Fault Code Lookup › Powertrain codes › P0123

P0123 Powertrain · generic OBD-II

Throttle/Pedal Position Sensor/Switch 'A' Circuit High

P0123 is a standard code covering engine, transmission, fuel and emissions. It names the system that logged the fault, not the part that failed. Below: which cars owners reported it on, what happened, and recalls on those cars, from 5 complaints filed with NHTSA. Updated November 9, 2026.

  • 5owner reports
  • 4car models
  • 0mention a crash
  • 0mention a fire
  • 2015–2019model years

Which cars get code P0123?

Every model whose owners mentioned P0123 in a complaint, most reports first. Each year opens that car's full problem report. Popular models collect more reports because more of them are on the road.

Where does P0123 show up?

By brand

  • Jeep3
  • Mercedes-Benz1
  • Dodge1

Component the owner filed it under

  1. Electrical System4 (80%)
  2. Engine4 (80%)
  3. Fuel/Propulsion System2 (40%)
  4. Power Train1 (20%)
  5. Forward Collision Avoidance1 (20%)
  6. Air Bags1 (20%)

Is there a recall for P0123?

The others concern the component owners file this code under (Electrical System) on the same cars; they may or may not relate to the code. Recall repairs are free; check your VIN at nhtsa.gov/recalls.

Electrical System: Instrument Cluster/Panel Chrysler (FCA US LLC) is recalling certain 2019 Jeep Cherokee vehicles. The instrument cluster may fail resulting in a lack of activation of warning chimes, messages, and gauges. NHTSA campaign 18V917000 · December 20, 2018 · Affected cars

2019 Jeep Cherokee. Full risk and remedy on each car's report.

Electrical System: Wiring: Front Underhood Chrysler (FCA US LLC) is recalling certain 2018 Jeep Renegade, Compass and Grand Cherokee, RAM 1500 and Promaster, Fiat 500x, Dodge Journey, Challenger, Charger and Durango and Chrysler 300x vehicles, 2017-2018 Jeep Wrangler, Dodge Grand Caravan and Chrysler Town and Country vehicles and 2018-2019… NHTSA campaign 18V524000 · August 9, 2018 · Affected cars

2019 Jeep Cherokee, 2018 Jeep Cherokee, 2018 Jeep Compass. Full risk and remedy on each car's report.

Electrical System: Wiring Chrysler (FCA US LLC) is recalling certain 2014-2018 Dodge Journey, Charger and Durango, RAM 2500, 3500, 3500 Cab Chassis (more than 10,000lb), 4500 Cab Chassis and 5500 Cab Chassis, Jeep Cherokee and Grand Cherokee and Chrysler 300, 2014-2019 RAM 1500, 2015-2018 Dodge Challenger, 2015-2017 Chrysler… NHTSA campaign 18V332000 · May 17, 2018 · Affected cars

2018 Jeep Cherokee. Full risk and remedy on each car's report.

Electrical System: Instrument Cluster/Panel Chrysler (FCA US LLC) is recalling certain model year 2017-2018 Jeep Compass vehicles. The brightness of the backlighting for the Instrument Panel Cluster (IPC) cannot be adjusted. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number… NHTSA campaign 17V740000 · November 21, 2017 · Affected cars

2018 Jeep Compass. Full risk and remedy on each car's report.

Electrical System: Software Chrysler (FCA US LLC) is recalling certain model year 2016 Dodge Dart vehicles manufactured July 25, 2015, to December 16, 2015 and equipped with a 2.0L engine and a manual transmission. Additionally included are certain 2015 Dodge Dart vehicles similarly equipped and brought in for dealer service… NHTSA campaign 16V113000 · February 26, 2016 · Affected cars

2015 Dodge Dart. Full risk and remedy on each car's report.

What happened when owners saw P0123?

4 of the 5 reports, spread across the models above, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.

Check engine light came on. Had it diagnosed within 5 minutes. Code P0123 came up. That is the “Throttle/Pedal Position Sensor/Switch “A” Circuit High Input”. Specific part # 5184349AF. It is built into the throttle body, so whole throttle body must be replaced. Vehicle only has 40,000 miles. Parts Dept at dealer told me they had several of these parts in stock. He was surprised. They only do that when they know there is a problem. It is a safety issue. It can fail and cause engine to quit. Jeep refuses to acknowledge an existing problem. It needs government investigation for safety. I can send picture of diagnosis printout if needed.
2019 Jeep CherokeePower Train, Engine, Fuel/Propulsion SystemNHTSA complaint 11428011 · Aug 6, 2021
DRIVING CAR NORMALLY. I PARKED IN A PARKING LOT AND WENT INTO A STORE. WHEN I CAME OUT TO START THE CAR IT WOULD NOT START. CHARGING INDICATOR LIGHT AND CHECK ENGINE LIGHT CAME ON. AUTO ZONE WAS IN THE PLAZA SO I HAD THE GUY COME OUT AND DO A DIAGNOSTIC. CODES WERE P0123, P2122, P2127, P0222, U0401. WHEN THE GUY WENT BACK INTO THE STORE THE CAR STARTED. WHEN I PARKED AGAIN 10 MINUTES LATER THE CHECK ENGINE AND CHARGE LIGHT DISAPPEARED. CAR RAN FINE FOR ONE DAY. ABOUT 33 HOURS AFTER THAT INCIDENT I PARKED THE CAR AT A PARK FOR LUNCH FROM WORK. TOOK A WALK AND WHEN I RETURNED CAR NEVER CAME ON. DASH WAS FLICKERING, ALL LIGHTS ILLUMINATED, MILEAGE WAS FLASHING, GAUGES WERE FLICKERING, CAR WOULD…
2015 Dodge DartElectrical System, Air Bags, Service BrakesNHTSA complaint 11138905 · Oct 7, 2018
As I was driving my car and was stopped at a red left and when the green light came on my car shut down all of a sudden. My emergency brake turned on and it was not allowing me to turn on my car or drive it. This caused my safety to be jeopardizes because I was on the road and had no warning it was going to turn off on me. Then my engine light went on and i had to have it towed to the nearest mechanic and when they checked the car had 4 codes P0123 P0222 P2111 and U0420. All indicated that it was the Throttle. When my regular mechanic finally checked it he said the Throttle was broken and needed to be replaced. I never had any warning or had my car experience any of this prior to this…
2018 Jeep CompassElectrical System, Engine, Forward Collision AvoidanceNHTSA complaint 11474190 · Jul 15, 2022
Throttle body and accelerator pedal position sensors failed. Component is available for inspection upon request. Independent service center confirmed failure on 1/3/2026 with 6 stored fault codes: P2101, P0122, P0222, P0123, P0223, P2135. Vehicle shuts off while driving without warning at various speeds. Loss of power steering and power brakes occurs when engine stalls, creating immediate risk of crash, injury or death to occupants and other drivers. Manufacturer customer service confirmed in writing 4 times that engine shutting off while driving is a safety issue and that these exact codes match Service Campaign 2022090005. On 1/7/2026, manufacturer denied campaign applies to this vehicle…
2019 Mercedes-Benz C-ClassElectrical System, EngineNHTSA complaint 11747712 · Jul 1, 2026

P0123: questions drivers ask

What does code P0123 mean?

P0123 is a generic OBD-II powertrain code. Its standard definition is "Throttle/Pedal Position Sensor/Switch 'A' Circuit High". The code tells you which system set the fault, not which part failed; the owner reports on this page show what it meant in practice for 4 car models.

Which cars get code P0123 most often?

In NHTSA owner complaints, P0123 is mentioned most for the Jeep Cherokee (2), Dodge Dart (1), Jeep Compass (1), across 4 models and model years 2015 to 2019. Popular models collect more reports because more of them are on the road.

Is there a recall for code P0123?

No NHTSA recall text names P0123 directly. 5 recalls on the cars that report this code concern the same component owners name most (Electrical System); they may or may not relate to the code. Check your VIN at nhtsa.gov/recalls.

What should I do if my car shows P0123?

Write down when the code appeared and what the car did (warning lights, loss of power, noises, speed, weather). Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer or independent workshop to read the stored freeze-frame data before anyone clears the code, and keep the repair order. If the car loses power in traffic, stop driving it. CarHooq does not diagnose: these are owner reports and official recall notices, not repair advice.

How this page was made

CarHooq read the text of every owner complaint filed with NHTSA for 19 US and European brands (model years 2012 onwards) and picked out the diagnostic trouble codes owners wrote down. This page lists every mention of P0123. The definition is the generic SAE J2012 wording; a carmaker may use the code slightly differently. Nothing here is a diagnosis. More answers: the fault code FAQ. Data: NHTSA Office of Defects Investigation (public domain), retrieved November 9, 2026. How CarHooq reports are made.

Is something missing or wrong on this page? Tell CarHooq. One line is enough; every message is read.

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