LoneStarSC
Registered User
I just got a 1990 SC, and after 2 days of perfect running I have some problems. I was almost home after 3hrs of driving and the check engine light came on and I felt some very mild hiccups under the hood. I stopped and the car would stumble around 500rpms at idle. It eventually died. I started it again and ran a code test (KOER); I got the following:
41 HEGO (HO2S) Sensor Voltage Low/System Lean
91 HEGO (HO2S) Sensor Voltage Low/System Lean
72 MAP, MAF, or BP Sensor out of range during Dynamic Response Test
73 Throttle Position Sensor Fault / Insufficient Range
25 Knock not sensed during Dynamic Response Test
74 Brake On/Off Sensor switch fault; not actuated
I don't think that all of these parts just went bad at once, so what do ya'll think is the best place to start?
41 HEGO (HO2S) Sensor Voltage Low/System Lean
91 HEGO (HO2S) Sensor Voltage Low/System Lean
72 MAP, MAF, or BP Sensor out of range during Dynamic Response Test
73 Throttle Position Sensor Fault / Insufficient Range
25 Knock not sensed during Dynamic Response Test
74 Brake On/Off Sensor switch fault; not actuated
I don't think that all of these parts just went bad at once, so what do ya'll think is the best place to start?