Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA1990626 L4-2184CC 2.2L SOHC F2REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSEGR VALVE POSITION SENSORDESCRIPTION AND OPERATION
1990 Mazda 626 L4-2184cc 2.2L SOHC F2
EGR Valve Position Sensor: Description and Operation
1990 Mazda 626 L4-2184cc 2.2L SOHC F2SECTION Description and Operation
Fig. 124 EGR System:
The EGR Position Sensor is incorporated in the EGR valve assembly. It is a variable resistor that detects EGR control valve lift. The ECU utilizes this information and other inputs to optimize EGR system operation through its control of the EGR solenoid valve.
For complete EGR system description, operation and testing information, refer to EMISSION CONTROLS.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.