P0122 on Volvo
Throttle/Pedal Position Sensor/Switch 'A' Circuit Low Input
P0122 on Volvo vehicles indicates throttle/pedal position sensor/switch 'a' circuit low input. Au7o has documented this code across 1 Volvo model — most commonly on S60. This generic code means the PCM detected a lower-than-expected voltage from the throttle position sensor (or accelerator pedal position sensor) 'A' circuit. This sensor tells the computer how far the throttle/pedal is open so it can manage fuel, timing, and on drive-by-wire systems the throttle itself. A low or lost signal can cause hesitation, surging, poor acceleration, stalling, or limp-home mode, so it should be diagnosed promptly. Typical repair costs on Volvo range from $300 to $700, depending on the specific model and root cause.
Common Causes of P0122
- •Faulty throttle position sensor
- •Short to ground or open in the TPS signal circuit
- •Damaged or corroded TPS connector
- •Loss of reference voltage or bad ground to the sensor
- •Worn throttle body / TPS contacts
- •Chafed or pinched wiring harness
- •Faulty PCM (rare)
P0122 on Volvo by Model
Volvo S60(1 issue)
- Electronic Throttle Module (ETM) Failure2001-2004
The 2001-2004 S60 (and other P2 platform Volvos) is notorious for ETM failure due to a design flaw in the throttle body electronics. The module develops internal solder joint cracks and corroded contacts, causing the car to enter limp mode, stall at idle, or refuse to accelerate. Volvo issued an extended warranty covering ETMs up to 10 years/200,000 miles, but many are now beyond that coverage.
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View P0122 across all makes →Frequently Asked Questions
What does P0122 mean on Volvo?▼
P0122 stands for "Throttle/Pedal Position Sensor/Switch 'A' Circuit Low Input." This generic code means the PCM detected a lower-than-expected voltage from the throttle position sensor (or accelerator pedal position sensor) 'A' circuit. This sensor tells the computer how far the throttle/pedal is open so it can manage fuel, timing, and on drive-by-wire systems the throttle itself. A low or lost signal can cause hesitation, surging, poor acceleration, stalling, or limp-home mode, so it should be diagnosed promptly. On Volvo specifically, this code is documented across 1 model.
What causes P0122 on Volvo vehicles?▼
Common causes on Volvo: Faulty throttle position sensor, Short to ground or open in the TPS signal circuit, Damaged or corroded TPS connector, Loss of reference voltage or bad ground to the sensor, Worn throttle body / TPS contacts. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0122 on a Volvo?▼
Repair costs on Volvo range from $300 to $700, depending on the specific model and root cause.
Which Volvo models have P0122 documented?▼
Au7o has documented P0122 on 1 Volvo model: S60.