Code
P1100
DAEWOO
P — Powertrain
MAP SNSR MAL
AI status
Completed
Completed
100%
Causes
- Damaged or disconnected MAP sensor
- Faulty MAP sensor
- Open or short in MAP sensor wiring or connector
- Leaking, collapsed, or disconnected MAP vacuum/boost hose
- Poor sensor ground or lost reference voltage (typically 5 V)
- Contaminated sensor (oil, dirt) or mechanical damage
Symptoms
- Check Engine Light (MIL) illuminated
- Poor idle quality or rough running
- Stalling at idle or after start
- Reduced engine power, hesitation or surging under load
- Hard starting or increased fuel consumption
- Black smoke or rich/lean fueling symptoms
What to check
- Visual inspection of MAP sensor, connector and vacuum hose for damage or disconnection
- Check for stored freeze-frame and live MAP data with scan tool
- Verify power (5 V reference) and ground at the sensor connector with key ON
- Measure MAP sensor signal voltage with engine off and at various engine loads
- Backprobe wiring for continuity and shorts to ground/12 V
- Compare MAP voltage/pressure reading to atmospheric pressure (key ON, engine OFF) and to RPM/load changes
Signal parameters
- Reference supply: typically 5.0 V (check vehicle spec) between reference pin and ground
- Sensor ground: near 0 V continuity to chassis ground
- Signal output: approximately 0.5 V to 4.5 V (varies with manifold pressure; lower voltage = higher vacuum, higher voltage = higher pressure)
- Typical ranges: ~10–110 kPa (or 29–101 kPa depending on sensor/engine) mapped to the above voltage range — consult OEM specs
- Key ON, engine OFF: signal should approximate atmospheric pressure voltage (near high end of range)
- Response: voltage should change smoothly with throttle or vacuum changes; no intermittent drops to 0 V or constant rail voltage
Diagnostic algorithm
- Retrieve freeze-frame and live MAP data with a scan tool. Note conditions when DTC set (load, RPM, temp).
- Perform visual check: inspect sensor, connector, wiring harness, and vacuum/boost hose for obvious damage, corrosion or disconnection.
- With ignition ON (engine OFF), verify 5 V reference at sensor reference pin and good chassis/ECM ground at sensor ground pin.
- Backprobe the MAP signal pin: record voltage with key ON/engine OFF (should reflect atmospheric pressure). Start engine and observe signal change smoothly with RPM/throttle.
- Wiggle wiring and connector while observing live signal and DTC status to reveal intermittent faults.
- Check continuity of signal and ground circuits to the ECM; check for shorts to battery positive or ground.
- Inspect/replace vacuum hose to sensor. Ensure hose is not collapsed and check for intake manifold leaks that could affect readings.
- If wiring and supply/ground are good but signal is out of range or erratic, replace the MAP sensor and retest.
- Clear codes and road test to confirm the code does not return. If it returns after sensor replacement, consider ECM input circuit diagnosis or ECM repair/reprogramming per manufacturer guidance.
Likely causes
- Broken or corroded connector pins at MAP sensor
- Vacuum hose detached from sensor or intake manifold
- Wiring chafed, pinched, or shorted to ground/12 V
- MAP sensor internal failure (electrical or diaphragm)
- Blown sensor supply fuse or open ignition-switched 5 V reference
- Water ingress or oil contamination in sensor
Fault status
Status
P1100 — MAP sensor malfunction detected. Check MAP sensor, wiring, vacuum hose, power and ground before replacing components.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Repair manuals
Manual library for DAEWOO
75
Browse 75 DAEWOO manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
DAEWOO
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DAEWOO: 2001
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DAEWOO: 2000
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DAEWOO: 1999
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Lanos
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- S, 4D Sedan, Automatic
- S, 4D Sedan, Standard
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- SE, 2D Hatchback, Standard
- SE, 4D Sedan, Automatic
- SE, 4D Sedan, Standard
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- SX, 2D Hatchback, Standard
- SX, 4D Sedan, Automatic
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Leganza
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Nubira
- CDX, 4D Hatchback, Automatic
- CDX, 4D Hatchback, Standard
- CDX, 4D Sedan, Automatic
- CDX, 4D Sedan, Standard
- CDX, 4D Wagon, Automatic
- CDX, 4D Wagon, Standard
- SX, 4D Hatchback, Automatic
- SX, 4D Hatchback, Standard
- SX, 4D Sedan, Automatic
- SX, 4D Sedan, Standard
- SX, 4D Wagon, Automatic
- SX, 4D Wagon, Standard
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