Poor DRIVEABILITY

Hesitation/Poor Acceleration

• On all models, check fuel pump control circuit. See FUEL PUMP CONTROL CIRCUIT under COMPUTERIZED ENGINE CONTROLS in appropriate SYSTEM & COMPONENT TESTING article or on some models, see DTC P0230: FUEL PUMP PRIMARY CIRCUIT under DIAGNIOSTIC TESTS in appropriate SELF-DIAGNOSTICS article.
• On models with electronic controlled automatic transaxle/transmission, (except MR2 and Prius), check for problem with electronic controls for automatic transaxle/transmission. See appropriate ELECTRONIC CONTROLS article in AUTOMATIC TRANSMISSIONS.
• On Avalon, Corolla, ECHO, Highlander, Matrix, Prius and 4Runner, check A/C-cut control system circuit. See A/C-CUT CONTROL SYSTEM CIRCUIT under COMPUTERIZED ENGINE CONTROLS in appropriate SYSTEM & COMPONENT TESTING article.
• On Prius, there may be a problem with the hybrid transaxle.

Surging

• On Camry (except Solara), Corolla, Matrix, MR2 and RAV4 models, check spark plugs. Replace as necessary.
• On all models, check fuel pump control circuit. See FUEL PUMP CONTROL CIRCUIT under COMPUTERIZED ENGINE CONTROLS in appropriate SYSTEM & COMPONENT TESTING article or on some models, see DTC P0230: FUEL PUMP PRIMARY CIRCUIT under DIAGNIOSTIC TESTS in appropriate SELF-DIAGNOSTICS article.
• On Camry (except Solara), Corolla, Matrix, MR2 and RAV4 models, check injector circuit. See DTC P0300: RANDOM/MULTIPLE CYLINDER MISFIRE DETECTED under DIAGNOSTIC TESTS in appropriate SELF-DIAGNOSTICS article.