2007 Sierra 5.3l no throttle response
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2007 Sierra 5.3l no throttle response
started off with code P2123 - Throttle/Pedal Position Sensor/Switch "D" Circuit High Input
I monitored the APPS voltage and it did not change on D or E as I depressed the pedal
I replaced the accelerator sensor and then the TPS
I eventually found an issue with mice eating through APPS wiring under the hood by the fuse box. I repaired the wiring.
now I have no throttle response, but the engine idles smoothly now.
The code has changed now
i am now getting P2138 code. the PID values for the APPS looks good
I am thinking it may need a throttle sensor relearn???, but I can't find anything that helps
I am using ODBWiz - ODBLink MX+
any help would be greatly appreciated
I monitored the APPS voltage and it did not change on D or E as I depressed the pedal
I replaced the accelerator sensor and then the TPS
I eventually found an issue with mice eating through APPS wiring under the hood by the fuse box. I repaired the wiring.
now I have no throttle response, but the engine idles smoothly now.
The code has changed now
i am now getting P2138 code. the PID values for the APPS looks good
I am thinking it may need a throttle sensor relearn???, but I can't find anything that helps
I am using ODBWiz - ODBLink MX+
any help would be greatly appreciated
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From: Flint, MI USA
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I had to look this one up:
Based on this, I'd look at all of the wiring leading to the throttle body.
The P2138 code is a diagnostic trouble code (DTC) that indicates a problem with the voltage correlation between the throttle position sensors or accelerator pedal position sensors in a vehicle. When this code is triggered, the Engine Control Module (ECM) can't determine the accelerator'* position, so the vehicle'* throttle response is limited and a warning light turns on.
Here'* some more information about the P2138 code:
When the accelerator pedal is pressed, a sensor sends a signal to the ECM, which then sends a voltage reading to the electric motor to open the throttle plate. The throttle body contains two embedded sensors that convert the throttle opening amount to a voltage signal, which is then sent back to the computer. The ECM monitors the correlation between the two voltage readings.
When the ECM detects that the voltage signals don't correlate, it can't determine the accelerator position, which causes the warning light to turn on and limits the throttle response.
Here'* some more information about the P2138 code:
When the accelerator pedal is pressed, a sensor sends a signal to the ECM, which then sends a voltage reading to the electric motor to open the throttle plate. The throttle body contains two embedded sensors that convert the throttle opening amount to a voltage signal, which is then sent back to the computer. The ECM monitors the correlation between the two voltage readings.
When the ECM detects that the voltage signals don't correlate, it can't determine the accelerator position, which causes the warning light to turn on and limits the throttle response.
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denaliman03
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Jan 11, 2016 10:32 AM