C0158 Mitsubishi Mum Diagnostic Trouble Code
C0158 Mitsubishi Mum code definition:
C0158 is a kind of OBD-II Diagnostic C-Chassis Diagnostic Trouble Code for Mitsubishi Mum.
C0158 Mitsubishi Mum is described as Fuel Rail Pressure Sensor Circuit Malfunction. This code is strictly about the incoming signal from the FRP (fuel rail pressure) sensor falling below the calibrated limit for a certain period of time. Other serious codes may cause this code to pop up, and they may come with dangerous drivability issues that may expose you to safety risks and cause damage to the engine in the long run.
Symptoms
Symptoms of a C0158 Mitsubishi Mum diagnostic trouble code may include:
- If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
- Corroded or damaged connector
- Reduction in engine performance, especially at low RPM levels
- The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
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Possible Causes :
- Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
- Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
- Fuel with a large percentage of sulfur will clog the DPF quickly
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Common Misdiagnoses
- IC Circuit High Voltage Problem
- Control Module Throttle Actuator Position Performance Problem
- Air Conditioning (A/C) Clutch Feedback Circuit High Voltage Problem
- Cruise Vehicle Speed/Set Speed Difference Too High Problem
- PCM Stack Overrun Problem
Repair Processes :
Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.
It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem.
Process Tips
Diagnostic trouble code C0158 Mitsubishi Mum is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.
Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before C0158 Mitsubishi Mum.
Fortunately, C0158 Mitsubishi Mum is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.
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