A defective vehicle speed sensor can cause problems with the cruise control and speedometer operation, as well as erratic shifting. The connectors on the sensors are also susceptible to corrosion, which will create similar symptoms. Any of these problems can cause Check Engine Light illumination.
Problems for specific Dodge Avenger years:
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Repairpal verified 1999 Dodge Avenger problems
There have been reports of premature head gasket failure; an updated gasket design is available to correct this problem.
Failure to use the correct automatic transmission fluid and follow the maintenance schedule can result in shifting problems.
Spark plug tube seals fail, causing the tubes to fill with engine oil and the engine to misfire. As a result, the engine may run poorly and fuel economy can suffer.
Sensor failure inside the distributor can cause intermittent stalling or a failure to start. In addition, the wires to the distributor are susceptible to internal damage, which can cause the same symptoms.
The automatic transmission can develop problems like erratic shifting, rough shifting, or delayed gear engagement. Repairs for many of these problems are outlined in service bulletins.
2.0L 4 Cylinder
Due to misalignment of the power steering pulley, the power steering belt may be noisy or show irregular wear. Using shims or possibly a new power steering pump bracket in order to correct the alignment issue should fix the problem.