P0107

Code

GWM P — Powertrain

- Low Intake Manifold Absolute Pressure / Intake Manifold Pressure

Brand: GWM

Type: P — Powertrain

Views: UK: 24 EN: 32 RU: 46

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Page language: EN

Causes

Faulty MAP sensor (internal failure)
Short to ground on MAP sensor signal circuit
Open or poor reference/ground for the sensor
Intake system vacuum leak causing abnormally low manifold pressure
Corroded/damaged connector or wiring harness
Faulty engine control module (rare)

Symptoms

Check Engine Light (MIL) illuminated
Rough idle, hesitation or stalling
Poor drivability and reduced engine power
Elevated or erratic fuel trims; possible lean condition
Hard starting or misfires under load

What to check

Read freeze frame and live MAP sensor data with a scan tool; note engine conditions when DTC set
Inspect MAP sensor connector for corrosion, bent pins, contamination, or water
Visually inspect wiring from sensor to ECU for chafing, pinches, or damage
Perform a vacuum/smoke test for intake leaks
Check related stored codes (fuel trim, misfire, fuel delivery) to narrow root cause

Signal parameters

MAP sensor typically uses 3 wires: 5V reference, ground, and signal
Signal voltage should change with engine load: higher pressure (boost) = higher voltage; higher vacuum (idle) = lower voltage
Typical approximate values (manufacturer specific): KOEO (ambient) ~3.5–4.5 V; idle ~1.0–2.5 V — consult vehicle spec
A persistently very low signal voltage (near 0 V) or sudden drop when engine conditions demand otherwise indicates a low input/short to ground

Diagnostic algorithm

Verify the code: record freeze-frame and live MAP data, then clear the code and attempt to re-create conditions to re-set it.
With key ON (engine OFF) observe MAP signal voltage — it should read near ambient pressure voltage per vehicle spec. Then start engine and compare live MAP vs RPM/load.
Back-probe MAP sensor connector: check reference voltage (≈5V), signal voltage, and ground continuity to chassis. Repair any missing reference or poor ground before replacing sensor.
If signal is near 0 V, inspect for a short to ground on the signal wire between sensor and ECU. Wiggle wiring harness while monitoring signal for intermittent faults.
Perform a vacuum test / smoke test on intake manifold and hoses to locate vacuum leaks that could produce unusually low manifold pressure.
If wiring and vacuum system OK, substitute a known-good MAP sensor or bench-test the sensor where possible. Replace sensor if it fails specifications.
After repairs clear codes and perform road test while monitoring MAP, fuel trims, and engine performance to confirm the fault is resolved.
If all checks pass and problem persists, consider ECU input circuits and perform manufacturer-specific ECU diagnostics.

Likely causes

MAP sensor signal wire shorted to chassis ground
MAP sensor failed or intermittent
Blown or weak sensor reference voltage (5V) or poor ground
Large vacuum leak (disconnected hose/manifold gasket) creating excessive vacuum
Corroded pins or water ingress in connector

Fault status

⚠️ Status

ECM detected MAP sensor circuit voltage below expected threshold — low intake manifold absolute pressure input (possible short/low signal or excessive vacuum).

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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P0107 — - Low Intake Manifold Absolute Pressure / Intake Manifold Pressure