A P0106 – MAP Sensor Range / Performance Fault on the 2017 MG ZS indicates that the Engine Control Module (ECM) has detected a manifold absolute pressure (MAP) sensor signal that is outside the expected operating range or does not correlate with other engine data, such as throttle position, engine speed, and intake conditions. This can affect fuel delivery, ignition timing, and overall engine performance, making accurate diagnosis essential before replacing any components.

Symptoms

• Check Engine Light illuminated
• Diagnostic Trouble Code (DTC) P0106 stored
• Reduced engine performance
• Hesitation during acceleration
• Rough or unstable idle
• Engine may stall at idle
• Poor throttle response
• Increased fuel consumption
• Hard starting in some cases
• Reduced power or limp mode

Possible Causes

The fault may be caused by a defective MAP sensor, contaminated sensor port, intake manifold or vacuum leaks, damaged wiring, poor electrical connections, connector corrosion, low reference voltage, poor ground integrity, restricted intake passages, a faulty throttle body, Engine Control Module (ECM) faults, or software calibration issues affecting sensor monitoring.

Diagnosis

Diagnosis begins by confirming DTC P0106 with a diagnostic scan tool and reviewing freeze-frame and live data. Technicians compare the MAP sensor reading with throttle position, engine speed, and barometric pressure to determine whether the sensor signal is plausible under current operating conditions. A key-on, engine-off comparison is also useful because manifold pressure should closely match atmospheric pressure.

In practice, P0106 is not always caused by a faulty MAP sensor. Vacuum leaks, intake hose damage, contaminated sensor ports, wiring faults, poor connector contact, low system voltage, or an incorrect 5-volt reference can all trigger the same fault. Technicians typically perform a visual inspection of the intake system, verify the sensor’s power supply, ground, and signal circuits, and inspect the connector for corrosion or damage before considering sensor replacement.

If the MAP sensor and its circuits test correctly, further diagnosis should include the throttle body, intake manifold, Engine Control Module, and associated communication circuits. Access to OEM wiring diagrams, connector pinouts, component locations, circuit descriptions, manufacturer testing procedures, and OEM diagnostic workflows is essential for accurate fault isolation. Following the OEM troubleshooting process helps identify the true cause efficiently while avoiding unnecessary replacement of the MAP sensor or other expensive components.

Recommended Resources

OEM Service and Repair Manual

The OEM Service and Repair Manual is the most reliable resource for diagnosing and repairing this fault. It typically includes:

• Diagnostic procedures specific to this fault
• Wiring diagrams and circuit descriptions
• Connector pinout information
• Component locations and removal procedures
• OEM troubleshooting workflows
• Repair specifications and testing procedures

To order the correct OEM Service and Repair Manual for your 2017 MG ZS, submit your request using the form below and our team will provide the ordering details.