B1688 Trouble Code

View B1688 obd/2 error code description and symptoms. B1688 engine photo

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) B1688 DTC is a check of the VCT unit.

Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code B1688, so consult the manual to locate the brake fluid reservoir. Bear in mind that a low fluid level can set code B1688 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.

B1688 Error Code Repair Process :

If your vehicle failed a B1688 test and the B1688 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 b1688 lamp dome input circuit short to ground 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 b1688 lamp dome input circuit short to ground: 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.

B1688 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.

Common Causes of B1688

A common cause of code B1688 is the failure of B1688 Lamp Dome Input Circuit Short To Ground, but there are several other possible causes as well, such as ;

Camshaft advance mechanism binding (VCT unit)
Faulty ignition coil (s)
Faulty Intake Valve Timing Control Solenoid Valve
Faulty Air fuel ratio (A/F) Sensor 1 Bank 1

B1688 code for all cars

You can view according B1688 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+B1688 Subaru Outback

+B1688 Adler 14

+B1688 Vauxhall Vectra B

+B1688 Mercedes-benz 240

+B1688 Chrysler 300m

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

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