What Does P011C Mean?
The ECM has detected that the charge air temperature (intercooler outlet temperature) on bank 1 does not correlate with the intake air temperature sensor within the expected range. This code applies to turbocharged or supercharged vehicles where a dedicated charge air temperature sensor monitors intercooler effectiveness. A mismatch suggests one sensor is faulty or the intercooler is not performing correctly.
Common Causes
35%
Faulty charge air temperature sensor on bank 1 intercooler outlet reading inaccurately
25%
Restricted or damaged intercooler reducing cooling efficiency, causing genuinely elevated charge air temperatures
20%
Wiring or connector issue on the charge air temperature sensor circuit introducing signal error
20%
Boost leak between turbocharger and intercooler allowing unmeasured hot air to bypass the intercooler
Diagnostic Steps
1
Compare charge air temperature and IAT sensor readings on a scan tool with engine cold. Both should read near ambient. If the charge air temp sensor reads significantly different, it is likely faulty.
2
Inspect the intercooler core for external blockage (debris, bugs, mud) and internal contamination (oil from turbo seals). A restricted intercooler will show high charge air temps under boost.
3
Check all charge air piping between turbo outlet, intercooler, and throttle body for loose clamps, cracked hoses, or popped couplers that allow boost leaks.
4
Disconnect the charge air temperature sensor and measure resistance. Compare to the manufacturer's specification chart. Replace if out of tolerance.
5
Perform a boost leak test using a shop air adapter at the throttle body inlet. Pressurize to 15-20 PSI and listen/feel for leaks throughout the intercooler system.
Estimated Repair Cost
$100 - $600
Parts + labor, varies by vehicle and location
The ECM has detected that the charge air temperature (intercooler outlet temperature) on bank 1 does not correlate with the intake air temperature sensor within the expected range. This code applies to turbocharged or supercharged vehicles where a dedicated charge air temperature sensor monitors int...
The most common cause of P011C (Charge Air Temperature/Intake Air Temperature Correlation Bank 1) is: Faulty charge air temperature sensor on bank 1 intercooler outlet reading inaccurately
Typical repair costs for P011C range from $100 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Incorrect charge air temperature data can cause the ECM to miscalculate air density, leading to improper fuel metering that may cause detonation under boost. Sustained detonation can cause piston or rod bearing failure.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P011C to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Turbocharger & Charge Air Cooling System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
