Mitsubishi Grandis 2007 Fault Code Explanation: C1552, C15-53, C1554 and U1073 (ABS & Communication Issues)

Update: The C-series codes I initially saw were retrieved using a Garage Mitsubishi-specific scanner. I later switched to a Bluetooth-connected PC scanner, which detected P0513 and subsequently added V1073. Could you please explain what these specific error codes mean?

C1552: Hall IC output pattern fault — typically indicates a problem with the crankshaft position sensor. C1553: Optical sensor fault — likely points to an issue in wheel speed or transmission sensing components. C1554: Speed sensor out of range — suggests a malfunctioning wheel speed sensor, often linked to ABS system failure. P0513: Incorrect immobilizer key detected — may indicate a faulty key or programming mismatch. Note: V1073 is likely a typo; it should be U1073 (Bus-Off). U1073 indicates a communication failure between vehicle modules, such as the ECU and body control module. As someone who works in fleet maintenance, I don't have access to Mitsubishi-specific technical resources or support for this model.

Thank you for the clarification — yes, it's U1073 (Bus-Off), not V1073. It’s possible that the garage cleared the C-series codes, which may have been temporarily stored. I’ve observed that after clearing the error codes with my scanner, the orange TCL-OFF and Stability Control (ABS) lights remain on during engine start and only turn off when I shut down the engine. The TCL switch has no effect on this behavior. Even after code clearing, the symptoms persist. If there's an underlying issue, will the fault code reappear? And is there a comprehensive list of all possible diagnostic codes for the 2007 Mitsubishi Grandis with 4G69 engine that I can refer to?

Most basic DIY scanners only display P-series (generic) fault codes (e.g., P0001–P0999). They typically do not access C-series or U-series codes, which are specific to Mitsubishi systems and often relate to ABS sensors or module communication. > Clearing the codes will erase stored memory — but if the underlying issue remains, it may reset and reappear later. Importantly, some B- and U-series faults (like U1073) do not trigger the Check Engine Light (CEL), making them harder to detect. > C-series codes are generally associated with ABS sensor issues. > U-series codes indicate communication failures between modules — these can be problematic if a remote starter is installed, as it may interfere with module signaling.