Code
P2EB1
Generic
P — Powertrain
Throttle Valve Intake Air Pressure Sensor Circuit Low
Views:
UK: 18
EN: 19
RU: 14
AI status
Completed
Completed
100%
Causes
- Damaged wiring (short to ground, chafing, broken conductor)
- Corroded/loose sensor connector or pins
- Failed intake air pressure sensor (MAP-style sensor located near throttle)
- Bad sensor ground or reference voltage (low or missing 5V reference)
- Aftermarket or poor repair connector, water intrusion
- ECM input circuit fault (rare)
Symptoms
- Check Engine Light (MIL) illumination
- Reduced engine performance or entering limp mode
- Rough idle, stalling, or hesitation on acceleration
- Poor fuel economy or increased emissions
- Difficulty starting in some conditions
What to check
- Retrieve freeze frame and related codes with a scan tool; note engine conditions when code set
- Visual inspection of sensor, connector, and wiring for damage, corrosion, or pin push-out
- Backprobe sensor connector and check for proper reference voltage (typically 5V) and a solid ground
- Measure sensor signal voltage with key ON and engine running; compare to expected range
- Wiggle test wiring while observing live data for intermittent changes
- Check for water intrusion or contamination at the sensor/connector
Signal parameters
- Sensor reference voltage: typically ~5.0 V (key ON)
- Sensor ground: near 0 V with engine connected
- Sensor signal voltage range: typically ~0.5–4.5 V depending on pressure (low reading indicates
- Low-circuit threshold: signal near 0 V or below manufacturer-specified minimum
- Resistance: if specified, sensor internal resistance should match service data (varies by design)
Diagnostic algorithm
- Read and record DTC P2EB1 and any related codes (P0107/P0108/P0106 etc.). Note freeze-frame data. 2) Perform a visual inspection of the intake pressure sensor, harness, and connector for damage, corrosion, or contamination. Repair or clean as needed. 3) With the connector attached, backprobe the sensor pins. Verify reference voltage (≈5 V) and ground integrity (near 0 V). 4) Check sensor signal voltage with key ON and engine running. A healthy sensor will produce a voltage within the expected range — a very low voltage (≈0 V to
Likely causes
- Short to ground on the sensor signal wire
- Corroded/loose connector at the sensor
- Failed sensor element
- Poor ground or missing 5V reference to the sensor
Fault status
Status
Circuit Low — sensor signal voltage below manufacturer minimum. Code may be stored as pending or confirmed and will typically illuminate MIL and may trigger limp mode until corrected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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