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.
Engine Controls - Sensor Operating Range Charts: Introduction
Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a trouble code, but it may cause driveability problems.
| Terminal (1) | Ignition On Volts | Engine Running Volts | ||
|---|---|---|---|---|
| "A" (Power Supply) | 12.0 | 12.0 | ||
| "B" (Airflow Signal | 0.5-1.0 | 1.0-2.0 | ||
| "D" (Ground) | 0 | 0 | ||
| "E" (Ground) | 0 | 0 | ||
|
||||
| Temperature | Ohms |
|---|---|
| -4°F (-20°C) | 14,600-17,800 |
| 68°F (20°C) | 2200-2700 |
| 104°F (40°C) | 1000-1300 |
| 140°F (60°C) | 500-650 |
| 176°F (80°C) | 290-350 |
| Terminals (1) | Ohms With No Vacuum Applied | Ohms @ 5.9 in. Hg | ||
|---|---|---|---|---|
| "A" & "B" | 2700 | 2700 | ||
| "A" & "C" | 500 | 2700 | ||
| "B" & "C" | 2400 | 100 | ||
|
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| Temperature | (1) Ohms | ||
|---|---|---|---|
| 32°F (0°C) | 5000-6000 | ||
| 68°F (20°C) | 2100-2700 | ||
| 104°F (40°C) | 1000-1500 | ||
| 176°F (80°C) | 300-380 | ||
|
|||
| Operating Condition | Volts |
|---|---|
| Rapidly Accelerating | 0.5-1.0 |
| Deceleration | 0.0-0.4 |
| Condition (1) | Continuity Between Terminals "A" & "B" | |||
|---|---|---|---|---|
| MX-3 | ||||
| .012" (.30 mm) | Yes | |||
| .016" (.40 mm) | No | |||
|
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| Wire Color To Ground | Closed Throttle Volts | WOT Volts | ||
|---|---|---|---|---|
| Blue/White (2M) (1) (MX-3) | 0.1-1.0 | 2.8-4.5 | ||
|
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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.
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