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Symptom: P0235-TURBOCHARGER BOOST SENSOR SUPPLY LOW EX- CEEDED When Monitored and Set Condition: P0235-TURBOCHARGER BOOST SENSOR SUPPLY LOW EXCEEDED When Monitored: With the ignition on. Set Condition: The turbocharger boost pressure sensor supply voltage stays below 4.75 volts for at least 2 seconds. POSSIBLE CAUSES INTERMITTENT CONDITION TURBOCHARGER BOOST PRESSURE/INTAKE AIR TEMPERATURE SENSOR 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND 5-VOLT SUPPLY AND SENSOR GROUND CIRCUITS SHORTED TOGETHER ENGINE CONTROL MODULE TEST ACTION APPLICABILITY 1 Turn the ignition on. All Yes → No → 2 Turn the ignition off. All Yes → Replace the Turbocharger Boost Pressure/Intake Air Tempera- No → 3 Turn the ignition off. All Yes → No → Repair the 5-volt Supply circuit for a short to ground. 72 DRIVEABILITY - DIESEL |