Code Search

Please fill the "Code Box" to find engine fault code.

Car Models :

Please select your car.

How To Clear Check Engine Lights ?

Ways to clear check engine light on car panel.

Check Engine Light Dictionary

Ways to clear check engine light on car panel.

U1784 Engine Trouble Code

Meaning of U1784 engine trouble code is a kind of network trouble code and U1784 if your catalytic convertor fails completely, you eventually won't be able to keep the car running. Your gas mileage will also be terrible, so you should try and fix it as soon as you can. Unfortunately, the average replacement cost is around $2,140 and you can't do it yourself unless you're an experienced mechanic.

U1784 Fault Symptoms :

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

If one of these reasons for U1784 code is occuring now you should check U1784 repair processes.
Now don't ask yourself; What should you do with U1784 code ?
The solution is here :

U1784 Possible Solution:

Disconnected, dirty or fouled spark plugs are common causes for engines that won't start. Spark plugs typically need to be replaced every season or 25 hours of use. You should also check that the spark plug gap is set properly. If your spark plugs look good, problems with your ignition system can also preventing a spark. These can range from a faulty spark plug lead, shorted kill switch or flywheel key damage.

U1784 Code Meaning :

U	1	7	8	4
OBD-II Diagnostic Network (U) Trouble Code For Engine	Fuel And Air Metering	Fuel Rail Pressure Sensor Circuit Malfunction	Ignition/Distributor Engine Speed Input Circuit Malfunction	Timing Reference High Resolution Signal A Too Many Pulses

The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate.

U1784 OBD-II Diagnostic Network (U) Trouble Code Description

U1784 engine trouble code is about Timing Reference High Resolution Signal A Too Many Pulses.

Main reason For U1784 Code

The reason of U1784 OBD-II Engine Trouble Code is Fuel Rail Pressure Sensor Circuit Malfunction.

U1784 the main thing to check is to verify the operation of the VCT solenoid. You're looking for a sticking or stuck VCt solenoid valve caused by contamination. Refer to vehicle specific repair manual to perform component tests for the VCT unit.

	Example: 0140