DTC Advanced Diagnostics: P2261
DTC P2261:Turbocharger Bypass Control Valve Stuck Closed

General Description

The turbocharger bypass control solenoid valve is monitored against plausibility error. This check detects turbocharger boost sensor signal with oscillations in order to recognize turbocharger bypass control solenoid valve which does not open. If the turbocharger boost sensor is a specified value, the powertrain control module (PCM) detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Continuous
Sequence
None
Duration
0.5 second or more
DTC Type
Two drive cycles, MIL on

Enable Conditions
Condition
Minimum
Maximum
Intake air temperature [IAT Sensor 1]
58.99 °F (14.99 °C)
–
Pressure ratio turbocharger boost sensor to mass airflow (MAF) sensor
1.02 - 3.04
–
Other
Turbocharger bypass control solenoid valve must be surely opened
No high load requested
[ ]: HDS Parameter

Malfunction Threshold
The pressure oscillations are counted if the pressure of the turbocharger boost sensor is greater than 2 kPa (15.1 mmHg, 0.6 inHg), or less than -2 kPa (-15.1 mmHg, -0.6 inHg). If the counter reaches 7 counts within 0.75 second, the PCM stores a DTC.

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
Turbocharger bypass control solenoid valve failure

Confirmation Procedure
Operating Condition
Start the engine. Hold the engine speed [Engine Speed] at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle.

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.