What Does P011D Mean?
The ECM has detected that the charge air temperature on bank 2 does not correlate with the intake air temperature within the expected tolerance. This applies to V-configuration turbocharged engines with separate intercooler paths for each bank. One sensor is reading inaccurately, or there is a genuine cooling imbalance in the bank 2 intercooler circuit causing the temperature mismatch.
Common Causes
35%
Faulty bank 2 charge air temperature sensor with drifted or failed thermistor element
25%
Bank 2 intercooler obstruction or damage causing reduced cooling effectiveness compared to bank 1
20%
Boost leak in bank 2 charge air piping allowing hot compressed air to bypass intercooler cooling
20%
Wiring or connector fault on bank 2 CAT sensor circuit causing incorrect signal to ECM
Diagnostic Steps
1
Compare bank 1 and bank 2 charge air temperature readings plus IAT on a scan tool at cold soak. All three should be within a few degrees of ambient temperature.
2
Inspect the bank 2 intercooler for external blockage, bent fins, or physical damage. Compare visually with bank 1 intercooler condition.
3
Disconnect the bank 2 charge air temperature sensor and measure resistance. Verify against manufacturer specifications for the current temperature. Replace if out of range.
4
Check all bank 2 charge air piping, couplers, and clamps for leaks. Perform a pressurized boost leak test on the bank 2 charge air path separately.
5
Inspect the wiring harness for the bank 2 CAT sensor from connector to ECM for chafing, heat damage from turbo proximity, or damaged insulation.
Estimated Repair Cost
$100 - $600
Parts + labor, varies by vehicle and location
The ECM has detected that the charge air temperature on bank 2 does not correlate with the intake air temperature within the expected tolerance. This applies to V-configuration turbocharged engines with separate intercooler paths for each bank. One sensor is reading inaccurately, or there is a genui...
The most common cause of P011D (Charge Air Temperature/Intake Air Temperature Correlation Bank 2) is: Faulty bank 2 charge air temperature sensor with drifted or failed thermistor element
Typical repair costs for P011D range from $100 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Inaccurate bank 2 charge air temperature readings may cause asymmetric fueling between banks, leading to detonation risk on bank 2 cylinders under high boost conditions. This can result in catastrophic engine damage if not addressed.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P011D to identify the root cause.
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Quick Info
Category
Powertrain
System
Turbocharger & Charge Air Cooling System
Difficulty
Type
Generic (SAE)
Recommended Tools
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