C1680 Diagnostic Trouble Code

C1680 is a kind of OBD-II Diagnostic C-Chassis Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a C1680 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
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Some aftermarket accessories and performance modifications

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code C1680 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 C1680.

Fortunately, C1680 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1680 Trouble Code For Specific Cars

C1680 Bristol Britannia Crankshaft Position Sensor B Circuit High Input
C1680 Ferrari Pinin Key Off Voltage High
C1680 Pininfarina Eta Engine Temperature Light Monitor Failure
C1680 Opel Diplomat Dim Panel Decrease Input Circuit Failure
C1680 Chrysler Town And Country Exhaust Pressure Control Valve Range/Performance
C1680 Diana Straight Hydraulic Pump Relay Circuit High
C1680 Honda Stream Reverse Inhibit Control Circuit Malfunction