986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Idling/ stalling, no pedal response, weird ecu readings

ecp · 03-25-2023, 03:36 PM

I was sitting in traffic and all the sudden the car started sputtering and stalling. I barely could pull into the gas station 10 feet in front of me. I am getting zero response from the gas pedal. I pulled the engine cover while waiting for a tow and the throttle body initializes for a second but doesn’t move with the pedal. I pulled up my durametric and got
P2135 accelerator pedal potentiometer
P0123 accelerator potentiometer 1
P0223 accelerator potentiometer 2
P1120 throttle plate
P1138 throttle position sensor 1
P1140 throttle potentiometer 2
P0103 hot film MAF sensor
P0132 o2 sensor before cat
P0152 o2 sensor before cat
P0138 02 behind cat
P0158 o2 behind cat

Sounds to me like all of these are connected in a circuit that’s shorted out somewhere.
Pedal value is 30.08%
Pedal encoder potentiometers are reading 4.54v
Actual value throttle is 118% even though it’s fully closed
Throttle position sensor 1&2 are both getting 5v

I’m truly at a loss. I pulled my ecu and everything looks okay nothing obvious, I saw some weird cracking but not sure if it’s just age or what. This car is supposed to get in the body shop the end of this week and I still don’t even know if it’s going to be totaled out or not. Would love to get back running again. Any help will be greatly appreciated.

03-25-2023, 03:36 PM	#1
ecp Registered User Join Date: Sep 2020 Location: Georgia Posts: 98	Idling/ stalling, no pedal response, weird ecu readings I was sitting in traffic and all the sudden the car started sputtering and stalling. I barely could pull into the gas station 10 feet in front of me. I am getting zero response from the gas pedal. I pulled the engine cover while waiting for a tow and the throttle body initializes for a second but doesn’t move with the pedal. I pulled up my durametric and got P2135 accelerator pedal potentiometer P0123 accelerator potentiometer 1 P0223 accelerator potentiometer 2 P1120 throttle plate P1138 throttle position sensor 1 P1140 throttle potentiometer 2 P0103 hot film MAF sensor P0132 o2 sensor before cat P0152 o2 sensor before cat P0138 02 behind cat P0158 o2 behind cat Sounds to me like all of these are connected in a circuit that’s shorted out somewhere. Pedal value is 30.08% Pedal encoder potentiometers are reading 4.54v Actual value throttle is 118% even though it’s fully closed Throttle position sensor 1&2 are both getting 5v I’m truly at a loss. I pulled my ecu and everything looks okay nothing obvious, I saw some weird cracking but not sure if it’s just age or what. This car is supposed to get in the body shop the end of this week and I still don’t even know if it’s going to be totaled out or not. Would love to get back running again. Any help will be greatly appreciated.