Did it act exactly the same? I just want to be sure, this comp is from a 92 truck, if so the codes are defined as follows
21- coolant sensor out of range
23-TPS out of range
25-Knock not sensed during dynamic response test
33- EGR not opening
41- No HEGO (o2 sensor) switching.
You should double check all grounds to be sure, most of the engine sensors share grounds, that may be why the TPS, Knock Sensor, EGR and Coolant sensor and o2 are having a problem
Wednesday, February 4th, 2009 AT 4:00 PM