P1106
Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage
What it means
P1106. Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage. This Chevy-enhanced code applies to Silverado, Sierra, Tahoe, Yukon, Suburban.
Findings, check these first
- Failing MAP sensor with intermittent internal open
- Chafed MAP signal wire shorting to 5V reference
- Loose or corroded MAP sensor connector
- Vacuum leak at MAP sensor port or intake grommet
- Aftermarket tune altering MAP rationality limits
Standard procedure
- Scan with a Tech2 or GDS2 and capture freeze frame MAP voltage
- Wiggle-test the MAP harness while watching live MAP data
- Backprobe the MAP signal wire and compare voltage to a known-good spec
- Inspect the MAP vacuum port and grommet for cracks or leaks
- Replace the MAP sensor only if voltage spikes high with wiring intact, then clear and road test
Look up another code
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Sources and review
Review: checked against the recorded source material.
- OBDII Code P1106 CHEVROLET - Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage | Engine-Codes.com
archived reference page (engine-codes.com via Wayback Machine)
Supports: code identity and Chevrolet application
Fetched directly. Exact title match. Model and year fitment remain curator claims.
Last updated 2026-09-13.
Report a correction for P1106. Include your vehicle, the issue and a source if you have one.