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P2109 Engine Trouble Code

Meaning of P2109 engine trouble code is : P2109 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 $2,000 and you can't do it yourself unless you're an experienced mechanic.

P2109 Possible Solution:

P2109 Engine

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.

P2109 Code Meaning :

P 2 1 0 9
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine Fuel And Air Metering (Injector Circuit Malfunctions Only) Fuel Rail/System Pressure - Too High Cold Start Injector 1 Malfunction Reverse Input Circuit

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.

P2109 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P2109 engine trouble code is about Reverse Input Circuit.

Reason For P2109 Code

The reason of P2109 OBD-II Engine Trouble Code is Fuel Rail/System Pressure - Too High.

Parts or components should not be replaced with reference to only a P2109 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.