P1966 Diagnostic Trouble Code

P1966 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 P1966 diagnostic trouble code may include:

Faulty O2 Sensor
Lack of power
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Hesitation upon acceleration

Possible Causes :

Some aftermarket accessories and performance modifications
A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Fuel with a large percentage of sulfur will clog the DPF quickly

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. Now, clear the codes and test-drive the vehicle to see if the code is reset.

Process Tips

Diagnostic trouble code P1966 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 P1966.

Fortunately, P1966 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1966 Trouble Code For Specific Cars

P1966 Panhard Et Levassor 50 Driver Power Window Motor Circuit Failure
P1966 Rolls-royce Silver Ghost IAT - B Sensor Intermittent
P1966 Amc Matador Air Suspension Gate Solenoid Output Circuit Failure
P1966 Lada 2123 Shift Solenoid A Performance or Stuck Off/1-2 Shift Solenoid Valve Performance
P1966 Volkswagen Gli Ride Control LR Shock Actuator Circuit Failure
P1966 Gmc Terra Park Brake Switch # 2 Applied Circuit Short to Gnd
P1966 Ford Territory Mirror Passenger Vertical Switch Circuit Open