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HOMESERVICE MANUALSCHEVROLET2001CAVALIER LS, 2.4 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 8 (ENGINE CONTROL SYSTEM SELF-DIAGNOSTICS - 5.7L)DIAGNOSTIC TESTSDTC P0175: FUEL TRIM SYSTEM RICH - BANK 2CIRCUIT DESCRIPTION
2001 Chevrolet Cavalier LS, 2.4 T

Circuit Description

2001 Chevrolet Cavalier LS, 2.4 TSECTION Circuit Description
WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

PCM monitors oxygen sensor signal voltage and adjusts fuel delivery based on signal voltage. A change made to fuel delivery is indicated by long and short term fuel trim values.

Short term fuel trim values change rapidly in response to HO2S signal voltages. These changes fine tune engine fueling. Long term fuel trim values changes in response to trends in short term fuel trim. Long term fuel trim makes coarse adjustments to fueling in order to re-center and restore control to short term fuel trim. Long term and short term fuel trim can be monitored by use of scan tool.

Ideal fuel trim value is about zero percent. A positive fuel trim indicates that PCM is adding fuel to compensate for a lean condition. A negative fuel trim indicates that PCM is reducing amount of fuel to compensate for rich condition. DTC will set if PCM detects an excessively rich condition.

For duplication of DTC, ensure:

  • DTCs P0101-P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0121-P0123, P0125, P0200, P0300, P0335, P0336, P0351-P0358, P0401, P0404, P0405, P0410, P0412, P0418, P0443, P0500, P0502, P0503, P1111, P1112, P1258, P1404, P1415 or P1416 are not set.
  • ECT is 122-239°F (50-115°C).
  • Barometric pressure is greater than 74 kPa.
  • MAF is 5-90 gm/s.
  • MAP is 26-90 kPa.
  • IAT -4°C to 194°F (-20°C to 90°C).
  • Engine speed is 400-3000 RPM.
  • TP sensor angle is less than 90 percent.
  • Vehicle speed is less than 85 MPH.

RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.