CAR OBD CODES

P1666 OBD Code Definition:
Engine Control Module – Engine Shut-off Control
P1666 OBD Code Description:

• Irregular rpm

• Wiring and/or connections to/from the Valve for Pump Jet
• Valve for Pump Jet

• Check wiring and Check / Clean all connections
• Replace the cable-tree to/from all the Valves for Pump Jet
• Replace Valve for Pump Jet (replace them all !)

• The ECU checks the Begin of Injection Period (BIP) by sending a very small amount of current (less than 0.0001 A ) through each injector. Because the current is so small, any extra resistance in the wiring due to damage or corrosion can cause this fault. Before replacing injectors, replace the wiring harness first.