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P0121 Diagnostic Trouble Code Discussion for September 2010

Throttle Position Sensor Does Not Agree With MAP

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Trouble Ticket Help Requests for DTC P0121
Help Request Posted
1998 Isuzu Rodeo S 3.2L Poor Idle Quality, Hesitation, Surge, Stall, Misfire, MIL Lamp on VIN: 4S2CM58W4W
P0121: Throttle Position Sensor Signal Range/Performance. This is a well-worn Rodeo which we repaired 500 miles ago. At that time a shredded belt chopped up some wires by the radiator. Customer now states she heard a loud noise or bang then the car started running poorly: no power, stalling. And she's not kidding. it...
September 09, 2010
1997 Chevrolet P30 7.4L Excessive Emissions VIN: 1GBLP37J4V
P0121: TP Sensor Performance. Towed in customer thought head gasket problem. Smoke out tail pipe was black. Inspected and found a spark plug wire melted. Replaced plugs and wires. Autolite double platnium. Engine still ran rich and from o2 readings and pulling plugs only on bank 2. This is...
September 30, 2010