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.
Rough Running Idle, Erratic Speedometer Operation, ABS Light Illuminated, Check Engine Light, and Automatic Transmission Shifting Problems on Mazda B4000
Average mileage: 142,785 (65,721–201,491)
31 people reported this problem
2 people shared problem details
1994 Mazda B4000120,000Visitor
all of the above about to try to fix it
2001 Mazda B4000201,491Visitor
It takes a couple of trys to crank abs light stays on rouph idling some times guits but will crank wright back up check engine light stays on sometimes don't want to shift out of low gear for a little while not fixed yet
94 mazda b-4000 misfires at idle have changed egr - o2 sensor - plugs wires coil pack all have...
A dirty, or contaminated mass airflow sensor (MAF) can cause the engine to run poorly. The Chec...
2000 Mazda B4000 Pickup - replaced all upper and lower oxygen sensorS, replaced the gas cap and...
Makes a clicking sound when ignition key is turned. The "theft" light and "check engine" lights...
problem is getting worse changed sp plugs & wires pvc val