P011D

Charge Air Temperature/Intake Air Temperature Correlation Bank 2

P011D is a generic OBD-II powertrain diagnostic trouble code: Charge Air Temperature/Intake Air Temperature Correlation Bank 2. It is logged by the engine control unit when the powertrain monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.

Code
P011D
Group
Powertrain
System
Powertrain
Severity
Warning (MIL on)
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What P011D means

P011D is the bank 2 counterpart to P011C. It is stored when the PCM detects an excessive difference between the charge air temperature (CAT) sensor and the intake air temperature (IAT) sensor readings on bank 2 — the engine bank that does not contain cylinder number one. As with P011C, this code only applies to turbocharged or supercharged engines fitted with multiple air inlets. The charge air cooler removes heat added during turbocharger compression, and both sensors should report temperatures that correlate within the PCM's programmed tolerance. A fault in either sensor, a wiring issue, or an intercooler restriction on the bank 2 side can cause the readings to diverge beyond that limit, triggering the code and illuminating the MIL. Fuel delivery and ignition timing decisions are based on accurate air-charge data, so an unresolved P011D can lead to degraded performance, higher emissions, and in severe cases, inappropriate fuelling under heavy load. On V-configuration and flat engines both banks have separate induction paths, making per-bank correlation codes meaningful and distinct.

Common causes

Most-frequently reported root causes when P011D is logged.

  • 1
    Defective charge air temperature sensor on the bank 2 side of the intercooler
  • 2
    Faulty IAT sensor serving the bank 2 intake path
  • 3
    Corroded, shorted, or open-circuit wiring in the bank 2 CAT or IAT sensor harness
  • 4
    Intercooler restriction or heat-soak on the bank 2 charge air cooler reducing cooling efficiency
  • 5
    Air leak in the bank 2 charge air ducting between the turbocharger and intake manifold
  • 6
    Contaminated or mechanically damaged thermistor element in either sensor
  • 7
    Rare PCM fault causing incorrect correlation threshold calculation

Symptoms drivers notice

Check engine / MIL light on
Reduced power output, particularly under turbo boost on the bank 2 cylinder group
Increased fuel consumption resulting from skewed air-charge calculations
Hesitation or stumble under load or during acceleration
Potential rough idle if the PCM applies a significant fuel trim correction

How to diagnose P011D

A typical diagnostic flow when this code is present.

  1. 1
    Scan for all stored codes and freeze-frame data; note any related bank 2 or boost system codes that may point to a common root cause
  2. 2
    Visually inspect the bank 2 intercooler, charge piping, and intake ducting for blockage, cracks, or loose connections
  3. 3
    Inspect the CAT and IAT sensor connectors and wiring on the bank 2 side for corrosion, chafing, or moisture damage
  4. 4
    Disconnect each sensor and measure resistance with a multimeter at ambient temperature, comparing to OEM specifications for the thermistor curve
  5. 5
    Monitor live sensor data with an OBD-II scanner at key-on / engine-off to verify both sensors read within a few degrees of ambient and of each other
  6. 6
    Apply controlled heat to each sensor individually and observe the scan tool reading to confirm smooth, expected resistance change
  7. 7
    Replace the faulty sensor or repair wiring, clear codes, and verify with a complete drive cycle

Related powertrain codes

Frequently asked questions

What vehicles most commonly trigger P011D?

V6 and V8 turbocharged engines with twin intercoolers and per-bank induction systems, such as those found in some Nissan, Infiniti, and European performance vehicles.

Will P011D cause limp mode?

Not typically on its own. P011D usually illuminates the MIL and affects fuel trim without triggering a full limp mode, unless combined with additional boost or sensor faults.

How do I tell if the intercooler is the problem rather than the sensor?

If both sensors test within spec individually but the temperature spread is large and persistent under boost, the intercooler efficiency or a charge air leak is the more likely cause.

Can I clear P011D without replacing anything?

You can clear it, but if the underlying fault persists the code will return. Always diagnose and address the root cause before clearing.

Disabling P011D in software

RaceTune can permanently disable P011D — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.

Permanent
The monitor is disabled in the ECU itself — not just cleared. It cannot return.
Tailored to your file
Each patch is matched to your specific software version — never a one-size-fits-all file.
Reversible
The original file is always preserved. Reflash the stock to return the ECU to factory state.

Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.

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