All codes › P0120
P0120: Throttle/Pedal Position Sensor/Switch "A" Circuit
What it means
There's a general fault in throttle/pedal position sensor "A" circuit.
Severity: High Throttle faults can cause limp mode in traffic.
Common causes
- Failed throttle position sensor
- Worn throttle body
- Damaged wiring
- Connector corrosion
Most common causes first. Exact causes vary by make, model and engine.
Can I fix it myself?
Sometimes DIY. On drive-by-wire cars the TPS is part of the throttle body; a relearn may be needed.
Repair cost
SEEDED ESTIMATE Roughly $190–$580
Most likely repair: throttle body (includes tps on most drive-by-wire cars). Diagnosis fees, taxes and other causes are not included.
| Line | Low | High | Basis |
|---|---|---|---|
| Throttle body (includes TPS on most drive-by-wire cars) | $140 | $344 | Typical listed retail range, source ($870–$1,222 performance units excluded) |
| Labor 0.5–1.5 hr | $50 | $240 | $100–$160/hr, shop survey |
⚠️ This is an editorial placeholder range for this type of repair. It is not based on real invoices or licensed pricing data yet. Real ranges will appear here once enough reader invoices for P0120 are verified.
Verified reader invoices for P0120: 0. Share your repair bill to help build real costs.
Tools that can read P0120
- ScanFixAI: Pro $29.99/mo or $249.99/yr
- OBDAI: Annual PRO bundle $299
- BlueDriver Pro Next-Gen: $119.95 list ($99.95 sale seen)
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