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.
Exhaust Pressure (EP) Sensor
The EP sensor is a 3-wire variable capacitance sensor that is supplied a 5.0 volt reference signal by the PCM and returns a linear analog voltage signal that indicates pressure. The sensor voltage input to the PCM increases as the pressure increases.
The EP sensor measures the pressure in the exhaust manifold. The EP sensor signal is used for pressure correlation with the manifold absolute pressure (MAP) sensor and input for exhaust gas recirculation (EGR) valve control.
The EP sensor is located at the left rear of the engine. It is attached to an extension tube from the right hand up pipe going to the turbocharger.
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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.