U3021 Dodge Intrepid OBD Code

OBD/2 U3021 error code description and symptoms.

Mass Air Flow (MAF) Sensor Intermittent The MAF sensor circuit is monitored by the PCM for sudden voltage (or air flow) input change through the comprehensive component monitor (CCM). If during the last 40 warm-up cycles in key ON engine running the PCM detects a voltage (or air flow) change beyond the minimum or maximum calibrated limit, a continuous memory diagnostic trouble code (DTC) is stored.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

U3021 Dodge Intrepid Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine U3021 light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If crankshaft position sensor a circuit range/performance so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the crankshaft position sensor a circuit range/performance.

Common Causes of Dodge Intrepid U3021 OBD2 Code

A common cause of code U3021 is the failure of Crankshaft Position Sensor A Circuit Range/Performance, but there are several other possible causes as well, such as ;

Damaged camshaft position (CMP) sensor
Failures of clutch motion/travel sensors.
Faulty ignition coil (s)
Insufficient cylinders compression

U3021 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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U3021 Dodge Intrepid OBD Code

U3021 Dodge Intrepid Error Code Repair Process :

Common Causes of Dodge Intrepid U3021 OBD2 Code

U3021 code for other Dodge cars