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Home / DTC / P212F — Throttle/Pedal Position Sensor/Switch F/G Voltage Correlation

P212F — Throttle/Pedal Position Sensor/Switch F/G Voltage Correlation

Detailed page for trouble code P212F.

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P212F

Generic P — Powertrain

Throttle/Pedal Position Sensor/Switch F/G Voltage Correlation

Brand: Generic
Type: P — Powertrain
Views: UK: 12 EN: 21 RU: 23
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Page language: EN

Causes

  • Damaged or corroded connector(s) at pedal or throttle body sensors
  • Broken, shorted, or pinched wiring (signal, reference 5V, or ground)
  • Failed accelerator pedal position sensor or throttle position/accelerator pedal sensor labeled "F"
  • Contaminated or wet connectors causing intermittent signals
  • Poor or missing sensor ground or reference voltage
  • Throttle body/mechanism fault preventing expected position change

Symptoms

  • Check Engine MIL illuminated
  • Reduced engine power / limp-home mode
  • Poor or delayed throttle response; hesitation or surging
  • Inconsistent or no throttle movement despite pedal input
  • Possible hard start or inability to accelerate normally
  • Fault may be intermittent if wiring/connector issue

What to check

  • Read stored freeze frame data and all related codes; note battery voltage at time of fault
  • Visually inspect connectors and wiring for damage, corrosion, or water intrusion at pedal, throttle body, and PCM
  • Verify there are no other related codes (e.g., sensor low/high input codes)
  • Check that the 5V reference and ground are present at both sensors with key on
  • Use a scan tool to monitor pedal and throttle sensor voltages/values simultaneously while pressing the pedal
  • Wiggle test wiring and connectors while watching live data for intermittent changes

Signal parameters

  • Typical reference voltage: ~5.0 V (varies by manufacturer) — must be stable
  • Typical sensor output range: approximately 0.2–4.8 V (varies by design); signals should change smoothly with pedal travel
  • Dual/ redundant pedal sensors often produce similar-looking ramps or complementary outputs; deviation beyond manufacturer correlation limits triggers code
  • Signal correlation: throttle and pedal sensor waveforms/voltages must track proportionally — compare on a graphing scan tool
  • No rapid jitter, dropouts, or spikes in signal when pedal is moved

Diagnostic algorithm

  1. Connect a capable scan tool; record freeze frame and all related DTCs. Clear codes and attempt to re-create the fault to capture live data.
  2. Visually inspect connectors, harnesses, and mounting for the accelerator pedal and throttle body. Repair damaged wiring or connectors.
  3. With key ON (engine off), backprobe the sensor connector(s): verify stable 5V reference and good ground. Replace or repair if missing or noisy.
  4. Monitor pedal and throttle sensor outputs with the scan tool while slowly and steadily moving the pedal from rest to wide open. Look for smooth, proportional change and compare traces for correlation.
  5. If signals are out of correlation, swap suspected sensor (if practical) with a known-good unit or substitute replacement, or bench-test the sensor per manufacturer procedure.
  6. If wiring is suspected, perform continuity and short-to-power/ground tests between sensors and the PCM. Repair any short/open faults and retest.
  7. If harness/connectors and sensors test good, check for required throttle/pedal adaptation/relearn procedures and perform per service manual.
  8. If fault persists after sensors, wiring, and relearn are confirmed good, consider PCM diagnostics or replacement as a last resort (verify with manufacturer-specific tests).
  9. After repairs, clear codes and road-test to confirm the fault does not return and normal throttle response is restored.

Likely causes

  • Faulty accelerator pedal sensor (most common)
  • Faulty throttle position sensor or throttle actuator sensor
  • Wiring harness damage between pedal and PCM or throttle and PCM
  • Corroded/loose connector pin(s) at sensor(s)
  • Missing 5V reference or poor ground at sensor
  • ECM/PCM fault or required reprogram/relearn

Fault status

⚠️ Status
P212F - Throttle/Pedal Position Sensor/Switch F Voltage Correlation detected. Check pedal and throttle sensors, wiring, reference and ground, and perform correlation testing.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours

Similar codes

P2135 P0120 P0121 P0122 P0220 P0221
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