. If no air leak is found, replace the Air Valve Block.
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