P0504 on Hyundai Vehicles: Brake Switch A/B Correlation
The two contacts in the brake pedal switch disagree on whether you're braking; check the pedal stopper first. P0504 →
8Complaints mentioning the code
#1Rank among 2 brands
1.1%Share of Hyundai DTC complaints
In NHTSA owner complaints we analyzed for Hyundai, P0504 was mentioned 8 times.
Notes by brand
Hyundai and Kia models are well known for the brake pedal stopper pad disintegrating with age. The switch plunger then drops into the empty hole, the brake lights may stay on, and codes such as P0504 appear along with a shifter that won't leave Park.
Most mentioned models
| Hyundai Sonata | 4 | |
|---|---|---|
| Hyundai Santa Fe | 3 | |
| Hyundai Azera | 1 |
Model years mentioned
Components named in these complaints
- Service Brakes (7)
- Electronic Stability Control (esc) (3)
- Exterior Lighting (2)
- Electrical System (2)
- Vehicle Speed Control (1)
Often appears together with
Possible causes
- Stopper pad on the pedal arm worn or missing, so the switch plunger goes through the hole and one contact never resets
- Switch out of adjustment after pedal, dash or switch work
- Internal wear in one of the two switch contacts
- Blown fuse feeding only one of the two circuits
Related codes
Source: NHTSA Complaints API (US government open data), analyzed by DTC mention.