P0175 Fuel System Bank 2 Sensor 1 Rich

P0175 Fuel System Bank 2 Sensor 1 Rich - The Powertrain Control Module (PCM) multiplies the short term adaptive value and the long term adaptive value together. If the total corrective value is above a calibrated threshold for than 30 seconds, a fault is set. Default action the MIL light illuminate.

When monitored P0175 code

• With the engine running.
• Upstream closed loop fuel control.
• Ambient/battery temperature above -6.7°C (20°F).
• Battery voltage above 10.99 volts.
• Attitude below 2590.8 m (8500 ft)

Possible causes P0175 code

• Evap purge solenoid operation.
• Bank 1 VVT solenoid driver circuit shorted to voltage.
• O2 sensor heater operation.
• O2 signal circuit.
• O2 return circuit.
• O2 sensor.
• MAP sensor.
• ECT sensor.
• Engine mechanical.
• Fuel filter/pressure regulator.
• Powertrain Control Module (PCM).

Diagnose P0175 Fuel System Bank 2 Sensor 1 Rich

(Sorry!!! Step 1-5, refer to code P0172)
Step 1. Check active DTC

Step 2. Check the fuel delivery system

Step 3. Check the Exhaust system for leaks

Step 4. Check the engine coolant temperature sensor operation

Step 5 . Check the Oxygen sensor operation

Step 6. O2 sensor 2/1 Heater operation

Turn the ignition off. Wait a minimum of 10 minutes to allow the O2 sensor to cool down before continuing the test. Allow the O2 sensor voltage to stabilize at 5.0 volts. Turn the ignition on. With the scan tool, actuate the O2 sensor 2/1 heater test. With the scan tool, monitor O2 sensor 2/1 heater voltage for at least two minute.

Does the voltage stay above 4.5 volts?

Yes, verify that there is good pin to terminal contact in the O2 sensor 2/1 and Powertrain Control Module (PCM) connectors. If no problems were found with the connectors, replace the O2 sensor 2/1.

No, go to step 7.

Step 7. Check the MAP sensor operation

Perform the CHECKING THE MAP SENSOR OPERATION test procedure this a site (See a Sitemaps or label).

Were any problems found?

Yes, repair as necessary.

No, go to step 8.

Step 8. Evap purge solenoid operation
Turn the ignition off. After disconnecting the Evap purge solenoid vacuum connections, inspect the lines and solenoid for signs of contamination.
Disconnect coth vacuum hoses at the Evap purge solenoid. Using a hand vacuum pump, apply 5 in. Hg. to the '' ENGINE '' side of the Evap purge solenoid. Start the engine, using the scan tool, navigate to system test and start the purge solenoid vapors system test. Select open to actuate the purge solenoid to the ON position. The vacuum should drop when purge solenoid is actuate.

Does the solenoid function as described above?

Yes, go to step 9.

No, verify that there pin to terminal contact in the Evap purge solenoid and Powertrain Control Module (PCM) connectors. Replace the Evap purge solenoid if no problems were found with the connectors. Perform the Powertrain Verification Test.

Step 9. Engine Mechanical

Turn the ignition off, check for any of the following conditions/mechanical problems :

• AIR INDUCTION SYSTEM - must be free from leaks.
• ENGINE VACUUM - must be at least 13 inches in neutral.
• ENGINE VALVE TIMING - must be within specifications.
• ENGINE COMPRESSION - must be within specifications.
• ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks.
• ENGINE PCV SYSTEM - must flow freely
• TORQUE CONVERTER STALL SPEED - must be within specifications.
• POWER BRAKE BOOSTER - no internal vacuum leaks.
• FUEL - must be free of contamination.
• FUEL INJECTOR - plugged or restricted injector, control wire not connected to incorrect injector.

Are there any engine mechanical problems?

Yes, repair as necessary.

No, go to step 10.

Step 10. Check related PCM and component connections

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