Code
P0105
Generic
P — Powertrain
Manifold Absolute Pressure/Barometric Pressure Sensor Circuit
Views:
UK: 39
EN: 109
RU: 83
AI status
Completed
Completed
100%
Causes
- Open or short in MAP/BARO sensor signal, reference (5V) or ground circuit
- Corroded or loose connector at the sensor
- Failed MAP/BARO sensor (internal electrical fault)
- Blocked or restricted MAP sensor port or vacuum line
- Intake air leaks between sensor port and intake manifold
- Incorrect reference voltage from PCM or poor PCM ground
Symptoms
- Check Engine Light (MIL) illuminated
- Rough idle, stalling or hard starting
- Poor engine performance, hesitation or reduced power
- Increased fuel consumption or black smoke (rich condition)
- Surging or unstable idle
- Driveability problems that may vary with load/altitude
What to check
- Read freeze frame and live data with a scan tool; note MAP and BARO values and engine conditions when the code set
- With ignition ON (engine off) compare BARO reading to local atmospheric pressure (should be close: ~100–105 kPa / 29–31 inHg at sea level)
- With engine running, compare MAP sensor value to expected manifold pressure for idle and under load
- Inspect sensor connector and wiring for corrosion, bent pins, damage or loose fit; wiggle harness while monitoring live data
- Measure sensor reference voltage (usually ~5 V) and ground at the connector
- Measure MAP sensor signal voltage while varying engine vacuum (vacuum pump) and compare to expected change
Signal parameters
- Sensor reference voltage: typically ~5 V (check vehicle spec)
- Signal voltage range (typical): ~0.5–4.5 V depending on pressure and sensor design
- BARO reading (ignition ON, engine OFF): ~100–105 kPa (29–31 inHg) at sea level — should match local atmospheric pressure
- MAP reading (engine idle): commonly ~20–40 kPa (5–12 inHg) depending on engine vacuum and altitude; under boost or wide open throttle a MAP sensor will approach atmospheric/above atmospheric pressure
- Continuity/ground resistance: sensor ground should be low resistance to chassis/PCM ground (typically
Diagnostic algorithm
- Verify the code and note freeze-frame data. Clear codes and see if P0105 returns.
- With a scan tool, monitor MAP and BARO PID values at key ON/engine OFF and during idle and load. On key ON (engine off) BARO should match ambient pressure.
- Visually inspect the sensor, connector and wiring harness for damage, corrosion, or loose pins. Repair any obvious issues.
- Backprobe connector: verify reference voltage (~5 V) between reference pin and ground, and verify a good ground at the sensor.
- Measure MAP signal voltage while applying known vacuum or changing engine load; signal should change smoothly with pressure. Use a handheld vacuum pump if available.
- Check for blocked sensor port or vacuum hose; clear or replace if clogged. Perform a smoke test or use approved method to find intake leaks if readings are inconsistent with engine load.
- If wiring and supply voltages are good but signal is stuck/open/shorted, replace the MAP/BARO sensor and retest.
- If a new sensor does not clear the issue, inspect PCM ground connections and wiring back to the PCM. As a last step, consider PCM diagnostics or software updates per factory procedure.
- After repairs, clear codes and road-test to confirm normal operation and that the code does not return.
Likely causes
- Damaged wiring or poor connector at MAP sensor
- Faulty MAP/BARO sensor
- Bad sensor reference (5V) or ground
- Blocked sensor port or vacuum hose leak
Fault status
Status
P0105 — MAP/BARO sensor circuit fault. The PCM detected an open/short or abnormal signal in the MAP/Barometric pressure sensor circuit. Inspect sensor, wiring, connectors, 5V reference and ground; verify MAP and BARO readings and repair as required. Do not assume sensor replacement before checking supply and grounds.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P0105
GWM
P — Powertrain
- Intake Manifold Absolute Pressure Sensor Circuit / Intake Manifold Barometric Pressure
Views:
UK: 11
EN: 39
RU: 44
AI status
Completed
Completed
100%
Causes
- Open or short in MAP/BARO sensor signal, reference (5V) or ground circuit
- Corroded or loose connector at the sensor
- Failed MAP/BARO sensor (internal electrical fault)
- Blocked or restricted MAP sensor port or vacuum line
- Intake air leaks between sensor port and intake manifold
- Incorrect reference voltage from PCM or poor PCM ground
Symptoms
- Check Engine Light (MIL) illuminated
- Rough idle, stalling or hard starting
- Poor engine performance, hesitation or reduced power
- Increased fuel consumption or black smoke (rich condition)
- Surging or unstable idle
- Driveability problems that may vary with load/altitude
What to check
- Read freeze frame and live data with a scan tool; note MAP and BARO values and engine conditions when the code set
- With ignition ON (engine off) compare BARO reading to local atmospheric pressure (should be close: ~100–105 kPa / 29–31 inHg at sea level)
- With engine running, compare MAP sensor value to expected manifold pressure for idle and under load
- Inspect sensor connector and wiring for corrosion, bent pins, damage or loose fit; wiggle harness while monitoring live data
- Measure sensor reference voltage (usually ~5 V) and ground at the connector
- Measure MAP sensor signal voltage while varying engine vacuum (vacuum pump) and compare to expected change
Signal parameters
- Sensor reference voltage: typically ~5 V (check vehicle spec)
- Signal voltage range (typical): ~0.5–4.5 V depending on pressure and sensor design
- BARO reading (ignition ON, engine OFF): ~100–105 kPa (29–31 inHg) at sea level — should match local atmospheric pressure
- MAP reading (engine idle): commonly ~20–40 kPa (5–12 inHg) depending on engine vacuum and altitude; under boost or wide open throttle a MAP sensor will approach atmospheric/above atmospheric pressure
- Continuity/ground resistance: sensor ground should be low resistance to chassis/PCM ground (typically
Diagnostic algorithm
- Verify the code and note freeze-frame data. Clear codes and see if P0105 returns.
- With a scan tool, monitor MAP and BARO PID values at key ON/engine OFF and during idle and load. On key ON (engine off) BARO should match ambient pressure.
- Visually inspect the sensor, connector and wiring harness for damage, corrosion, or loose pins. Repair any obvious issues.
- Backprobe connector: verify reference voltage (~5 V) between reference pin and ground, and verify a good ground at the sensor.
- Measure MAP signal voltage while applying known vacuum or changing engine load; signal should change smoothly with pressure. Use a handheld vacuum pump if available.
- Check for blocked sensor port or vacuum hose; clear or replace if clogged. Perform a smoke test or use approved method to find intake leaks if readings are inconsistent with engine load.
- If wiring and supply voltages are good but signal is stuck/open/shorted, replace the MAP/BARO sensor and retest.
- If a new sensor does not clear the issue, inspect PCM ground connections and wiring back to the PCM. As a last step, consider PCM diagnostics or software updates per factory procedure.
- After repairs, clear codes and road-test to confirm normal operation and that the code does not return.
Likely causes
- Damaged wiring or poor connector at MAP sensor
- Faulty MAP/BARO sensor
- Bad sensor reference (5V) or ground
- Blocked sensor port or vacuum hose leak
Fault status
Status
P0105 — MAP/BARO sensor circuit fault. The PCM detected an open/short or abnormal signal in the MAP/Barometric pressure sensor circuit. Inspect sensor, wiring, connectors, 5V reference and ground; verify MAP and BARO readings and repair as required. Do not assume sensor replacement before checking supply and grounds.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P0105
LAND ROVER
P — Powertrain
Failure in the absolute pressure / barometric pressure circuit Distributor
Views:
UK: 17
EN: 59
RU: 56
AI status
Completed
Completed
100%
Causes
- Open or short in MAP/BARO sensor signal, reference (5V) or ground circuit
- Corroded or loose connector at the sensor
- Failed MAP/BARO sensor (internal electrical fault)
- Blocked or restricted MAP sensor port or vacuum line
- Intake air leaks between sensor port and intake manifold
- Incorrect reference voltage from PCM or poor PCM ground
Symptoms
- Check Engine Light (MIL) illuminated
- Rough idle, stalling or hard starting
- Poor engine performance, hesitation or reduced power
- Increased fuel consumption or black smoke (rich condition)
- Surging or unstable idle
- Driveability problems that may vary with load/altitude
What to check
- Read freeze frame and live data with a scan tool; note MAP and BARO values and engine conditions when the code set
- With ignition ON (engine off) compare BARO reading to local atmospheric pressure (should be close: ~100–105 kPa / 29–31 inHg at sea level)
- With engine running, compare MAP sensor value to expected manifold pressure for idle and under load
- Inspect sensor connector and wiring for corrosion, bent pins, damage or loose fit; wiggle harness while monitoring live data
- Measure sensor reference voltage (usually ~5 V) and ground at the connector
- Measure MAP sensor signal voltage while varying engine vacuum (vacuum pump) and compare to expected change
Signal parameters
- Sensor reference voltage: typically ~5 V (check vehicle spec)
- Signal voltage range (typical): ~0.5–4.5 V depending on pressure and sensor design
- BARO reading (ignition ON, engine OFF): ~100–105 kPa (29–31 inHg) at sea level — should match local atmospheric pressure
- MAP reading (engine idle): commonly ~20–40 kPa (5–12 inHg) depending on engine vacuum and altitude; under boost or wide open throttle a MAP sensor will approach atmospheric/above atmospheric pressure
- Continuity/ground resistance: sensor ground should be low resistance to chassis/PCM ground (typically
Diagnostic algorithm
- Verify the code and note freeze-frame data. Clear codes and see if P0105 returns.
- With a scan tool, monitor MAP and BARO PID values at key ON/engine OFF and during idle and load. On key ON (engine off) BARO should match ambient pressure.
- Visually inspect the sensor, connector and wiring harness for damage, corrosion, or loose pins. Repair any obvious issues.
- Backprobe connector: verify reference voltage (~5 V) between reference pin and ground, and verify a good ground at the sensor.
- Measure MAP signal voltage while applying known vacuum or changing engine load; signal should change smoothly with pressure. Use a handheld vacuum pump if available.
- Check for blocked sensor port or vacuum hose; clear or replace if clogged. Perform a smoke test or use approved method to find intake leaks if readings are inconsistent with engine load.
- If wiring and supply voltages are good but signal is stuck/open/shorted, replace the MAP/BARO sensor and retest.
- If a new sensor does not clear the issue, inspect PCM ground connections and wiring back to the PCM. As a last step, consider PCM diagnostics or software updates per factory procedure.
- After repairs, clear codes and road-test to confirm normal operation and that the code does not return.
Likely causes
- Damaged wiring or poor connector at MAP sensor
- Faulty MAP/BARO sensor
- Bad sensor reference (5V) or ground
- Blocked sensor port or vacuum hose leak
Fault status
Status
P0105 — MAP/BARO sensor circuit fault. The PCM detected an open/short or abnormal signal in the MAP/Barometric pressure sensor circuit. Inspect sensor, wiring, connectors, 5V reference and ground; verify MAP and BARO readings and repair as required. Do not assume sensor replacement before checking supply and grounds.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P0105
MITSUBISHI
P — Powertrain
BARO./MAP sensor
Views:
UK: 19
EN: 61
RU: 64
AI status
Completed
Completed
100%
Causes
- Open or short in MAP/BARO sensor signal, reference (5V) or ground circuit
- Corroded or loose connector at the sensor
- Failed MAP/BARO sensor (internal electrical fault)
- Blocked or restricted MAP sensor port or vacuum line
- Intake air leaks between sensor port and intake manifold
- Incorrect reference voltage from PCM or poor PCM ground
Symptoms
- Check Engine Light (MIL) illuminated
- Rough idle, stalling or hard starting
- Poor engine performance, hesitation or reduced power
- Increased fuel consumption or black smoke (rich condition)
- Surging or unstable idle
- Driveability problems that may vary with load/altitude
What to check
- Read freeze frame and live data with a scan tool; note MAP and BARO values and engine conditions when the code set
- With ignition ON (engine off) compare BARO reading to local atmospheric pressure (should be close: ~100–105 kPa / 29–31 inHg at sea level)
- With engine running, compare MAP sensor value to expected manifold pressure for idle and under load
- Inspect sensor connector and wiring for corrosion, bent pins, damage or loose fit; wiggle harness while monitoring live data
- Measure sensor reference voltage (usually ~5 V) and ground at the connector
- Measure MAP sensor signal voltage while varying engine vacuum (vacuum pump) and compare to expected change
Signal parameters
- Sensor reference voltage: typically ~5 V (check vehicle spec)
- Signal voltage range (typical): ~0.5–4.5 V depending on pressure and sensor design
- BARO reading (ignition ON, engine OFF): ~100–105 kPa (29–31 inHg) at sea level — should match local atmospheric pressure
- MAP reading (engine idle): commonly ~20–40 kPa (5–12 inHg) depending on engine vacuum and altitude; under boost or wide open throttle a MAP sensor will approach atmospheric/above atmospheric pressure
- Continuity/ground resistance: sensor ground should be low resistance to chassis/PCM ground (typically
Diagnostic algorithm
- Verify the code and note freeze-frame data. Clear codes and see if P0105 returns.
- With a scan tool, monitor MAP and BARO PID values at key ON/engine OFF and during idle and load. On key ON (engine off) BARO should match ambient pressure.
- Visually inspect the sensor, connector and wiring harness for damage, corrosion, or loose pins. Repair any obvious issues.
- Backprobe connector: verify reference voltage (~5 V) between reference pin and ground, and verify a good ground at the sensor.
- Measure MAP signal voltage while applying known vacuum or changing engine load; signal should change smoothly with pressure. Use a handheld vacuum pump if available.
- Check for blocked sensor port or vacuum hose; clear or replace if clogged. Perform a smoke test or use approved method to find intake leaks if readings are inconsistent with engine load.
- If wiring and supply voltages are good but signal is stuck/open/shorted, replace the MAP/BARO sensor and retest.
- If a new sensor does not clear the issue, inspect PCM ground connections and wiring back to the PCM. As a last step, consider PCM diagnostics or software updates per factory procedure.
- After repairs, clear codes and road-test to confirm normal operation and that the code does not return.
Likely causes
- Damaged wiring or poor connector at MAP sensor
- Faulty MAP/BARO sensor
- Bad sensor reference (5V) or ground
- Blocked sensor port or vacuum hose leak
Fault status
Status
P0105 — MAP/BARO sensor circuit fault. The PCM detected an open/short or abnormal signal in the MAP/Barometric pressure sensor circuit. Inspect sensor, wiring, connectors, 5V reference and ground; verify MAP and BARO readings and repair as required. Do not assume sensor replacement before checking supply and grounds.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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