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Home / DTC / P1244 — Range / sensor performance of altitude compensation

P1244 — Range / sensor performance of altitude compensation

Detailed page for trouble code P1244.

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P1244

LAND ROVER P — Powertrain

Range / sensor performance of altitude compensation

Brand: LAND ROVER
Type: P — Powertrain
Views: UK: 4 EN: 5 RU: 6
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Page language: EN

Causes

  • Faulty barometric (BARO) or ambient pressure sensor
  • Faulty manifold absolute pressure (MAP) sensor or sensor cross-check failure
  • Damaged wiring or poor connector connection to the sensor
  • Intake vacuum/leak or intercooler/turbo leak (affecting pressure readings)
  • ECU software, calibration, or internal fault
  • Recent rapid or extreme altitude change without adaptation

Symptoms

  • Check Engine (MIL) illuminated
  • Erratic idle, hesitation, or rough running
  • Reduced engine power or limp mode (on some vehicles)
  • Poor fuel economy or increased emissions
  • Hard starting or noticeable changes when driving at different altitudes

What to check

  • Read and record freeze frame data and live BARO/MAP/IAT readings with a scan tool
  • Verify the code history and any related codes (MAP, IAT, fuel trim codes)
  • Visual inspection of sensor(s), vacuum hoses, intake system, and connectors
  • Measure sensor supply voltage, reference signal and ground at the connector
  • Compare BARO sensor value (key ON engine OFF) to local ambient pressure (weather station or calibrated gauge)
  • Check for software updates or Technical Service Bulletins (TSBs) from Land Rover

Signal parameters

  • BARO (ambient) expected: roughly ambient atmospheric pressure — ~80–105 kPa depending on altitude (verify against local ambient reading)
  • MAP at key ON engine OFF should approximate BARO (ambient pressure)
  • Typical sensor signal voltage range: ~0.5–4.5 V (varies by sensor design) — check OEM spec for exact voltages
  • MAP under vacuum/load will be lower than BARO; compare live MAP vs BARO for reasonable correlation during key-on and engine running
  • Fuel trim/long-term short-term trims will change if BARO/MAP inputs are incorrect — monitor for abnormal corrections

Diagnostic algorithm

  1. Use a scanner to record freeze frame values, live BARO and MAP readings, and other related PIDs. Note vehicle altitude if available.
  2. Verify vehicle history and any related codes (e.g., P0106, P0107, P0108). Clear codes and see if P1244 returns.
  3. Visually inspect BARO/MAP sensor(s), wiring harnesses and connectors for damage, corrosion, or water ingress. Repair any visible faults.
  4. With key ON engine OFF, measure sensor supply (5 V or 3.3 V depending on vehicle), ground continuity and signal voltage at the sensor connector. Compare to OEM spec.
  5. Compare BARO sensor pressure reading to a reliable ambient pressure source (local weather station or calibrated pressure gauge). Values should be close; large deviations indicate sensor or wiring fault.
  6. Start engine and observe MAP vs BARO: MAP should vary with engine load but remain consistent and show expected relationship to BARO. Large discrepancies suggest sensor or intake leak.
  7. Perform a smoke test or use propane/isopropyl near intake to check for vacuum/leaks that could affect readings. Repair leaks and retest.
  8. If wiring and intake check OK, substitute a known-good sensor or bench-test the suspect sensor per OEM procedure. Replace sensor if it fails tests.
  9. If sensor and wiring test good, check for ECU software updates or consult Land Rover technical info for calibration procedures. Reflash or update ECU if required.
  10. After repairs, clear codes and perform a road test including uphill/downhill or altitude-change conditions where possible. Confirm code does not return and drivability is restored.

Likely causes

  • Corroded or loose connector at the BARO/MAP sensor
  • Short to ground or open in sensor power/ground/reference circuit
  • Contaminated or failed BARO sensor element
  • Intake leak between sensor reference point and intake manifold
  • Unapplied software update or incorrect calibration in ECU

Fault status

⚠️ Status
Range/performance fault detected in the altitude (barometric/ambient pressure) compensation system. The measured pressure signal is out of expected range or inconsistent with other sensors.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

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P0106 P0107 P0108 P0113 P0118 P0191
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