What does P1107 mean on a Chevy?

P1107. Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage. Applies to Silverado, Sierra, Tahoe, Yukon, Suburban.

What causes P1107 on a Chevy?

Failing MAP sensor dropping signal intermittently MAP signal wire chafed and shorting to ground Corroded MAP connector terminals Blocked or oil-fouled MAP vacuum port Weak 5V reference from the PCM under load

How do I fix P1107 on a Chevy?

Scan with a Tech2 or GDS2 and review freeze frame MAP readings Wiggle-test the MAP harness while monitoring live MAP voltage Check the 5V reference and ground at the MAP connector Clean and inspect the MAP vacuum port and sealing grommet Replace the MAP sensor only after wiring tests pass, then clear and road test

Code

P1107

Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: Silverado, Sierra, Tahoe, Yukon, Suburban
Related: No single generic twin. See OBD Codes List

What it means

P1107. Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage. This Chevy-enhanced code applies to Silverado, Sierra, Tahoe, Yukon, Suburban.

Findings, check these first

Failing MAP sensor dropping signal intermittently
MAP signal wire chafed and shorting to ground
Corroded MAP connector terminals
Blocked or oil-fouled MAP vacuum port
Weak 5V reference from the PCM under load

Standard procedure

Scan with a Tech2 or GDS2 and review freeze frame MAP readings
Wiggle-test the MAP harness while monitoring live MAP voltage
Check the 5V reference and ground at the MAP connector
Clean and inspect the MAP vacuum port and sealing grommet
Replace the MAP sensor only after wiring tests pass, then clear and road test

Look up another code

Press / to jump to the box. Chevy-enhanced powertrain, body, chassis and network codes.

Sources and review

Review: no source links are recorded for this entry.

Last updated 2026-09-13.

Report a correction for P1107. Include your vehicle, the issue and a source if you have one.