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C1091 Engine Trouble Code

Meaning of C1091 engine trouble code is : C1091 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.

C1091 Possible Solution:

C1091 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.

C1091 Code Meaning :

C 1 0 9 1
OBD-II Diagnostic Chassis (C) Trouble Code For Engine Fuel And Air Metering Ambient Air Temperature Sensor Circuit Low Crankshaft Position Sensor A Circuit Malfunction Crankshaft Position Sensor A Circuit Low Input

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.

C1091 OBD-II Diagnostic Chassis (C) Trouble Code Description

C1091 engine trouble code is about Crankshaft Position Sensor A Circuit Low Input.

Reason For C1091 Code

The reason of C1091 OBD-II Engine Trouble Code is Ambient Air Temperature Sensor Circuit Low.

C1091 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.