P00E0

Turbocharger/Supercharger Boost Control C Performance

P00E0 is a generic OBD-II powertrain diagnostic trouble code: Turbocharger/Supercharger Boost Control C Performance. 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
P00E0
Group
Powertrain
System
Powertrain
Severity
Warning (MIL on)
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What P00E0 means

DTC P00E0 indicates that the engine control module has detected a low voltage or out-of-range low signal from the Charge Air Cooler (CAC) Coolant Temperature Sensor A. This sensor is found on turbocharged or supercharged engines that use a liquid-cooled (water-to-air) intercooler system. The sensor is a thermistor whose resistance changes with the temperature of the coolant circulating through the charge air cooler, allowing the ECM to monitor how effectively intake air is being cooled before it enters the cylinders.

The sensor typically returns a voltage that rises as temperature falls and drops as temperature rises. A circuit low fault is set when the ECM reads a signal voltage below the calibrated minimum, which most often corresponds to a short to ground in the signal wire, an internally failed sensor, or a connector fault that pulls the signal line low. Because the reading feeds charge-air temperature compensation, an implausible low value can skew fuelling and boost limiting strategies.

Diagnosis should begin by reading live data to see the reported CAC coolant temperature and comparing it against a known reference. Technicians should then verify the sensor supply and ground, and check the signal wire for a short to ground before replacing the sensor. Confirming the coolant circuit is filled and circulating is also worthwhile, since sensor readings depend on real coolant flow.

Common causes

Most-frequently reported root causes when P00E0 is logged.

  • 1
    Short to ground in the charge air cooler coolant temperature sensor A signal wire.
  • 2
    Internally failed sensor with output stuck at the low end of its range.
  • 3
    Corroded or water-contaminated sensor connector creating a low-resistance path.
  • 4
    Chafed harness grounding the signal wire against the engine or chassis.
  • 5
    Open sensor reference or supply causing an implausible low reading.
  • 6
    Coolant contamination or intrusion into the sensor connector.
  • 7
    Rarely, an ECM input fault after all external causes are excluded.

Symptoms drivers notice

Malfunction indicator lamp illuminated with P00E0 stored.
Scan tool shows charge air cooler coolant temperature reading implausibly low.
Possible reduced boost or conservative fuelling as the ECM compensates.
Slight loss of performance under load in some calibrations.
Often no obvious drivability symptom apart from the warning lamp.

How to diagnose P00E0

A typical diagnostic flow when this code is present.

  1. 1
    Retrieve all stored DTCs and freeze frame data before clearing anything.
  2. 2
    View live data for the charge air cooler coolant temperature and compare it with ambient and engine coolant readings.
  3. 3
    Inspect the sensor connector and harness for corrosion, coolant intrusion, or damaged insulation.
  4. 4
    With the sensor disconnected, check whether the signal reading changes as expected to isolate sensor versus wiring.
  5. 5
    Measure the signal wire for a short to ground with the sensor unplugged.
  6. 6
    Verify sensor supply and ground integrity at the connector.
  7. 7
    Replace the sensor only after wiring and connections test good.

Related powertrain codes

Frequently asked questions

What system does P00E0 relate to?

It relates to the charge air cooler coolant temperature sensor on liquid-cooled intercooler systems, not to a turbocharger boost control actuator.

Does circuit low mean the sensor has failed?

Not necessarily. A short to ground in the wiring or a bad connector can produce the same low reading, so the wiring must be checked before replacing the sensor.

Is it safe to drive with P00E0?

It is usually drivable, but the ECM may run conservative fuelling or boost, and the fault should be repaired to restore correct charge-air temperature compensation.

Can low coolant cause this code?

A drained or air-locked charge air cooler coolant circuit can affect readings, so verifying the coolant loop is full and circulating is a sensible early check.

Disabling P00E0 in software

RaceTune can permanently disable P00E0 — 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.

ECU families we can disable P00E0 on

We hold the DaVinci A2L disable definitions for these families, so the exact P00E0 path and mask addresses are mapped. verified marks a confirmed disable definition. We support many more — upload your file and our identifier will match it automatically.

  • Bosch EDC17C66 verified
  • Bosch EDC17CP57 verified
  • Bosch MG1CP002 verified

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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