B0123 Volkswagen Crossgolf Diagnostic Trouble Code
B0123 Volkswagen Crossgolf code definition:
B0123 is a kind of OBD-II Diagnostic B-Body Diagnostic Trouble Code for Volkswagen Crossgolf.
B0123 Volkswagen Crossgolf is defined as Cylinder 3 Injector Circuit Malfunction. This code means the PCM (powertrain control module, also known as ECM or engine control) has detected a problem in the injector or its wiring, or in injector circuit for cylinder 3. Other symptoms that may indicate this problem are when the Check Engine Light illuminates and when there is a visible lack of engine power.
Symptoms
Symptoms of a B0123 Volkswagen Crossgolf diagnostic trouble code may include:
- Excessive exhaust leak
- Hesitation upon acceleration
- Malfunction Indicator Lamp (MIL) illuminated
- The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
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Possible Causes :
- Defective ECU strategies or components will prevent proper regeneration
- The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
- Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
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Common Misdiagnoses
- Crankshaft Position Sensor Circuit Performance Problem
- TP Sensor Learn Not Complete Problem
- Low Coolant Circuit Problem
- Cruise Control System - Vehicle Accel Too High Problem
- Kick-Down Switch Failed Short Problem
Repair Processes :
With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground.
If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve.
Look at the plug wires to make sure they are not burnt or laying on the exhaust.
Process Tips
Diagnostic trouble code B0123 Volkswagen Crossgolf 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 B0123 Volkswagen Crossgolf.
Fortunately, B0123 Volkswagen Crossgolf is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.
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