Code Definition

P1106 — MAP Circuit Intermittent Voltage High

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

About P1106

P1106 is a manufacturer-specific powertrain diagnostic trouble code recorded for Isuzu vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1106 is stored, the module has detected a signal or supply voltage higher than the expected operating range.

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.

P1106 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

This Isuzu code indicates the Manifold Absolute Pressure (MAP) sensor is intermittently reporting a voltage higher than the expected range. The MAP sensor measures intake manifold pressure and outputs a voltage that rises as pressure increases toward atmospheric, and the Engine Control Module (ECM) uses this signal to calculate engine load, fuelling, and spark timing. This code sets when the ECM detects sporadic high voltage spikes from the sensor, which often indicate a brief short to power or reference, a loss of ground, or an internally faulty sensor. The intermittent nature can produce hes...

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