Dodge Dart Forum banner
1 - 3 of 3 Posts

·
Registered
Joined
·
3 Posts
Discussion Starter · #1 ·
Does anyone have a fix for code P2261? Everything was working fine a week ago until I replaced my spark plugs and now this code showed up but can’t seem to figure it out. I have a 2013 Dodge Dart Rallye 1.4 Turbo
 

·
Administrator
Joined
·
5,730 Posts
28 - DTC-Based Diagnostics / MODULE, Powertrain Control (PCM) / Diagnosis and Testing

P2261-00-TURBOCHARGER BYPASS VALVE - MECHANICAL
Rectangle Slope Font Parallel Diagram

Theory of Operation

When the accelerator is closed suddenly, excessive boost pressure can build up between the Turbocharger and the Throttle Body which can cause damage to the Turbocharger. This can occur because the compressed air created by the Turbocharger has no place to go. This results in compressor surge. The Powertrain Control Module (PCM) detects this pressure increase via input from the Boost Pressure Sensor. The Boost Pressure Sensor operates as a typical three wire sensor. The PCM provides a 5-volt supply and sensor return circuit to the Boost Pressure Sensor and receives a feedback voltage on the signal circuit. The Turbocharger Surge Valve is responsible for venting the boost pressure between the Turbocharger and Throttle Body during sudden deceleration. The Turbocharger Surge Valve is normally spring loaded closed. When the PCM receives an input signal from the Boost Pressure Sensor that the pressure is above a calibrated amount, the PCM grounds the Turbocharger Surge Valve Control circuit which electrically opens the valve and routes the excess pressure between the Turbocharger and the Throttle Body back to the inlet of the Turbocharger, relieving the pressure and preventing compressor surge.

When Monitored and Set Conditions

When Monitored: This diagnostic runs continuously when the following conditions are met:

•With the engine running.
•With the Turbocharger Surge Valve commanded open.
•No DTCs pending for:
◦Turbocharger Surge Valve
◦Wastegate Solenoid
◦Boost Pressure Sensor

Set Conditions:

•A fault is set when the Powertrain Control Module (PCM) detects ten or more surge pulsations

Default Actions:

•The MIL light will illuminate.

Possible Causes

BOOST PRESSURE SENSOR, WIRING, OR RELATED CONNECTORS
TURBOCHARGER SURGE VALVE, WIRING, OR RELATED COMPONENTS

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

1.CHECK FOR AN ACTIVE DTC

NOTE: Diagnose and repair any Turbocharger Surge Valve or the Boost Pressure Sensor DTCs before continuing with this test.

1. Start the engine and allow it to reach normal operating temperature.

2. Test drive the vehicle. It may be necessary to perform several decelerations to duplicate the conditions to set the DTC.

3. With the scan tool, read DTCs and record on the repair order.

Is the DTC active or pending?

Yes

•Go To 2

No

•Perform the INTERMITTENT DTC diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).


2.TURBOCHARGER SURGE VALVE RESTRICTED

1. Visually check the Turbocharger Surge Valve for debris or signs of a restriction.

Were any restrictions found?

Yes

•Perform the appropriate repair.
•Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

No

•Replace the Turbocharger Surge Valve in accordance with the Service Information.
•Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
 
  • Like
Reactions: phillipjfry

·
Registered
Joined
·
3 Posts
Discussion Starter · #3 ·
28 - DTC-Based Diagnostics / MODULE, Powertrain Control (PCM) / Diagnosis and Testing

P2261-00-TURBOCHARGER BYPASS VALVE - MECHANICAL
View attachment 129166
Theory of Operation

When the accelerator is closed suddenly, excessive boost pressure can build up between the Turbocharger and the Throttle Body which can cause damage to the Turbocharger. This can occur because the compressed air created by the Turbocharger has no place to go. This results in compressor surge. The Powertrain Control Module (PCM) detects this pressure increase via input from the Boost Pressure Sensor. The Boost Pressure Sensor operates as a typical three wire sensor. The PCM provides a 5-volt supply and sensor return circuit to the Boost Pressure Sensor and receives a feedback voltage on the signal circuit. The Turbocharger Surge Valve is responsible for venting the boost pressure between the Turbocharger and Throttle Body during sudden deceleration. The Turbocharger Surge Valve is normally spring loaded closed. When the PCM receives an input signal from the Boost Pressure Sensor that the pressure is above a calibrated amount, the PCM grounds the Turbocharger Surge Valve Control circuit which electrically opens the valve and routes the excess pressure between the Turbocharger and the Throttle Body back to the inlet of the Turbocharger, relieving the pressure and preventing compressor surge.

When Monitored and Set Conditions

When Monitored: This diagnostic runs continuously when the following conditions are met:

•With the engine running.
•With the Turbocharger Surge Valve commanded open.
•No DTCs pending for:
◦Turbocharger Surge Valve
◦Wastegate Solenoid
◦Boost Pressure Sensor

Set Conditions:

•A fault is set when the Powertrain Control Module (PCM) detects ten or more surge pulsations

Default Actions:

•The MIL light will illuminate.

Possible Causes

BOOST PRESSURE SENSOR, WIRING, OR RELATED CONNECTORS
TURBOCHARGER SURGE VALVE, WIRING, OR RELATED COMPONENTS

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

1.CHECK FOR AN ACTIVE DTC

NOTE: Diagnose and repair any Turbocharger Surge Valve or the Boost Pressure Sensor DTCs before continuing with this test.

1. Start the engine and allow it to reach normal operating temperature.

2. Test drive the vehicle. It may be necessary to perform several decelerations to duplicate the conditions to set the DTC.

3. With the scan tool, read DTCs and record on the repair order.

Is the DTC active or pending?

Yes

•Go To 2

No

•Perform the INTERMITTENT DTC diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).


2.TURBOCHARGER SURGE VALVE RESTRICTED

1. Visually check the Turbocharger Surge Valve for debris or signs of a restriction.

Were any restrictions found?

Yes

•Perform the appropriate repair.
•Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

No

•Replace the Turbocharger Surge Valve in accordance with the Service Information.
•Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
thank you i will see if that fixes the issue
 
1 - 3 of 3 Posts
Top