Code
P1102
DAEWOO
P — Powertrain
MAP SNSR - LOW INPUT
Views:
UK: 2
EN: 4
RU: 5
AI status
Completed
Completed
100%
Causes
- Damaged or shorted MAP sensor signal wire (short to ground)
- Faulty MAP sensor (internal failure)
- Missing or poor 5V reference supply to MAP sensor
- Bad sensor ground or poor chassis ground
- Corroded/loose connector or pins at MAP sensor
- Intake manifold vacuum hose disconnected or collapsed (sensor reference disturbed)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor idle quality, stalling or rough running
- Reduced engine power or hesitation on acceleration
- Erratic or high fuel consumption
- Hard starting or failed closed-loop fuel control
What to check
- Read and record freeze-frame data and full OBD-II list with a scan tool
- Inspect MAP sensor connector, pins and wiring for corrosion, damage or water intrusion
- Visually inspect vacuum hose to MAP sensor for disconnection, cracks or collapse
- With ignition ON (engine OFF) backprobe MAP connector and verify 5V reference is present
- Measure MAP signal voltage at key ON and during idle/cranking and compare to expected values
- Wiggle harness and connectors while monitoring live MAP signal for intermittent faults
Signal parameters
- Typical MAP sensor signal range: ~0.2–4.8 V depending on manifold pressure (manufacturer values may vary)
- Low input condition generally means signal is below approx. 0.2–0.5 V (threshold varies by vehicle)
- With ignition ON engine OFF (atmospheric pressure) many MAP sensors show a higher voltage (often >3.5–4.0 V) — consult vehicle spec
- At idle (with vacuum) expected MAP voltage often in the low-to-mid volt range (varies by engine and sensor); compare live data to spec
Diagnostic algorithm
- Connect a scan tool, read code P1102 and record freeze-frame parameters (engine speed, throttle position, MAP voltage, battery voltage)
- Perform visual inspection of MAP sensor, vacuum hose and connector for damage or contamination
- With ignition OFF disconnect connector and inspect pins for corrosion, bent pins, or water; repair or replace connector as needed
- With ignition ON (engine OFF) backprobe sensor: verify 5V reference on reference pin, good ground on ground pin, and measure signal pin voltage — note values
- If 5V reference is missing, trace back to PCM and check PCM connector and fuses; repair broken reference circuit
- If reference and ground are good but signal is very low (
- If wiring checks OK, substitute a known-good MAP sensor or bench-test replacement sensor to confirm sensor failure
- After any repair, clear codes and road test while monitoring live MAP data to verify proper operation and that the code does not return
- If wiring and sensor test good and fault persists, suspect PCM fault and verify PCM wiring and grounds; consult wiring diagrams and consider PCM repair/replacement only after excluding all other causes
Likely causes
- Open or shorted signal wiring between MAP sensor and PCM
- Failed MAP sensor
- Failed 5V reference or ground at sensor
- Corroded/loose sensor connector pins causing intermittent low voltage
Fault status
Status
MAP sensor circuit low input detected — MAP signal voltage below expected range.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1102
KIA
P — Powertrain
HO2S11 Heater Circuit High Voltage
Views:
UK: 11
EN: 21
RU: 22
AI status
Completed
Completed
100%
Causes
- Damaged or shorted MAP sensor signal wire (short to ground)
- Faulty MAP sensor (internal failure)
- Missing or poor 5V reference supply to MAP sensor
- Bad sensor ground or poor chassis ground
- Corroded/loose connector or pins at MAP sensor
- Intake manifold vacuum hose disconnected or collapsed (sensor reference disturbed)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor idle quality, stalling or rough running
- Reduced engine power or hesitation on acceleration
- Erratic or high fuel consumption
- Hard starting or failed closed-loop fuel control
What to check
- Read and record freeze-frame data and full OBD-II list with a scan tool
- Inspect MAP sensor connector, pins and wiring for corrosion, damage or water intrusion
- Visually inspect vacuum hose to MAP sensor for disconnection, cracks or collapse
- With ignition ON (engine OFF) backprobe MAP connector and verify 5V reference is present
- Measure MAP signal voltage at key ON and during idle/cranking and compare to expected values
- Wiggle harness and connectors while monitoring live MAP signal for intermittent faults
Signal parameters
- Typical MAP sensor signal range: ~0.2–4.8 V depending on manifold pressure (manufacturer values may vary)
- Low input condition generally means signal is below approx. 0.2–0.5 V (threshold varies by vehicle)
- With ignition ON engine OFF (atmospheric pressure) many MAP sensors show a higher voltage (often >3.5–4.0 V) — consult vehicle spec
- At idle (with vacuum) expected MAP voltage often in the low-to-mid volt range (varies by engine and sensor); compare live data to spec
Diagnostic algorithm
- Connect a scan tool, read code P1102 and record freeze-frame parameters (engine speed, throttle position, MAP voltage, battery voltage)
- Perform visual inspection of MAP sensor, vacuum hose and connector for damage or contamination
- With ignition OFF disconnect connector and inspect pins for corrosion, bent pins, or water; repair or replace connector as needed
- With ignition ON (engine OFF) backprobe sensor: verify 5V reference on reference pin, good ground on ground pin, and measure signal pin voltage — note values
- If 5V reference is missing, trace back to PCM and check PCM connector and fuses; repair broken reference circuit
- If reference and ground are good but signal is very low (
- If wiring checks OK, substitute a known-good MAP sensor or bench-test replacement sensor to confirm sensor failure
- After any repair, clear codes and road test while monitoring live MAP data to verify proper operation and that the code does not return
- If wiring and sensor test good and fault persists, suspect PCM fault and verify PCM wiring and grounds; consult wiring diagrams and consider PCM repair/replacement only after excluding all other causes
Likely causes
- Open or shorted signal wiring between MAP sensor and PCM
- Failed MAP sensor
- Failed 5V reference or ground at sensor
- Corroded/loose sensor connector pins causing intermittent low voltage
Fault status
Status
MAP sensor circuit low input detected — MAP signal voltage below expected range.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1102
LAND ROVER
P — Powertrain
Air flow sensor within range, but less than expected
Views:
UK: 2
EN: 6
RU: 10
AI status
Completed
Completed
100%
Causes
- Damaged or shorted MAP sensor signal wire (short to ground)
- Faulty MAP sensor (internal failure)
- Missing or poor 5V reference supply to MAP sensor
- Bad sensor ground or poor chassis ground
- Corroded/loose connector or pins at MAP sensor
- Intake manifold vacuum hose disconnected or collapsed (sensor reference disturbed)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor idle quality, stalling or rough running
- Reduced engine power or hesitation on acceleration
- Erratic or high fuel consumption
- Hard starting or failed closed-loop fuel control
What to check
- Read and record freeze-frame data and full OBD-II list with a scan tool
- Inspect MAP sensor connector, pins and wiring for corrosion, damage or water intrusion
- Visually inspect vacuum hose to MAP sensor for disconnection, cracks or collapse
- With ignition ON (engine OFF) backprobe MAP connector and verify 5V reference is present
- Measure MAP signal voltage at key ON and during idle/cranking and compare to expected values
- Wiggle harness and connectors while monitoring live MAP signal for intermittent faults
Signal parameters
- Typical MAP sensor signal range: ~0.2–4.8 V depending on manifold pressure (manufacturer values may vary)
- Low input condition generally means signal is below approx. 0.2–0.5 V (threshold varies by vehicle)
- With ignition ON engine OFF (atmospheric pressure) many MAP sensors show a higher voltage (often >3.5–4.0 V) — consult vehicle spec
- At idle (with vacuum) expected MAP voltage often in the low-to-mid volt range (varies by engine and sensor); compare live data to spec
Diagnostic algorithm
- Connect a scan tool, read code P1102 and record freeze-frame parameters (engine speed, throttle position, MAP voltage, battery voltage)
- Perform visual inspection of MAP sensor, vacuum hose and connector for damage or contamination
- With ignition OFF disconnect connector and inspect pins for corrosion, bent pins, or water; repair or replace connector as needed
- With ignition ON (engine OFF) backprobe sensor: verify 5V reference on reference pin, good ground on ground pin, and measure signal pin voltage — note values
- If 5V reference is missing, trace back to PCM and check PCM connector and fuses; repair broken reference circuit
- If reference and ground are good but signal is very low (
- If wiring checks OK, substitute a known-good MAP sensor or bench-test replacement sensor to confirm sensor failure
- After any repair, clear codes and road test while monitoring live MAP data to verify proper operation and that the code does not return
- If wiring and sensor test good and fault persists, suspect PCM fault and verify PCM wiring and grounds; consult wiring diagrams and consider PCM repair/replacement only after excluding all other causes
Likely causes
- Open or shorted signal wiring between MAP sensor and PCM
- Failed MAP sensor
- Failed 5V reference or ground at sensor
- Corroded/loose sensor connector pins causing intermittent low voltage
Fault status
Status
MAP sensor circuit low input detected — MAP signal voltage below expected range.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1102
MAZDA
P — Powertrain
Mass Air Flow Sensor Signal Inconsistent With Throttle Position Sensor
Views:
UK: 15
EN: 20
RU: 22
AI status
Completed
Completed
100%
Causes
- Damaged or shorted MAP sensor signal wire (short to ground)
- Faulty MAP sensor (internal failure)
- Missing or poor 5V reference supply to MAP sensor
- Bad sensor ground or poor chassis ground
- Corroded/loose connector or pins at MAP sensor
- Intake manifold vacuum hose disconnected or collapsed (sensor reference disturbed)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor idle quality, stalling or rough running
- Reduced engine power or hesitation on acceleration
- Erratic or high fuel consumption
- Hard starting or failed closed-loop fuel control
What to check
- Read and record freeze-frame data and full OBD-II list with a scan tool
- Inspect MAP sensor connector, pins and wiring for corrosion, damage or water intrusion
- Visually inspect vacuum hose to MAP sensor for disconnection, cracks or collapse
- With ignition ON (engine OFF) backprobe MAP connector and verify 5V reference is present
- Measure MAP signal voltage at key ON and during idle/cranking and compare to expected values
- Wiggle harness and connectors while monitoring live MAP signal for intermittent faults
Signal parameters
- Typical MAP sensor signal range: ~0.2–4.8 V depending on manifold pressure (manufacturer values may vary)
- Low input condition generally means signal is below approx. 0.2–0.5 V (threshold varies by vehicle)
- With ignition ON engine OFF (atmospheric pressure) many MAP sensors show a higher voltage (often >3.5–4.0 V) — consult vehicle spec
- At idle (with vacuum) expected MAP voltage often in the low-to-mid volt range (varies by engine and sensor); compare live data to spec
Diagnostic algorithm
- Connect a scan tool, read code P1102 and record freeze-frame parameters (engine speed, throttle position, MAP voltage, battery voltage)
- Perform visual inspection of MAP sensor, vacuum hose and connector for damage or contamination
- With ignition OFF disconnect connector and inspect pins for corrosion, bent pins, or water; repair or replace connector as needed
- With ignition ON (engine OFF) backprobe sensor: verify 5V reference on reference pin, good ground on ground pin, and measure signal pin voltage — note values
- If 5V reference is missing, trace back to PCM and check PCM connector and fuses; repair broken reference circuit
- If reference and ground are good but signal is very low (
- If wiring checks OK, substitute a known-good MAP sensor or bench-test replacement sensor to confirm sensor failure
- After any repair, clear codes and road test while monitoring live MAP data to verify proper operation and that the code does not return
- If wiring and sensor test good and fault persists, suspect PCM fault and verify PCM wiring and grounds; consult wiring diagrams and consider PCM repair/replacement only after excluding all other causes
Likely causes
- Open or shorted signal wiring between MAP sensor and PCM
- Failed MAP sensor
- Failed 5V reference or ground at sensor
- Corroded/loose sensor connector pins causing intermittent low voltage
Fault status
Status
MAP sensor circuit low input detected — MAP signal voltage below expected range.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1102
MITSUBISHI
P — Powertrain
Traction Control Ventilation Solenoid Circuit Fault
Views:
UK: 16
EN: 23
RU: 28
AI status
Completed
Completed
100%
Causes
- Damaged or shorted MAP sensor signal wire (short to ground)
- Faulty MAP sensor (internal failure)
- Missing or poor 5V reference supply to MAP sensor
- Bad sensor ground or poor chassis ground
- Corroded/loose connector or pins at MAP sensor
- Intake manifold vacuum hose disconnected or collapsed (sensor reference disturbed)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor idle quality, stalling or rough running
- Reduced engine power or hesitation on acceleration
- Erratic or high fuel consumption
- Hard starting or failed closed-loop fuel control
What to check
- Read and record freeze-frame data and full OBD-II list with a scan tool
- Inspect MAP sensor connector, pins and wiring for corrosion, damage or water intrusion
- Visually inspect vacuum hose to MAP sensor for disconnection, cracks or collapse
- With ignition ON (engine OFF) backprobe MAP connector and verify 5V reference is present
- Measure MAP signal voltage at key ON and during idle/cranking and compare to expected values
- Wiggle harness and connectors while monitoring live MAP signal for intermittent faults
Signal parameters
- Typical MAP sensor signal range: ~0.2–4.8 V depending on manifold pressure (manufacturer values may vary)
- Low input condition generally means signal is below approx. 0.2–0.5 V (threshold varies by vehicle)
- With ignition ON engine OFF (atmospheric pressure) many MAP sensors show a higher voltage (often >3.5–4.0 V) — consult vehicle spec
- At idle (with vacuum) expected MAP voltage often in the low-to-mid volt range (varies by engine and sensor); compare live data to spec
Diagnostic algorithm
- Connect a scan tool, read code P1102 and record freeze-frame parameters (engine speed, throttle position, MAP voltage, battery voltage)
- Perform visual inspection of MAP sensor, vacuum hose and connector for damage or contamination
- With ignition OFF disconnect connector and inspect pins for corrosion, bent pins, or water; repair or replace connector as needed
- With ignition ON (engine OFF) backprobe sensor: verify 5V reference on reference pin, good ground on ground pin, and measure signal pin voltage — note values
- If 5V reference is missing, trace back to PCM and check PCM connector and fuses; repair broken reference circuit
- If reference and ground are good but signal is very low (
- If wiring checks OK, substitute a known-good MAP sensor or bench-test replacement sensor to confirm sensor failure
- After any repair, clear codes and road test while monitoring live MAP data to verify proper operation and that the code does not return
- If wiring and sensor test good and fault persists, suspect PCM fault and verify PCM wiring and grounds; consult wiring diagrams and consider PCM repair/replacement only after excluding all other causes
Likely causes
- Open or shorted signal wiring between MAP sensor and PCM
- Failed MAP sensor
- Failed 5V reference or ground at sensor
- Corroded/loose sensor connector pins causing intermittent low voltage
Fault status
Status
MAP sensor circuit low input detected — MAP signal voltage below expected range.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1102
Other
P — Powertrain
MAF Sensor In Range But Lower Than Expected
Views:
UK: 11
EN: 18
RU: 24
AI status
Completed
Completed
100%
Causes
- Damaged or shorted MAP sensor signal wire (short to ground)
- Faulty MAP sensor (internal failure)
- Missing or poor 5V reference supply to MAP sensor
- Bad sensor ground or poor chassis ground
- Corroded/loose connector or pins at MAP sensor
- Intake manifold vacuum hose disconnected or collapsed (sensor reference disturbed)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor idle quality, stalling or rough running
- Reduced engine power or hesitation on acceleration
- Erratic or high fuel consumption
- Hard starting or failed closed-loop fuel control
What to check
- Read and record freeze-frame data and full OBD-II list with a scan tool
- Inspect MAP sensor connector, pins and wiring for corrosion, damage or water intrusion
- Visually inspect vacuum hose to MAP sensor for disconnection, cracks or collapse
- With ignition ON (engine OFF) backprobe MAP connector and verify 5V reference is present
- Measure MAP signal voltage at key ON and during idle/cranking and compare to expected values
- Wiggle harness and connectors while monitoring live MAP signal for intermittent faults
Signal parameters
- Typical MAP sensor signal range: ~0.2–4.8 V depending on manifold pressure (manufacturer values may vary)
- Low input condition generally means signal is below approx. 0.2–0.5 V (threshold varies by vehicle)
- With ignition ON engine OFF (atmospheric pressure) many MAP sensors show a higher voltage (often >3.5–4.0 V) — consult vehicle spec
- At idle (with vacuum) expected MAP voltage often in the low-to-mid volt range (varies by engine and sensor); compare live data to spec
Diagnostic algorithm
- Connect a scan tool, read code P1102 and record freeze-frame parameters (engine speed, throttle position, MAP voltage, battery voltage)
- Perform visual inspection of MAP sensor, vacuum hose and connector for damage or contamination
- With ignition OFF disconnect connector and inspect pins for corrosion, bent pins, or water; repair or replace connector as needed
- With ignition ON (engine OFF) backprobe sensor: verify 5V reference on reference pin, good ground on ground pin, and measure signal pin voltage — note values
- If 5V reference is missing, trace back to PCM and check PCM connector and fuses; repair broken reference circuit
- If reference and ground are good but signal is very low (
- If wiring checks OK, substitute a known-good MAP sensor or bench-test replacement sensor to confirm sensor failure
- After any repair, clear codes and road test while monitoring live MAP data to verify proper operation and that the code does not return
- If wiring and sensor test good and fault persists, suspect PCM fault and verify PCM wiring and grounds; consult wiring diagrams and consider PCM repair/replacement only after excluding all other causes
Likely causes
- Open or shorted signal wiring between MAP sensor and PCM
- Failed MAP sensor
- Failed 5V reference or ground at sensor
- Corroded/loose sensor connector pins causing intermittent low voltage
Fault status
Status
MAP sensor circuit low input detected — MAP signal voltage below expected range.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1102
PORSCHE
P — Powertrain
Heating of HO2S 1 ahead of TWC
Views:
UK: 2
EN: 2
RU: 6
AI status
Completed
Completed
100%
Causes
- Damaged or shorted MAP sensor signal wire (short to ground)
- Faulty MAP sensor (internal failure)
- Missing or poor 5V reference supply to MAP sensor
- Bad sensor ground or poor chassis ground
- Corroded/loose connector or pins at MAP sensor
- Intake manifold vacuum hose disconnected or collapsed (sensor reference disturbed)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor idle quality, stalling or rough running
- Reduced engine power or hesitation on acceleration
- Erratic or high fuel consumption
- Hard starting or failed closed-loop fuel control
What to check
- Read and record freeze-frame data and full OBD-II list with a scan tool
- Inspect MAP sensor connector, pins and wiring for corrosion, damage or water intrusion
- Visually inspect vacuum hose to MAP sensor for disconnection, cracks or collapse
- With ignition ON (engine OFF) backprobe MAP connector and verify 5V reference is present
- Measure MAP signal voltage at key ON and during idle/cranking and compare to expected values
- Wiggle harness and connectors while monitoring live MAP signal for intermittent faults
Signal parameters
- Typical MAP sensor signal range: ~0.2–4.8 V depending on manifold pressure (manufacturer values may vary)
- Low input condition generally means signal is below approx. 0.2–0.5 V (threshold varies by vehicle)
- With ignition ON engine OFF (atmospheric pressure) many MAP sensors show a higher voltage (often >3.5–4.0 V) — consult vehicle spec
- At idle (with vacuum) expected MAP voltage often in the low-to-mid volt range (varies by engine and sensor); compare live data to spec
Diagnostic algorithm
- Connect a scan tool, read code P1102 and record freeze-frame parameters (engine speed, throttle position, MAP voltage, battery voltage)
- Perform visual inspection of MAP sensor, vacuum hose and connector for damage or contamination
- With ignition OFF disconnect connector and inspect pins for corrosion, bent pins, or water; repair or replace connector as needed
- With ignition ON (engine OFF) backprobe sensor: verify 5V reference on reference pin, good ground on ground pin, and measure signal pin voltage — note values
- If 5V reference is missing, trace back to PCM and check PCM connector and fuses; repair broken reference circuit
- If reference and ground are good but signal is very low (
- If wiring checks OK, substitute a known-good MAP sensor or bench-test replacement sensor to confirm sensor failure
- After any repair, clear codes and road test while monitoring live MAP data to verify proper operation and that the code does not return
- If wiring and sensor test good and fault persists, suspect PCM fault and verify PCM wiring and grounds; consult wiring diagrams and consider PCM repair/replacement only after excluding all other causes
Likely causes
- Open or shorted signal wiring between MAP sensor and PCM
- Failed MAP sensor
- Failed 5V reference or ground at sensor
- Corroded/loose sensor connector pins causing intermittent low voltage
Fault status
Status
MAP sensor circuit low input detected — MAP signal voltage below expected range.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1102
RAM
P — Powertrain
HEV Stop Request Performance
Views:
UK: 2
EN: 2
RU: 1
AI status
Completed
Completed
100%
Causes
- Damaged or shorted MAP sensor signal wire (short to ground)
- Faulty MAP sensor (internal failure)
- Missing or poor 5V reference supply to MAP sensor
- Bad sensor ground or poor chassis ground
- Corroded/loose connector or pins at MAP sensor
- Intake manifold vacuum hose disconnected or collapsed (sensor reference disturbed)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor idle quality, stalling or rough running
- Reduced engine power or hesitation on acceleration
- Erratic or high fuel consumption
- Hard starting or failed closed-loop fuel control
What to check
- Read and record freeze-frame data and full OBD-II list with a scan tool
- Inspect MAP sensor connector, pins and wiring for corrosion, damage or water intrusion
- Visually inspect vacuum hose to MAP sensor for disconnection, cracks or collapse
- With ignition ON (engine OFF) backprobe MAP connector and verify 5V reference is present
- Measure MAP signal voltage at key ON and during idle/cranking and compare to expected values
- Wiggle harness and connectors while monitoring live MAP signal for intermittent faults
Signal parameters
- Typical MAP sensor signal range: ~0.2–4.8 V depending on manifold pressure (manufacturer values may vary)
- Low input condition generally means signal is below approx. 0.2–0.5 V (threshold varies by vehicle)
- With ignition ON engine OFF (atmospheric pressure) many MAP sensors show a higher voltage (often >3.5–4.0 V) — consult vehicle spec
- At idle (with vacuum) expected MAP voltage often in the low-to-mid volt range (varies by engine and sensor); compare live data to spec
Diagnostic algorithm
- Connect a scan tool, read code P1102 and record freeze-frame parameters (engine speed, throttle position, MAP voltage, battery voltage)
- Perform visual inspection of MAP sensor, vacuum hose and connector for damage or contamination
- With ignition OFF disconnect connector and inspect pins for corrosion, bent pins, or water; repair or replace connector as needed
- With ignition ON (engine OFF) backprobe sensor: verify 5V reference on reference pin, good ground on ground pin, and measure signal pin voltage — note values
- If 5V reference is missing, trace back to PCM and check PCM connector and fuses; repair broken reference circuit
- If reference and ground are good but signal is very low (
- If wiring checks OK, substitute a known-good MAP sensor or bench-test replacement sensor to confirm sensor failure
- After any repair, clear codes and road test while monitoring live MAP data to verify proper operation and that the code does not return
- If wiring and sensor test good and fault persists, suspect PCM fault and verify PCM wiring and grounds; consult wiring diagrams and consider PCM repair/replacement only after excluding all other causes
Likely causes
- Open or shorted signal wiring between MAP sensor and PCM
- Failed MAP sensor
- Failed 5V reference or ground at sensor
- Corroded/loose sensor connector pins causing intermittent low voltage
Fault status
Status
MAP sensor circuit low input detected — MAP signal voltage below expected range.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1102
SAAB
P — Powertrain
Front HO2S Bank 1, Control Module Input, Current in Pre-Heating Circuit Too High
Views:
UK: 3
EN: 3
RU: 5
AI status
Completed
Completed
100%
Causes
- Damaged or shorted MAP sensor signal wire (short to ground)
- Faulty MAP sensor (internal failure)
- Missing or poor 5V reference supply to MAP sensor
- Bad sensor ground or poor chassis ground
- Corroded/loose connector or pins at MAP sensor
- Intake manifold vacuum hose disconnected or collapsed (sensor reference disturbed)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor idle quality, stalling or rough running
- Reduced engine power or hesitation on acceleration
- Erratic or high fuel consumption
- Hard starting or failed closed-loop fuel control
What to check
- Read and record freeze-frame data and full OBD-II list with a scan tool
- Inspect MAP sensor connector, pins and wiring for corrosion, damage or water intrusion
- Visually inspect vacuum hose to MAP sensor for disconnection, cracks or collapse
- With ignition ON (engine OFF) backprobe MAP connector and verify 5V reference is present
- Measure MAP signal voltage at key ON and during idle/cranking and compare to expected values
- Wiggle harness and connectors while monitoring live MAP signal for intermittent faults
Signal parameters
- Typical MAP sensor signal range: ~0.2–4.8 V depending on manifold pressure (manufacturer values may vary)
- Low input condition generally means signal is below approx. 0.2–0.5 V (threshold varies by vehicle)
- With ignition ON engine OFF (atmospheric pressure) many MAP sensors show a higher voltage (often >3.5–4.0 V) — consult vehicle spec
- At idle (with vacuum) expected MAP voltage often in the low-to-mid volt range (varies by engine and sensor); compare live data to spec
Diagnostic algorithm
- Connect a scan tool, read code P1102 and record freeze-frame parameters (engine speed, throttle position, MAP voltage, battery voltage)
- Perform visual inspection of MAP sensor, vacuum hose and connector for damage or contamination
- With ignition OFF disconnect connector and inspect pins for corrosion, bent pins, or water; repair or replace connector as needed
- With ignition ON (engine OFF) backprobe sensor: verify 5V reference on reference pin, good ground on ground pin, and measure signal pin voltage — note values
- If 5V reference is missing, trace back to PCM and check PCM connector and fuses; repair broken reference circuit
- If reference and ground are good but signal is very low (
- If wiring checks OK, substitute a known-good MAP sensor or bench-test replacement sensor to confirm sensor failure
- After any repair, clear codes and road test while monitoring live MAP data to verify proper operation and that the code does not return
- If wiring and sensor test good and fault persists, suspect PCM fault and verify PCM wiring and grounds; consult wiring diagrams and consider PCM repair/replacement only after excluding all other causes
Likely causes
- Open or shorted signal wiring between MAP sensor and PCM
- Failed MAP sensor
- Failed 5V reference or ground at sensor
- Corroded/loose sensor connector pins causing intermittent low voltage
Fault status
Status
MAP sensor circuit low input detected — MAP signal voltage below expected range.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1102
SUBARU
P — Powertrain
Pressure Sources Solenoid Valve Circuit Malfunction
Views:
UK: 12
EN: 20
RU: 22
AI status
Completed
Completed
100%
Causes
- Damaged or shorted MAP sensor signal wire (short to ground)
- Faulty MAP sensor (internal failure)
- Missing or poor 5V reference supply to MAP sensor
- Bad sensor ground or poor chassis ground
- Corroded/loose connector or pins at MAP sensor
- Intake manifold vacuum hose disconnected or collapsed (sensor reference disturbed)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor idle quality, stalling or rough running
- Reduced engine power or hesitation on acceleration
- Erratic or high fuel consumption
- Hard starting or failed closed-loop fuel control
What to check
- Read and record freeze-frame data and full OBD-II list with a scan tool
- Inspect MAP sensor connector, pins and wiring for corrosion, damage or water intrusion
- Visually inspect vacuum hose to MAP sensor for disconnection, cracks or collapse
- With ignition ON (engine OFF) backprobe MAP connector and verify 5V reference is present
- Measure MAP signal voltage at key ON and during idle/cranking and compare to expected values
- Wiggle harness and connectors while monitoring live MAP signal for intermittent faults
Signal parameters
- Typical MAP sensor signal range: ~0.2–4.8 V depending on manifold pressure (manufacturer values may vary)
- Low input condition generally means signal is below approx. 0.2–0.5 V (threshold varies by vehicle)
- With ignition ON engine OFF (atmospheric pressure) many MAP sensors show a higher voltage (often >3.5–4.0 V) — consult vehicle spec
- At idle (with vacuum) expected MAP voltage often in the low-to-mid volt range (varies by engine and sensor); compare live data to spec
Diagnostic algorithm
- Connect a scan tool, read code P1102 and record freeze-frame parameters (engine speed, throttle position, MAP voltage, battery voltage)
- Perform visual inspection of MAP sensor, vacuum hose and connector for damage or contamination
- With ignition OFF disconnect connector and inspect pins for corrosion, bent pins, or water; repair or replace connector as needed
- With ignition ON (engine OFF) backprobe sensor: verify 5V reference on reference pin, good ground on ground pin, and measure signal pin voltage — note values
- If 5V reference is missing, trace back to PCM and check PCM connector and fuses; repair broken reference circuit
- If reference and ground are good but signal is very low (
- If wiring checks OK, substitute a known-good MAP sensor or bench-test replacement sensor to confirm sensor failure
- After any repair, clear codes and road test while monitoring live MAP data to verify proper operation and that the code does not return
- If wiring and sensor test good and fault persists, suspect PCM fault and verify PCM wiring and grounds; consult wiring diagrams and consider PCM repair/replacement only after excluding all other causes
Likely causes
- Open or shorted signal wiring between MAP sensor and PCM
- Failed MAP sensor
- Failed 5V reference or ground at sensor
- Corroded/loose sensor connector pins causing intermittent low voltage
Fault status
Status
MAP sensor circuit low input detected — MAP signal voltage below expected range.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
P1102
VOLKSWAGEN
P — Powertrain
Oxygen Sensor Heating Circuit Bank 1 Sensor 1 Voltage Too Low/Air Leak
Views:
UK: 17
EN: 23
RU: 33
AI status
Completed
Completed
100%
Causes
- Damaged or shorted MAP sensor signal wire (short to ground)
- Faulty MAP sensor (internal failure)
- Missing or poor 5V reference supply to MAP sensor
- Bad sensor ground or poor chassis ground
- Corroded/loose connector or pins at MAP sensor
- Intake manifold vacuum hose disconnected or collapsed (sensor reference disturbed)
Symptoms
- Check Engine Light (MIL) illuminated
- Poor idle quality, stalling or rough running
- Reduced engine power or hesitation on acceleration
- Erratic or high fuel consumption
- Hard starting or failed closed-loop fuel control
What to check
- Read and record freeze-frame data and full OBD-II list with a scan tool
- Inspect MAP sensor connector, pins and wiring for corrosion, damage or water intrusion
- Visually inspect vacuum hose to MAP sensor for disconnection, cracks or collapse
- With ignition ON (engine OFF) backprobe MAP connector and verify 5V reference is present
- Measure MAP signal voltage at key ON and during idle/cranking and compare to expected values
- Wiggle harness and connectors while monitoring live MAP signal for intermittent faults
Signal parameters
- Typical MAP sensor signal range: ~0.2–4.8 V depending on manifold pressure (manufacturer values may vary)
- Low input condition generally means signal is below approx. 0.2–0.5 V (threshold varies by vehicle)
- With ignition ON engine OFF (atmospheric pressure) many MAP sensors show a higher voltage (often >3.5–4.0 V) — consult vehicle spec
- At idle (with vacuum) expected MAP voltage often in the low-to-mid volt range (varies by engine and sensor); compare live data to spec
Diagnostic algorithm
- Connect a scan tool, read code P1102 and record freeze-frame parameters (engine speed, throttle position, MAP voltage, battery voltage)
- Perform visual inspection of MAP sensor, vacuum hose and connector for damage or contamination
- With ignition OFF disconnect connector and inspect pins for corrosion, bent pins, or water; repair or replace connector as needed
- With ignition ON (engine OFF) backprobe sensor: verify 5V reference on reference pin, good ground on ground pin, and measure signal pin voltage — note values
- If 5V reference is missing, trace back to PCM and check PCM connector and fuses; repair broken reference circuit
- If reference and ground are good but signal is very low (
- If wiring checks OK, substitute a known-good MAP sensor or bench-test replacement sensor to confirm sensor failure
- After any repair, clear codes and road test while monitoring live MAP data to verify proper operation and that the code does not return
- If wiring and sensor test good and fault persists, suspect PCM fault and verify PCM wiring and grounds; consult wiring diagrams and consider PCM repair/replacement only after excluding all other causes
Likely causes
- Open or shorted signal wiring between MAP sensor and PCM
- Failed MAP sensor
- Failed 5V reference or ground at sensor
- Corroded/loose sensor connector pins causing intermittent low voltage
Fault status
Status
MAP sensor circuit low input detected — MAP signal voltage below expected range.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email