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Home / DTC / P2229 — Barometric Pressure Sensor A Circuit High

P2229 — Barometric Pressure Sensor A Circuit High

Detailed page for trouble code P2229.

34,288codes
59brands
11,797generic
22,491specific
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Code

P2229

Generic P — Powertrain

Barometric Pressure Sensor A Circuit High

Brand: Generic
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Shorted wiring to 5V reference or another power source
  • Failed/barometric pressure sensor producing excessive output
  • Poor or missing ground at sensor or ECM
  • Short to battery voltage or another sensor circuit
  • Corroded/damaged connector or wiring harness
  • Intermittent/failed ECM input circuit

Symptoms

  • Check Engine Light (MIL) illuminated
  • Reduced engine performance, poor drivability or rough idle (depending on vehicle strategy)
  • Long crank or hard starting in some conditions
  • Stored diagnostic trouble code P2229 and possible related codes

What to check

  • Scan for current and pending codes; record freeze frame and live data (BARO sensor voltage/pressure)
  • Visually inspect the BARO sensor, connector and wiring for damage, corrosion or pin push-out
  • Backprobe the sensor connector with key ON (engine OFF) to check reference voltage, ground and signal voltage
  • Compare BARO sensor value to ambient pressure or MAP sensor reading (if available) in live data
  • Wiggle harness while observing live data to find intermittent faults

Signal parameters

  • Sensor type: typically an analog voltage output (0.5–4.5 V typical range depending on design)
  • Reference supply: stable 5V reference from ECM (verify presence at sensor connector)
  • Ground: good chassis/ECM ground required for accurate signal
  • Expected behavior: signal varies with ambient pressure; should not be stuck at a high voltage or equal to reference voltage

Diagnostic algorithm

  1. Retrieve and save codes and freeze-frame data. Note related codes and engine conditions.
  2. Inspect the BARO sensor, connector and wiring for contamination, damage, or corrosion. Repair physical damage.
  3. With key ON (engine OFF), backprobe connector: verify 5V reference and good ground at the sensor harness pins.
  4. Measure sensor output voltage at the signal pin. If output is higher than expected (near 5V), proceed.
  5. Disconnect the sensor: re-check the signal circuit voltage at the harness. If voltage remains high with sensor disconnected, suspect a short to 5V or power source in the wiring or ECM.
  6. Perform continuity checks from sensor signal pin to ECM input pin and check for shorts to battery + and to reference 5V using an ohmmeter. Repair wiring as needed.
  7. If wiring and connector are good but the sensor output remains high when connected, replace the BARO sensor and retest.
  8. If problem persists after sensor and wiring replacement, investigate ECM input circuit or replace/repair ECM per manufacturer procedure.
  9. Clear codes and road test to confirm repair. Re-scan for recurrence and verify live BARO readings are within expected range.

Likely causes

  • Corroded or damaged sensor connector causing a voltage leak
  • Short between sensor signal wire and 5V reference wire
  • Failed BARO sensor element producing a high voltage
  • Open/weak ground at sensor or engine control module

Fault status

⚠️ Status
Barometric Pressure Sensor A Circuit High — ECM detected a higher-than-expected voltage on the BARO sensor A circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

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Code

P2229

ISUZU P — Powertrain

Barometric Pressure Circuit High

Brand: ISUZU
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Shorted wiring to 5V reference or another power source
  • Failed/barometric pressure sensor producing excessive output
  • Poor or missing ground at sensor or ECM
  • Short to battery voltage or another sensor circuit
  • Corroded/damaged connector or wiring harness
  • Intermittent/failed ECM input circuit

Symptoms

  • Check Engine Light (MIL) illuminated
  • Reduced engine performance, poor drivability or rough idle (depending on vehicle strategy)
  • Long crank or hard starting in some conditions
  • Stored diagnostic trouble code P2229 and possible related codes

What to check

  • Scan for current and pending codes; record freeze frame and live data (BARO sensor voltage/pressure)
  • Visually inspect the BARO sensor, connector and wiring for damage, corrosion or pin push-out
  • Backprobe the sensor connector with key ON (engine OFF) to check reference voltage, ground and signal voltage
  • Compare BARO sensor value to ambient pressure or MAP sensor reading (if available) in live data
  • Wiggle harness while observing live data to find intermittent faults

Signal parameters

  • Sensor type: typically an analog voltage output (0.5–4.5 V typical range depending on design)
  • Reference supply: stable 5V reference from ECM (verify presence at sensor connector)
  • Ground: good chassis/ECM ground required for accurate signal
  • Expected behavior: signal varies with ambient pressure; should not be stuck at a high voltage or equal to reference voltage

Diagnostic algorithm

  1. Retrieve and save codes and freeze-frame data. Note related codes and engine conditions.
  2. Inspect the BARO sensor, connector and wiring for contamination, damage, or corrosion. Repair physical damage.
  3. With key ON (engine OFF), backprobe connector: verify 5V reference and good ground at the sensor harness pins.
  4. Measure sensor output voltage at the signal pin. If output is higher than expected (near 5V), proceed.
  5. Disconnect the sensor: re-check the signal circuit voltage at the harness. If voltage remains high with sensor disconnected, suspect a short to 5V or power source in the wiring or ECM.
  6. Perform continuity checks from sensor signal pin to ECM input pin and check for shorts to battery + and to reference 5V using an ohmmeter. Repair wiring as needed.
  7. If wiring and connector are good but the sensor output remains high when connected, replace the BARO sensor and retest.
  8. If problem persists after sensor and wiring replacement, investigate ECM input circuit or replace/repair ECM per manufacturer procedure.
  9. Clear codes and road test to confirm repair. Re-scan for recurrence and verify live BARO readings are within expected range.

Likely causes

  • Corroded or damaged sensor connector causing a voltage leak
  • Short between sensor signal wire and 5V reference wire
  • Failed BARO sensor element producing a high voltage
  • Open/weak ground at sensor or engine control module

Fault status

⚠️ Status
Barometric Pressure Sensor A Circuit High — ECM detected a higher-than-expected voltage on the BARO sensor A circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0108 P0118 P0191 P2226 P2230
Repair manuals

Manual library for ISUZU

86

Browse 86 ISUZU manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

ISUZU

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Code

P2229

LAND ROVER P — Powertrain

High barometric pressure input circuit

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Shorted wiring to 5V reference or another power source
  • Failed/barometric pressure sensor producing excessive output
  • Poor or missing ground at sensor or ECM
  • Short to battery voltage or another sensor circuit
  • Corroded/damaged connector or wiring harness
  • Intermittent/failed ECM input circuit

Symptoms

  • Check Engine Light (MIL) illuminated
  • Reduced engine performance, poor drivability or rough idle (depending on vehicle strategy)
  • Long crank or hard starting in some conditions
  • Stored diagnostic trouble code P2229 and possible related codes

What to check

  • Scan for current and pending codes; record freeze frame and live data (BARO sensor voltage/pressure)
  • Visually inspect the BARO sensor, connector and wiring for damage, corrosion or pin push-out
  • Backprobe the sensor connector with key ON (engine OFF) to check reference voltage, ground and signal voltage
  • Compare BARO sensor value to ambient pressure or MAP sensor reading (if available) in live data
  • Wiggle harness while observing live data to find intermittent faults

Signal parameters

  • Sensor type: typically an analog voltage output (0.5–4.5 V typical range depending on design)
  • Reference supply: stable 5V reference from ECM (verify presence at sensor connector)
  • Ground: good chassis/ECM ground required for accurate signal
  • Expected behavior: signal varies with ambient pressure; should not be stuck at a high voltage or equal to reference voltage

Diagnostic algorithm

  1. Retrieve and save codes and freeze-frame data. Note related codes and engine conditions.
  2. Inspect the BARO sensor, connector and wiring for contamination, damage, or corrosion. Repair physical damage.
  3. With key ON (engine OFF), backprobe connector: verify 5V reference and good ground at the sensor harness pins.
  4. Measure sensor output voltage at the signal pin. If output is higher than expected (near 5V), proceed.
  5. Disconnect the sensor: re-check the signal circuit voltage at the harness. If voltage remains high with sensor disconnected, suspect a short to 5V or power source in the wiring or ECM.
  6. Perform continuity checks from sensor signal pin to ECM input pin and check for shorts to battery + and to reference 5V using an ohmmeter. Repair wiring as needed.
  7. If wiring and connector are good but the sensor output remains high when connected, replace the BARO sensor and retest.
  8. If problem persists after sensor and wiring replacement, investigate ECM input circuit or replace/repair ECM per manufacturer procedure.
  9. Clear codes and road test to confirm repair. Re-scan for recurrence and verify live BARO readings are within expected range.

Likely causes

  • Corroded or damaged sensor connector causing a voltage leak
  • Short between sensor signal wire and 5V reference wire
  • Failed BARO sensor element producing a high voltage
  • Open/weak ground at sensor or engine control module

Fault status

⚠️ Status
Barometric Pressure Sensor A Circuit High — ECM detected a higher-than-expected voltage on the BARO sensor A circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0108 P0118 P0191 P2226 P2230
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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Code

P2229

MITSUBISHI P — Powertrain

Barometric pressure sensor high

Brand: MITSUBISHI
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Shorted wiring to 5V reference or another power source
  • Failed/barometric pressure sensor producing excessive output
  • Poor or missing ground at sensor or ECM
  • Short to battery voltage or another sensor circuit
  • Corroded/damaged connector or wiring harness
  • Intermittent/failed ECM input circuit

Symptoms

  • Check Engine Light (MIL) illuminated
  • Reduced engine performance, poor drivability or rough idle (depending on vehicle strategy)
  • Long crank or hard starting in some conditions
  • Stored diagnostic trouble code P2229 and possible related codes

What to check

  • Scan for current and pending codes; record freeze frame and live data (BARO sensor voltage/pressure)
  • Visually inspect the BARO sensor, connector and wiring for damage, corrosion or pin push-out
  • Backprobe the sensor connector with key ON (engine OFF) to check reference voltage, ground and signal voltage
  • Compare BARO sensor value to ambient pressure or MAP sensor reading (if available) in live data
  • Wiggle harness while observing live data to find intermittent faults

Signal parameters

  • Sensor type: typically an analog voltage output (0.5–4.5 V typical range depending on design)
  • Reference supply: stable 5V reference from ECM (verify presence at sensor connector)
  • Ground: good chassis/ECM ground required for accurate signal
  • Expected behavior: signal varies with ambient pressure; should not be stuck at a high voltage or equal to reference voltage

Diagnostic algorithm

  1. Retrieve and save codes and freeze-frame data. Note related codes and engine conditions.
  2. Inspect the BARO sensor, connector and wiring for contamination, damage, or corrosion. Repair physical damage.
  3. With key ON (engine OFF), backprobe connector: verify 5V reference and good ground at the sensor harness pins.
  4. Measure sensor output voltage at the signal pin. If output is higher than expected (near 5V), proceed.
  5. Disconnect the sensor: re-check the signal circuit voltage at the harness. If voltage remains high with sensor disconnected, suspect a short to 5V or power source in the wiring or ECM.
  6. Perform continuity checks from sensor signal pin to ECM input pin and check for shorts to battery + and to reference 5V using an ohmmeter. Repair wiring as needed.
  7. If wiring and connector are good but the sensor output remains high when connected, replace the BARO sensor and retest.
  8. If problem persists after sensor and wiring replacement, investigate ECM input circuit or replace/repair ECM per manufacturer procedure.
  9. Clear codes and road test to confirm repair. Re-scan for recurrence and verify live BARO readings are within expected range.

Likely causes

  • Corroded or damaged sensor connector causing a voltage leak
  • Short between sensor signal wire and 5V reference wire
  • Failed BARO sensor element producing a high voltage
  • Open/weak ground at sensor or engine control module

Fault status

⚠️ Status
Barometric Pressure Sensor A Circuit High — ECM detected a higher-than-expected voltage on the BARO sensor A circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0108 P0118 P0191 P2226 P2230
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MITSUBISHI

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
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