Powertrain, generic (extended)

P26FF Auto Configuration Throttle Input Not Present (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Some engine controllers set themselves up at power-on by checking which inputs are connected, so one module can serve several engine layouts. On V engines with a separate throttle body for each cylinder bank this includes a throttle position signal per bank. P26FF means the controller expects a throttle input for bank 2 but finds none during this self-configuration; P063E is the same finding for bank 1. Unlike circuit codes such as P0222/P0223, which judge a signal that is present but wrong, this one says the input was not detected at all. No manufacturer documents P26FF publicly. CARB requires throttle position inputs to be checked for wiring faults and for plausibility. Typical causes are an unplugged throttle body, an open signal wire or software meant for another engine; expect a reduced-power mode.

Likely causes

Bank 2 throttle body connector unplugged or not fully seated
Open signal, reference or ground wire to the bank 2 throttle position sensor
Engine controller programmed or replaced with software for a different engine variant

Symptoms

  • Check engine light on
  • Reduced engine power or limp mode
  • Poor throttle response or rough idle

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–600
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

throttle position sensor b2control modulewiring harness

Related codes

P063EP063FP2135

References: law.cornell.edu, en.wikipedia.org, en.wikipedia.org.