The OBD2 code P007C is related to the “Charge Air Cooler Temperature Sensor Circuit Low,” indicating that the sensor monitoring the temperature of the air entering the engine after being cooled by the charge air cooler (intercooler) is sending a lower than expected signal to the vehicle’s powertrain control module (PCM).
This can lead to various performance issues, such as poor engine performance or decreased fuel economy, as it affects the engine’s ability to manage air intake efficiently.
P007C quick overview
| Meaning | P007C: Charge Air Cooler Temperature Sensor Circuit Low |
| Is it serious? | Yes, this issue can impact engine performance and fuel efficiency. |
| Possible causes | – Faulty charge air cooler temperature sensor – Damaged or corroded wiring and connectors – Poor ground connection to the PCM – Issues with the PCM itself |
| How to diagnose? | Visually inspect the charge air cooler and ducting for damage or restrictions. Check for TSBs that might address this issue specifically. Test the sensor resistance and verify the reference voltage from the PCM. Ensure a solid ground connection to the PCM. |
P007C Meaning
When your car’s computer throws a P007C code, it’s essentially saying that it’s not getting the right information about the air temperature after it passes through the intercooler, which cools down the air before it goes into the engine. This is important because the temperature of the air can affect how well your engine runs.
Think of it like trying to run when you’re overheated; you won’t perform as well. The problem could be a bad sensor, a wiring issue, or even just a bad connection. Fixing it means making sure the sensor and its connections are in good shape, ensuring your engine gets the right mix of air for the best performance.
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How to fix P007C – learn from mechanics
I looked into P007C service cases at iatn.com website where in the private forums the mechanics seek advice from other mechanics. I looked up a bunch of cases to help you decide how to fix your issue and see what would a real mechanic do to solve it.
Case #1: Chevrolet P007C
Vehicle information
Chevrolet Silverado, 2018, 6.6L engine
Issue + repair history
- Check engine light on
- Replaced charge air cooler temperature sensor
- Inspected wiring for damage
- Vehicle experiencing poor engine performance
Other OBD2 Codes + Test Results
- P007C: Charge Air Cooler Temperature Sensor Circuit Low
- No additional codes present
- Live data shows low temperature reading from the sensor
Mechanic suggestions
- Visually inspect charge air cooler and ducting for any damage or restrictions
- Check for technical service bulletins (TSBs) related to this issue
- Test the sensor resistance and verify reference voltage from PCM
- Check ground connection to PCM
Final fix
Discovered a damaged ground wire leading to the PCM. Repaired the wire and cleared codes, issue resolved.
Case #2: Ford P007C
Vehicle information
Ford F-150, 2019, 3.5L engine
Issue + repair history
- Check engine light illuminated
- Replaced charge air cooler temperature sensor
- Inspected wiring harness for any issues
- Vehicle experiencing decreased fuel economy
Other OBD2 Codes + Test Results
- P007C: Charge Air Cooler Temperature Sensor Circuit Low
- No other codes detected
- Live data shows consistent low voltage signal
Mechanic suggestions
- Check for any signs of wiring damage or corrosion
- Perform circuit testing using a digital multimeter
- Verify proper resistance and voltage at the sensor
- Ensure PCM ground connection is secure
Final fix
Identified a loose ground connection at the PCM. Tightened the connection and cleared codes, issue resolved.
Case #3: Toyota P007C
Vehicle information
Toyota Tacoma, 2017, 3.5L engine
Issue + repair history
- Check engine light on intermittently
- Replaced charge air cooler temperature sensor
- Examined wiring harness for any visible damage
- Vehicle stuck in “limp” mode occasionally
Other OBD2 Codes + Test Results
- P007C: Charge Air Cooler Temperature Sensor Circuit Low
- No additional fault codes
- Live data shows low sensor signal
Mechanic suggestions
- Conduct thorough visual inspection of wiring and connectors
- Follow diagnostic flow chart for step-by-step testing
- Test resistance and voltage at the sensor
- Ensure proper ground connection to PCM
Final fix
Found a corroded wire causing poor connection at the charge air cooler temperature sensor. Repaired the wire and cleared codes, issue resolved.
How to diagnose P007C
I made you an overview of solving this DTC, based on all the advice that was suggested by certified mechanics to address this issue in previously mentioned service cases.
| Diagnostic Step | Brief Explanation |
|---|---|
| Inspect charge air cooler and ducting | Check for physical damage or blockages that could affect air flow. |
| Check for TSBs | Look for manufacturer recommendations on this specific issue. |
| Test sensor resistance and PCM voltage | Measure to ensure the sensor and PCM are communicating correctly. |
| Check ground connection to PCM | Verify the PCM is properly grounded for accurate sensor operation. |
| Inspect wiring and connectors | Look for any signs of damage, wear, or corrosion that could disrupt signals. |
| Perform circuit testing | Use a multimeter to test the electrical circuit for faults. |
| Ensure proper resistance and voltage | Confirm the sensor is receiving and sending the correct signals. |
| Secure loose connections | Tighten or repair any loose connections to prevent signal loss. |
| Repair or replace damaged wires | Fix any damaged wiring to restore proper electrical function. |
Car Diagnostics Training
- Car Electrical basics
- OBD-II scanner basics
- How to use an OBD reader
- Introduction to a Bi-directional Scan tool
- OBD scanner buyer’s guide + discounts
Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)