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.
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HOMESERVICE MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 40 (ENGINE CONTROLS - TESTS W/CODES - 4.3L)DIAGNOSTIC TROUBLE CODESDTC P0106 - MAP SENSOR SYSTEM PERFORMANCEDIAGNOSTIC PROCEDURES
1998 Chevrolet Suburban K2500, 7.4 J, Part Time
Diagnostic Procedures
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Diagnostic Procedures
WARNING: This page is about a different car, the 1998 GMC Savana, 1998 GMC Forward Control, 1998 Chevrolet Forward Control, 1998 Chevrolet Chevy Van, and 1998 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
- Perform POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK , then go to next step.
- Install scan tool. Turn ignition on, with engine off. Monitor MAP sensor voltage on scan tool. If sensor voltage is 0.4 volt, go to next step. If sensor voltage is not 0.4 volt, go to step 6).
- Disconnect and plug MAP sensor vacuum source. Connect a hand-held vacuum pump to MAP sensor. Start engine. Observe MAP sensor voltage on scan tool. Using vacuum pump, apply 10 in. Hg to MAP sensor. Observe MAP sensor voltage. Subtract this reading from voltage reading noted in step 2). If difference is greater than 1.5 volts, see DIAGNOSTIC AIDS. If difference is not greater than 1.5 volts, go to next step.
- Check MAP sensor connections. If problem is found, go to next step. If connections are okay, go to step 7).
- Repair connections as necessary. After repairs, go to step 7).
- Replace MAP sensor. After replacing sensor, go to next step.
- Using scan tool, select DTC, CLEAR INFO. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, then enter this DTC. Operate vehicle within the conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, repeat step 2).
- Using scan tool, select CAPTURE INFO, REVIEW INFO. If any undiagnosed DTCs are displayed, go to applicable DTC test.
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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.