B2721 Hyundai Starex OBD Code

OBD/2 B2721 error code description and symptoms.

Variable Cam Timing Over-advanced (Bank 1) The comprehensive component monitor (CCM) monitors the VCT position for an over-advanced camshaft timing.
The test fails when the camshaft timing exceeds a maximum calibrated value or remains in an advanced position. Cam timing improperly set No oil flow to the VCT piston chamber Low oil pressure VCT solenoid valve stuck closed Camshaft advance mechanism binding (VCT unit) B2721 DTC is a check of the VCT unit.

As the engine heats up and combustion becomes easier and more complete, the PCM will command the idling control valve to increase the amount of air entering the engine to suit the changing conditions. However, when the load on the engine changes, say, when some electrical consumers or other systems are either turned on or off, the PCM adapts the signal voltage to the idle control valve to ensure that the idling speed remains stable, and at the RPM specified by the manufacturer.

B2721 Hyundai Starex Error Code Repair Process :

If your vehicle failed a B2721 test and the B2721 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses o2 sensor heater circuit malfunction (bank 2 sensor 2) a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look o2 sensor heater circuit malfunction (bank 2 sensor 2): Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression. Use your OBD Express DIY to look at the oxygen sensor outputs, coolant temperature, airflow, calculated engine load, and inlet air temperature.

Common Causes of Hyundai Starex B2721 OBD2 Code

A common cause of code B2721 is the failure of O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2), but there are several other possible causes as well, such as ;

Camshaft advance mechanism binding (VCT unit)
Faulty TCM or TCM programming
Faulty variable valve timing (VVT)
Variable Valve Timing (VVT) circuit is open or shorted

B2721 is a kind of Body Trouble Code

Auto body problems aren't always easy to spot. Diagnosing auto body problems sometimes requires a little know-how. In this section you'll find articles dedicated to teaching you how to diagnose auto body problems.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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B2721 Hyundai Starex OBD Code

B2721 Hyundai Starex Error Code Repair Process :

Common Causes of Hyundai Starex B2721 OBD2 Code

B2721 code for other Hyundai cars