Code Definition

P1102 — Manifold Absolute Pressure sensor EGR Mode 3

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Hyundai

About P1102

P1102 is a manufacturer-specific powertrain diagnostic trouble code recorded for Hyundai vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1102 is stored, the module has detected a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1102 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

In Hyundai vehicles, the P1102 code relates to the Manifold Absolute Pressure (MAP) sensor as monitored during EGR Mode 3, a self test phase in which the Engine Control Module (ECM) commands the EGR valve and watches for the expected change in manifold pressure. The MAP sensor measures intake manifold pressure and is a primary input the ECM uses for fuel delivery, spark timing, and EGR flow control. This code sets when the MAP signal does not respond as expected during the EGR test, meaning the manifold pressure change does not match what the ECM commanded. Drivers may notice rough idle, hesit...

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