P1702 Diagnostic Trouble Code

P1702 is a kind of OBD-II Diagnostic P-Powertrain 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 P1702 diagnostic trouble code may include:

Faulty or damaged wiring
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
Poor fuel economy
Reduction in engine performance, especially at low RPM levels

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.
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

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. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors.

Process Tips

Diagnostic trouble code P1702 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 P1702.

Fortunately, P1702 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1702 Trouble Code For Specific Cars

P1702 Darracq Type A Heated Wind Shield Relay Short to Vbatt (changed from Failure 2/6/97)
P1702 Proton Waja Fuel Temperature Sensor #1 Circuit Failure
P1702 Citroen Traction Fuel Pump Speed Control Circuit Malfunction
P1702 Seat Toledo Input/Turbine Speed Sensor Circuit No Signal
P1702 Toyota Model F Output Circuit Check Signal Low
P1702 Volkswagen Gli Ride Control LR Shock Actuator Circuit Failure
P1702 Maybach Ds8 Transmission System MIL Fault