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U1866 Engine Trouble Code

Meaning of U1866 engine trouble code is a kind of network trouble code and U1866 code can be about replacing a broken oxygen sensor can eventually lead to a busted catalytic convertor which can cost upwards of $2,200. Taking your car into a shop will cost you around $210 depending on the car. However, an oxygen sensor is easy to replace on many cars and is usually detailed in the owner's manual. If you know where the sensor is, you only have to unclip the old sensor and replace it with a new one. Regardless of how you approach it, you should get this fixed right away.

U1866 Fault Symptoms :

Check engine light comes on
Engine stalling or misfiring
Engine performance issues
Car not starting

If one of these reasons for U1866 code is occuring now you should check U1866 repair processes.
Now don't ask yourself; What should you do with U1866 code ?
The solution is here :

U1866 Possible Solution:

Power Steering Pressure (PSP) Switch Malfunction In Key On, Engine Off Self-Test, this DTC indicates the PSP input to the PCM is high. In Key On, Engine Running Self-Test, this DTC indicates that the PSP input did not change state. Steering wheel must be turned during Key On, Engine Running Self-Test PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged.

U1866 Code Meaning :

U	1	8	6	6
OBD-II Diagnostic Network (U) Trouble Code For Engine	Fuel And Air Metering	Engine Oil Temperature Sensor Malfunction	Cylinder 4 Contribution/Balance Fault	Ignition Coil A Primary/Secondary Circuit Malfunction

Regarding the U1866 code, it would probably be worthwhile to carefully inspect the wire harness near the intake manifold bracket. This is done most easily from below the car in the area near the oil filter.

U1866 OBD-II Diagnostic Network (U) Trouble Code Description

U1866 engine trouble code is about Ignition Coil A Primary/Secondary Circuit Malfunction.

Main reason For U1866 Code

The reason of U1866 OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.

U1866 DTC specifically refers to the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set.

	Example: 0140