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P3742 Engine Trouble Code

Meaning of P3742 engine trouble code is a kind of powertrain trouble code and P3742 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.

P3742 Fault Symptoms :

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

If one of these reasons for P3742 code is occuring now you should check P3742 repair processes.
Now don't ask yourself; What should you do with P3742 code ?
The solution is here :

P3742 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.

P3742 Code Meaning :

P	3	7	4	2
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine	Ignition System Or Misfire	Fuel Rail Pressure Sensor Circuit Malfunction	Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)	Glow Plug/Heater Circuit 'A' Malfunction

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.

P3742 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P3742 engine trouble code is about Glow Plug/Heater Circuit 'A' Malfunction.

Main reason For P3742 Code

The reason of P3742 OBD-II Engine Trouble Code is Fuel Rail Pressure Sensor Circuit Malfunction.

P3742 DTCs may also be triggered by faults earlier down the line. For example, a dirty MAF sensor might be causing the car to overcompensate in its fuel-trim adjustments. As a result, oxygen sensors are likely to report fuel mixture problems.

	Example: 0140