Code
DF200
RENAULT
D
-> P2226 - Atmospheric pressure sensor
Views:
UK: 3
EN: 8
RU: 6
AI status
Completed
Completed
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Causes
- Faulty atmospheric/barometric pressure sensor (internal failure or contamination)
- Damaged, corroded or loose sensor connector
- Open, shorted or high-resistance wiring between sensor and ECU
- Incorrect or missing reference voltage or ground to sensor
- Intake system leaks or blocked sensor port giving incorrect readings
- Intermittent CAN/bus communication or ECU software issue
Symptoms
- Check Engine MIL illuminated (DF200 / P2226 stored)
- Reduced engine performance or limp mode in some conditions
- Poor idle, hesitation or incorrect air/fuel mixture
- Erratic boost control on turbocharged engines
- Inconsistent barometric pressure / MAP readings in live data
What to check
- Read/record DTCs and freeze-frame data; clear code and see if it returns
- Compare barometric/atmospheric pressure reading in live data to local ambient pressure (weather or handheld barometer)
- Inspect sensor connector and wiring visually for damage, corrosion, loose pins
- Backprobe sensor: verify reference voltage (typically 5V or vehicle-specific), ground continuity and signal voltage
- Check for intake leaks or blocked sensor port
- Scan for related MAP, boost or fuel system codes and compare signals
Signal parameters
- Typical ambient pressure range: ~950–1050 hPa (mbar) at sea level — value should be close to local barometric pressure
- Common analog sensor signal: about 0.5–4.5 V proportional to pressure (vehicle-specific — consult data)
- Reference supply usually 5 V (or vehicle-specific); signal should not be stuck at 0 V or battery voltage
- Digital sensors may use CAN/I2C/SPI — confirm expected message and values with OEM scan tool
Diagnostic algorithm
- Use OEM or capable scan tool: record DF200/P2226 and related codes, note freeze-frame, and view live barometric pressure/MAP values.
- Verify ambient pressure reading against local barometer or weather station. If reading is plausible, suspect intermittent/communication issue rather than gross sensor failure.
- Perform visual inspection of sensor and wiring; repair any obvious damage or corrosion.
- Backprobe sensor connector: confirm correct reference voltage and good ground with ignition ON. If reference missing, trace feed (fuse, wiring, ECU).
- Measure sensor signal voltage while changing ambient conditions (if safe) or compare to MAP sensor with engine off (baro should match MAP at equilibrium).
- Check continuity between sensor ground and chassis ground; check for short to battery voltage on signal wire.
- If wiring and supply are good but signal is out of range or unstable, replace the atmospheric/baro sensor and retest.
- If new sensor does not clear the code, inspect ECU inputs and CAN bus, check for software updates, and consider ECU diagnostics by a specialist.
Likely causes
- Sensor has failed or is out of calibration
- Connector pins corroded or pushed out
- Wire chafed and shorting to ground/power
- Sensor supply (reference) not present or low (fuse, wiring, ECU)
- Sensor port contaminated with oil/debris causing wrong pressure reading
Fault status
Status
DF200 -> P2226: Atmospheric (barometric) pressure sensor circuit range/performance. Check sensor, connector/wiring, and ECU inputs.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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