Advanced Land Rover diagnostic scanning and fault finding. Dashboard warning lights, air suspension faults, electrical issues.
Land Rover fault diagnosis requires more than a generic OBD2 reader from an auto parts store. Modern Land Rovers — and older ones with electronic management systems — have complex, proprietary controller networks that require specialist equipment and the model knowledge to interpret what the data means. At Davis Performance Landys, we use professional Land Rover diagnostic tools alongside 30 years of hands-on experience to find faults accurately the first time.
A typical Land Rover has between 12 and 30 electronic control modules communicating across CAN bus networks. A fault in one module can generate warning lights from several others. Finding the root cause — rather than simply replacing the module that generated the code — requires understanding the system architecture. A Discovery 3 EAS warning light, for example, may indicate a failed compressor, a leaking air bag, a faulty height sensor, a valve block fault, or a simple wiring issue. We diagnose which, rather than replacing everything until the light goes out.
Fault codes are a starting point, not a diagnosis. A stored code points to a circuit or system; finding out whether the problem is a failed sensor, a damaged wiring loom, a software issue, or an actual mechanical failure requires experience. We test circuits under operating conditions, check voltage and resistance against specifications, and draw on decades of Land Rover-specific fault history to identify patterns that are not obvious from a code scan alone.
We serve customers from South Windsor, Hawkesbury, Penrith, the Hills District, Richmond, and Western Sydney. Located at 18/62 Argyle St, South Windsor — call (02) 9679 1978 or email info@davisperformance.com to book.
Multiple simultaneous warning lights usually indicate either a single underlying fault affecting several systems, or a loss of communication on the CAN bus network. A battery fault, for example, can trigger lights for ABS, traction control, EAS, and engine management simultaneously — because those modules all lost power momentarily. A proper diagnostic scan reads every module separately and identifies which systems have genuine faults versus secondary responses.
Yes. EAS diagnostics are a core part of our work, particularly on Discovery 2, Discovery 3, Discovery 4, and Range Rover models. We diagnose EAS using specialist Land Rover diagnostic tools that can command individual components, read live pressure data, and identify which part of the system — compressor, valve block, air spring, height sensor, or wiring — is at fault. This avoids replacing expensive components unnecessarily.
We use professional Land Rover diagnostic tools, not generic OBD2 readers. Consumer OBD tools only read the engine management module on a standardised protocol. Land Rover diagnostic software communicates with all modules on the vehicle — gearbox, body control, suspension, security, and others — using proprietary protocols. The difference in depth of information is significant.
This entirely depends on the fault. EAS repairs range from a $200–$400 height sensor replacement to a $1,200–$2,000 compressor or valve block replacement. We diagnose before quoting any repair — coming in with a confirmed fault and a specific part requirement is much better value than guessing. Contact us to book a diagnostic appointment.
Yes. The ZF 6HP gearbox fitted to Discovery 3, 4, and Range Rover Sport responds to diagnostic interrogation including live gear selection data, torque converter lockup status, and fault codes specific to ZF systems. Many ZF "faults" are actually caused by old fluid rather than mechanical failure — we assess fluid condition as part of gearbox diagnosis before recommending any mechanical work.
The TD5 EMS (Engine Management System) light has several common causes: MAF (mass airflow meter) failure is the most frequent, particularly at high kilometres. Injector faults, boost pressure sensor faults, and EGR valve issues also trigger the EMS light. Less commonly, the injector wiring harness — which has a known failure mode on early TD5s — causes intermittent EMS faults. We scan and test to determine the specific cause before recommending any replacement.
Yes. The P38 has complex body electrical architecture managed by the BECM (Body Electrical Control Module), which integrates security, central locking, windows, seat memory, and other functions. BECM faults are common and can present in unusual ways. We diagnose and in many cases can repair or reset BECM faults without full module replacement — which requires careful re-initialisation to retain the vehicle's security system functions.
A full vehicle scan with module-by-module fault code reading takes approximately 1–1.5 hours. Active fault-finding — where we need to test circuits, check live data under load, or replicate an intermittent fault — can take longer. We quote for diagnostic time upfront. Any diagnostic time is deducted from the cost of the subsequent repair if you proceed with us.
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