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C1721 Engine Trouble Code

C1721 Engine

When you check engine light came on code C1721 the reason should be . However your vehicle's manufacturer may have a different definition for the C1721 OBD-II Diagnostic Chassis (C) Trouble Code. So you should chech it on our car models.

Theoretically you can drive for a few weeks or even months with a broken MAF sensor. You will notice a decrease in gas mileage and over time the car will eventually start stalling a lot. At a shop, the replacement cost is between $200-$300 depending on the car, but that's usually the cost of parts because the labor is relatively simple.

C1721 Code Meaning :

C 1 7 2 1
OBD-II Diagnostic Chassis (C) Trouble Code For Engine Fuel And Air Metering Throttle/Pedal Position Sensor/Switch A Circuit Intermittent Crankshaft Position Sensor A Circuit Malfunction 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.

C1721 OBD-II Diagnostic Chassis (C) Trouble Code Description

C1721 engine trouble code is about Glow Plug/Heater Circuit 'A' Malfunction.

Reason For C1721 Code

The reason of C1721 OBD-II Engine Trouble Code is Throttle/Pedal Position Sensor/Switch A Circuit Intermittent.

C1721 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.