P007C

Code

Generic P — Powertrain

Charge Air Cooler Temperature Sensor Circuit Low Bank 1

Brand: Generic

Type: P — Powertrain

Views: UK: 16 EN: 29 RU: 19

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Damaged or shorted sensor wiring (short to ground)
Open circuit in sensor wiring or connector (broken wire, corroded terminal)
Failed charge air cooler temperature (CACT/IC) sensor (shorted or out of spec)
Poor connector pin contact, corrosion, or bent pins
Faulty ground or reference voltage at ECU or sensor
ECU input circuit fault (rare)

Symptoms

Check engine light (MIL) illuminated
Poor cold-start drivability or unexpected fuel/boost behavior if ECU uses CACT for control
Fault codes related to intake/air temperature or turbo control
Reduced performance or limp mode if ECU limits boost based on missing sensor data (vehicle-dependent)
Visible corrosion or damage at intercooler sensor connector (possible)

What to check

Retrieve P007C and any related freeze-frame data and stored codes (look for related intake temp or boost control codes)
Visually inspect intercooler/charge-air cooler sensor and connector for corrosion, damage, water ingress or loose pins
Inspect wiring along harness for chafing, pinches, heat damage, recent repairs or splices
Check for aftermarket parts or previous repair areas near the intercooler
Measure connector voltage, ground and signal with key ON and engine OFF and with engine running where specified

Signal parameters

Sensor type: typically an NTC thermistor (resistance decreases as temperature rises)
Reference voltage: usually a regulated 5.0 V or ECU internal pull-up (verify factory spec)
Expected signal voltage: approx. 0.1 V (very cold/short/high resistance to ground) up to ~4.8 V (very hot/open to Vref) — verify exact values from factory data
Expected resistance behavior: high resistance at low temperatures and lower resistance at higher temperatures (check manufacturer resistance vs temperature chart)
ECU input expects a smoothly varying voltage with temperature change (no abrupt jumps or open-circuit conditions)

Diagnostic algorithm

Record freeze-frame data and note any related codes (intake air temp, MAP, boost controls).
Perform a visual inspection of the CACT sensor, connector and harness; repair visible damage or corrosion.
With ignition ON (engine OFF) backprobe sensor connector: verify reference voltage (Vref) present and proper, and a good ground. If no Vref, diagnose supply circuit or ECU output.
Measure sensor signal voltage while manipulating the intercooler temperature (blow air on sensor, warm with heat gun while avoiding damage). Voltage should change smoothly as temperature changes. If signal stays low/near ground, suspect short to ground or failed sensor.
Unplug sensor and measure resistance across sensor terminals. Compare to manufacturer resistance vs temperature chart. If resistance is near 0 ohms (short) or infinite (open) or out of spec, replace sensor.
Check continuity between sensor signal wire and ECU input; look for short to ground or short to Vref. Repair any short/open in harness. Use insulated piercing probe if necessary.
If wiring and sensor check good, check ECU input circuit: measure resistance to ground and for proper pull-up behavior. If ECU input is faulty, consult manufacturer technical service information before replacing ECU.
After repairs, clear codes and perform test drive. Recheck for return of DTC and verify proper sensor operation using live data (voltage/temperature) and freeze-frame comparisons.

Likely causes

Open/shorted harness between sensor and ECU
Corroded or loose connector at sensor or harness splice
Failed CACT (intercooler temperature) sensor
Short to ground in sensor signal wire

Fault status

⚠️ Status

Charge Air Cooler Temperature Sensor Circuit Low — sensor signal voltage or resistance lower than expected (possible short to ground, open circuit, or failed sensor).

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-1.5 hours

Similar codes

Your experience will help others

+100 karma for a short comment :)

Was this AI description helpful?

Your feedback helps improve AI descriptions.

👍 Like 0 👎 Dislike 0

Send to email