P0121 DTC code
Thread Starter
Safety Car
Joined: May 2000
Posts: 4,824
Likes: 351
From: Albuquerque NM
P0121 DTC code
Anybody seen this one before?
The generic writeup is: "throttle pedal position sensor/switch A circuit range/performance problem".
I've been fighting a low throttle opening surge, been attributing it to my new cam and tuning, but maybe not.
The generic writeup is: "throttle pedal position sensor/switch A circuit range/performance problem".
I've been fighting a low throttle opening surge, been attributing it to my new cam and tuning, but maybe not.
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Joined: Dec 2002
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From: Lakewood Ranch, FL
Le Mans Master
Joined: Aug 2002
Posts: 8,472
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From: Houston TX
St. Jude Donor '11
Since you mentioned the cam I'd say it's a tune problem. The P0121 (and P0101 and P0106) codes can pop up due to the airflow and or MAP delta does not fall within range of the table. There are three tables in the Engine Diags/General tab (In HP Tuners), Max airflow VS: RPM and Max airflow delta VS: TPS and Max MAP delta VS: TPS.
