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.
Test Dm: Manifold Absolute Pressure Sensor & Thermal Manifold Absolute Pressure Sensor: Testing
| Fault Code | KOEO | KOER | Continuous Memory |
|---|---|---|---|
| P0107 | DM1 | DM1 | DM6 |
| P0108 | DM1 | DM1 | DM6 |
- 1) For KOEO & KOER Only DTC P0107 Or P0108: Check Voltage Between VREF & SIG RTN At MAP/TMAP Sensor
DTC P0107 indicates TMAP sensor reference voltage fell below calibrated limit of .25 volt. DTC P0108 indicates TMAP sensor reference voltage exceeded calibrated limit of 5 volts. Possible causes for these faults are:- VREF Circuit Open, Shorted To Ground Or VPWR
- TMAP Signal Shorted To VPWR
- Faulty TMAP Sensor
- Faulty PCM
Turn ignition switch to OFF position. Disconnect MAP/TMAP sensor connector. Using a DVOM, measure voltage between SIG RTN and VREF circuits at MAP/TMAP harness connector. See Figure-Figure . If voltage measurement is 4-6 volts, go to next step. If voltage measurement is not 4-6 volts, go to TEST C, step 1).
- 2) Check MAP/TMAP Sensor Operation
Connect 2 jumper wires to complete VREF and SIG RTN circuits between MAP/TMAP sensor harness connector and MAP/TMAP sensor connector. Start engine and allow to idle. Using a DVOM, measure voltage on MAP circuit between MAP/TMAP sensor connector and chassis ground. Observe voltage while rapidly increasing engine speed to 3000 RPM by depressing accelerator pedal and then releasing. If voltage rapidly increases to more than 2 volts and then decreases to less than one volt, go to step 4). If voltage does not rapidly increase to more than 2 volts and then decrease to less than one volt, go to next step. - 3) Determine Sensor Replacement
If vehicle equipped with EGR System Module (ESM) type EGR, replace DPFE/MAP sensor. If vehicle is not equipped with ESM type EGR, replace TMAP sensor. - 4) Check MAP/TMAP Circuit For Short To VREF & SIG RTN In Harness
Turn ignition switch to OFF position. Disconnect PCM connector. Using a DVOM, measure resistance between MAP/TMAP circuit and both VREF and SIG RTN circuits at MAP/TMAP sensor harness connector. See Figure-Figure If each resistance is more than 10 k/ohms, go to next step. If either resistance is 10 k/ohms or less, repair short between circuits. - 5) Check MAP/TMAP Sensor Circuit For Open In Harness
Ensure ignition switch is in OFF position and PCM is disconnected. Using a DVOM, measure resistance of MAP circuit between PCM harness connector and MAP/TMAP sensor harness connector. If resistance is less than 5 ohms, replace PCM. If resistance is 5 ohms or more, repair open in TMAP circuit. - 6) Continuous Memory DTC P0107 & P0108: Check For Intermittent Circuits To MAP/TMAP Sensor
Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). Turn ignition switch to ON position. Using scan tool, access MAP V PID from PID/DATA MONITOR & RECORD menu. Observe MAP V PID voltage for indication of fault while shaking and bending MAP/TMAP sensor wiring harness and connector. Tap lightly on MAP/TMAP sensor to simulate road shock. An indication of fault is a sudden change in MAP V PID voltage. If a fault is indicated, isolate and repair as necessary. If no fault is indicated, fault is unable to be duplicated at this time. Go to TEST Z, step 1) .
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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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