Code
P007A
LAND ROVER
P — Powertrain
air charge cooler circuit temperature sensor - Bank 1
Views:
UK: 9
EN: 19
RU: 16
AI status
Completed
Completed
100%
Causes
- Open or short in sensor wiring or connector
- Corroded, loose or damaged sensor connector
- Failed or water‑damaged intercooler/charge air temperature sensor
- Poor ground or reference voltage at ECM
- Intermittent harness damage (chafing, pinched wires)
- Recent repairs or modifications to intake/charge system
Symptoms
- Check Engine Light (MIL) illuminated
- Stored P007A diagnostic trouble code(s)
- Reduced turbo/boost control or derate in some drive conditions
- Poor cold‑start behavior or incorrect air temperature compensation
- Possible increased fuel consumption or rough running if ECU uses the signal for fueling/boost control
What to check
- Read and record freeze frame and live data with a scan tool (charge air cooler temp, related temps, and fuel/boost trims)
- Visual inspection of sensor, connector and harness for corrosion, damage, or water ingress
- Backprobe the sensor connector and check reference voltage, signal voltage and ground with ignition ON
- Measure sensor resistance at known ambient temperatures and compare with service data
- Wiggle test harness while monitoring live data for intermittent changes
- Check for related codes (ECM, MAF, MAP, coolant temp) and good grounds/power supplies
Signal parameters
- Sensor type: typically an NTC thermistor mounted in charge air cooler or intake pipe (resistance varies with temperature)
- Expected signal behavior: resistance decreases as temperature rises (NTC)
- Typical signal voltage range: approximately 0.1–4.9 V depending on temp and circuit (varies by model — consult service data)
- Open-circuit: very high resistance / signal voltage may show reference or fault; short-circuit: near 0 Ω or near reference ground voltage
- ECM monitors plausibility (compared to intake/coolant/ambient sensors) and flags deviations
Diagnostic algorithm
- Verify P007A with a scan tool. Record freeze-frame and live data (charge air cooler temp, intake air temp, coolant temp, boost pressure).
- Visually inspect sensor location, connector and wiring for corrosion, damage, oil or water contamination. Repair any obvious damage.
- With ignition ON (engine OFF), backprobe connector: verify reference voltage and ground at the sensor connector per service manual. Note signal voltage.
- Measure sensor resistance at ambient and compare to manufacturer specification (or check that resistance changes sensibly when warmed/cooled).
- If resistance/voltage readings are out of range (open/short), disconnect harness and check continuity to ECM pin. Repair broken wire or poor connector.
- If wiring and connectors are good but readings are out of spec, replace the charge air cooler temperature sensor and retest.
- After repair, clear codes and perform a test drive / operational check. Re-scan to confirm code does not return.
- If sensor and wiring test good but code persists, inspect ECM ground distribution and consider ECM input circuit diagnosis or software update per dealer procedures.
Likely causes
- Disconnected or corroded connector at the charge‑air cooler temperature sensor
- Broken wire between sensor and engine control module
- Sensor failed (thermistor open or shorted)
- Water intrusion or oil contamination causing intermittent readings
- Bad ground or blown fuse supplying sensor/ECM circuitry
Fault status
Status
Active fault stored when the ECM detects open/short/improbable charge air cooler temperature signal on Bank 1. MIL may be illuminated; code will remain until circuit returns to normal and the fault is verified as cleared by the ECM.
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
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