C1703 Diagnostic Trouble Code

C1703 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 C1703 diagnostic trouble code may include:

Fuel pressure too high
Diminished fuel efficiency
Rich or lean exhaust
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

Possible Causes :

A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Faulty IMRC actuator/sensor
Faulty IMRC actuator relay (if equipped)

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code C1703 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 C1703.

Fortunately, C1703 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1703 Trouble Code For Specific Cars

C1703 Mercedes S Class Air Bag Crash Sensor #1 Ground Circuit Failure
C1703 Bmw X4 Column Reach Feedback Potentiometer Circuit Open
C1703 Jensen Sv8 Seat Front Up/Down Potentiometer Feedback Circuit Failure
C1703 Mitsubishi Rvr Aux Heater Flame Sensor Circuit Short to Ground
C1703 Turner 1220 Pedal Position Sensor A Circuit Intermittent
C1703 Saab 9-5 Ignition Switch Illegal Input Code
C1703 Innocenti 990 SCP (J1850) Invalid or Missing Data for Function Read Vehicle Speed