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.
DTC P0106: Map/TP Sensor Performance/Range (CNG): Description
Powertrain Control Module (PCM) supplies 5 volts on Throttle Position (TP) and Manifold Absolute Pressure (MAP) sensor reference voltage circuits. PCM also supplies a ground circuit to TP and MAP sensors. When throttle is depressed, TP signal voltage rises to approximately 5 volts. As throttle is released, TP signal voltage drops to around 0.6 volt. PCM and the Alternate Fuel Engine Control Unit (AF ECU) monitor TP signal circuit voltage and determine angle (or opening) of throttle plate.
When manifold vacuum is low, MAP signal voltage to approximately 4.5 volts. As manifold vacuum increases, MAP signal voltage drops to around one volt. PCM and AF ECU monitor MAP signal circuit voltage and determine vacuum within intake manifold.
Certain vehicle models will also use MAP sensor to determine barometric pressure when ignition switch is turned ON and engine is not running. This BARO reading may also be updated whenever engine is operated at wide open throttle.
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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.