#throttle
5 posts in Car Diagnostics blog about "throttle" — OBD-II diagnostics, DTC codes, repair. ← All posts
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P2074: MAP/MAF and throttle position correlation
Three sensors that should agree about how much air is entering the engine. When they do not, the ECU cannot tell which one is lying — but you can.
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P2101 and P2110: throttle actuator control motor range and forced limited RPM
P2110 is not a fault in itself — it is the ECU announcing it has capped your engine speed. The fault that caused it is somewhere else in the list.
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P2135 and P2138: throttle and pedal sensor correlation faults
Two codes that tell you exactly which end of the drive-by-wire system to look at. Reading them correctly is the difference between a pedal and a throttle body.
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Revs hang between shifts: emissions calibration, not a fault
Lift off to change gear and the revs stay up for a moment before falling. Almost every modern manual does it, and the reason is not what most people assume.
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P0121 to P0123: throttle position sensor circuit faults
On a drive-by-wire engine the throttle sensor is a safety-critical input, which is why these codes send the car into limp mode rather than tolerating an error.