2003 Mazda B4000 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 Mazda B4000
Verified by mechanics, reported by drivers like you
Ask a mechanic in our community
Never overpay. Check prices with our estimator
2003 Mazda B4000 ProblemsRuns Poorly, Possible Check Engine Light
A dirty, or contaminated mass airflow sensor (MAF) can cause the engine to run poorly. The Check Engine Light may or may not illuminate. MAF sensor related fault codes P0102 and/or P0103 may be stored. In some cases, carefully cleaning the sensor element will fix the problem. If not, replacement of the sensor may be required.
The engine may fail to start due to an electrically shorted sensor. Some of the sensors may internally short and not blow any fuses. A technician may find no spark and no operation of the fuel injectors in the diagnosis. One way a technician may isolate the defective sensor is by disconnecting sensors one by one to see if the engine starts.
Water intrusion into a connector (X309) located under the cab, beneath the driver's seat, can cause a rough idle, erratic speedometer operation, ABS Light and Check Engine Light illumination, and automatic transmission shifting problems. If needed, connector repair parts are available from Mazda dealers, and possibly some Ford dealers.
2003 Mazda B4000 QuestionsI need to know what size belt to by pass ac compressor. (1 answer)
My a/c bearing is bad. I want to by pass the a/c compressor pully. I will replace the a/c in a few months. The truck is a manual and it is stalling and making a loud noice.