Reduced Engine Power message Check Engine Light on Traction Control light on?

Hello,

Yes, I have seen the APP cause this exact issue, though it would be best to scan the car for codes first, here is a video to help.

https://www.youtube.com/watch?v=LBCpCWEFnTg&t

Here is the location and how to change the sensor out which is right above the gas pedal. You can try to get a used one from ebay, we have had good luck for less getting used pats from there. Clear the codes once the repair has ben made. Check out the images (below). Please let me know what happens.

Here are the codes that came up on my scanner.

Report# 116

Engine Scan - Aug 07, 2026

VEHICLE INFORMATION

Year 2007 Odometer 240,000 miles Make CHEVROLET VIN 1G1AK55F777116363 Model COBALT

EMISSIONS

NOT READY for emissions test

Repairs may be required

A red light indicates a problem in one or more of the vehicle’s systems that will prevent the vehicle from passing an emissions test. Incomplete Monitors

CAT O2S

Completed Monitors

CCM FUE MIS EVA HTR

ENGINE CODES (OBD2) 9 Codes

Most Likely Cause

P2127 MIL DTC

Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

Most Likely Fix

Replace Accelerator Pedal Position Assembly

Accelerator Pedal Sensor Qty: 1

Other Possible Fix

Replace Accelerator Pedal Position Sensor (APPS)

Accelerator Pedal Sensor Qty: 1 Page 1 of 5

Confirmed Codes

These issues have been confirmed by the onboard diagnostics.

P2127 Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

P0446 Evaporative Emission (EVAP) Vent System Performance

P0700 Transmission Control Module Requested MIL Illumination

P2122 Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

P2138 Accelerator Pedal Position (APP) Sensors 1-2 Not Plausible

P0741 Torque Converter Clutch (TCC) System Stuck Off

Pending Codes

These issues haven’t been confirmed yet, and will clear on their own if they don’t reoccur.

P0446 Evaporative Emission (EVAP) Vent System Performance

P0700 Transmission Control Module Requested MIL Illumination

P0741 Torque Converter Clutch (TCC) System Stuck Off

FREEZE FRAME - Snapshot when the MIL DTC was recorded

MIL Code P2127 Fuel Sys 1 CL Fuel Sys 2 N/A Calc Load 51.8 % ECT 171 °F STFT B1 -15.6 % LTFT B1 0.8 % MAP 13 inHg Eng RPM 774 Veh Speed 0 mph Spark Adv 10.5 ° IAT 117 °F MAF 0.80 lb/min TPS 22.0 % Run Time 81 sec Command EVAP 0.0 % Fuel Level 46.7 % Warm-up DTC Clr 0 Clr Dist 0 miles EVAP_VP -16.64 InH2O BARO 29 inHg CAT Te 11 1027 °F ECU Volts 14.359 V LOAD Value 35.7 % EQ Ratio 0.999 Rel TPS 9.4 % Ambient 113 °F TPS B 21.2 % ACC Pedal D 18.4 % ACC Pedal E 6.3 % Command TAC 13.7 %

SCHEDULED MAINTENANCE

CURRENT MILEAGE: 240,000 MILES Estimated Cost: $3039.49

Based on our data, the following maintenance is due for your vehicle at 240,000 miles:

(To see updated Scheduled Maintenance, visit the Vehicle Care section in the app.)

Page 2 of 5

Wear Items

Change Engine Oil and Filter

Engine Oil Qty: 5 Engine Oil Filter Qty: 1

Lube Chassis, Suspension and Steering Systems

Multi Purpose Lubricant Qty: 1

Replace Cabin Filter

Cabin Air Filter Qty: 1

Inspection Items

Inspect Air Filter

Inspect Brake System, Friction Material & Hydraulic System

Inspect Cooling System, Hoses & Clamps

Inspect For Fluid Leaks

Inspect Seat Belts & Related Components

Inspect SRS System

Inspect Steering & Suspension Components

Inspect Throttle Body

Inspect Tires, Wheels & Related Components

Inspect Wiper & Washer System

Rotate Tires, Inspect Tire Wear, & Adjust Tire Pressure

PREDICTED REPAIR

6 ITEMS

Based on our data, there are no predicted repairs within 12 months or 15,000 miles of your vehicle’s current mileage.

(To see updated Predicted Repairs, visit the Vehicle Care section in the app.)

Page 3 of 5

8% Probability: Clean Fuel Injector(s) ~$211.28 Fuel System Cleaner Qty: 1 Fuel Injector Cleaner Qty: 1

5% Probability: Replace Evaporative Emissions (EVAP) Purge Solenoid ~$229.34 Vapor Canister Vent Solenoid Qty: 1 Vapor Canister Purge Valve Qty: 1

5% Probability: Replace Throttle Body Assembly ~$628.27 Fuel Injection Throttle Body Assembly Qty: 1

18% Probability: Replace Mass Air Flow (MAF) Sensor ~$260.41 Barometric Pressure Sensor Qty: 1 Mass Air Flow Sensor Qty: 1

14% Probability: Replace Evaporative Emissions (EVAP) Canister Purge Control Valve ~$230.00 Vapor Canister Purge Valve Qty: 1 Vapor Canister Purge Solenoid Qty: 1

10% Probability: Replace Evaporative Emissions (EVAP) Canister Vent Solenoid ~$228.07 Vapor Canister Vent Solenoid Qty: 1

WARRANTY STATUS

General

Basic Warranty

Up to 36 months or 36,000 miles

Roadside Assistance Warranty

Up to 60 months or 60,000 miles

Powertrain

Electric/Hybrid Warranty

Up to 96 months or 100,000 miles

Emissions Warranty

Up to 96 months or 80,000 miles

Powertrain Warranty

Up to 60 months or 100,000 miles

Chassis

Tire Warranty

Up to 72 months or 30,000 miles

Page 4 of 5

Body

Corrosion Coverage Warranty

Up to 36 months or 36,000 miles

Rust Perforation Limited Warranty

Up to 72 months or 100,000 miles

TECHNICAL SERVICE BULLETINS & RECALLS

Dealer Recalls 37 NHTSA Safety Recalls 6

Technical Service Bulletins 1562 Visit the ‘Vehicle Care’ section in the app for more details

Page 5 of 5

The Reduced Engine Power + Check Engine + Traction Control symptoms fit the accelerator-pedal codes extremely well:

P2122 — APP Sensor 1 circuit low voltage
P2127 — APP Sensor 2 circuit low voltage
P2138 — APP Sensors 1 and 2 correlation/plausibility fault

Have you replaced the part in the above post and cleared the codes?

No. I wanted to let you look at the codes and get your opinion first before I spend that much money on a part.

Yep, gotcha, I would replace the pert and clear the codes.