C1799 on Jaguar
EPB Hall Effect Sensor Failure (Hall Sensor Plausibility)
C1799 on Jaguar vehicles indicates epb hall effect sensor failure (hall sensor plausibility). Au7o has documented this code across 1 Jaguar model — most commonly on XK. The Electronic Parking Brake actuator uses Hall-effect sensors to count motor revolutions so the module can measure cable travel and applied clamp load. C1799 sets when those Hall sensor signals are missing, erratic, or implausible relative to the commanded motor operation, so the module cannot verify how far the actuator has travelled. Like C1785, Jaguar notes this fault is only detectable while the EPB motor is actually running. Typical repair costs on Jaguar range from $500 to $1,300, depending on the specific model and root cause.
Common Causes of C1799
- •Failed Hall-effect sensor inside the EPB actuator assembly
- •Open, shorted or chafed Hall sensor signal / supply wiring to the actuator
- •Corroded or moisture-contaminated actuator connector (rear underbody exposure)
- •Worn or seized actuator gearbox producing implausible travel counts
- •Failed EPB control module
C1799 on Jaguar by Model
Jaguar XK(1 issue)
- Electronic Parking Brake (EPB) Motor / Module Failure2007-2015
The X150 electronic parking brake is a frequent trouble spot. Small plastic serrated gears inside the EPB motor unit strip, the wiring harness between the parking brake module (PBM) and actuator chafes, and the module/switch can fault. Failures range from a 'Park Brake Fault' warning to the brake staying stuck ON so the car cannot be moved. The plastic gears are not sold separately, so a full motor assembly is usually required.
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View C1799 across all makes →Frequently Asked Questions
What does C1799 mean on Jaguar?▼
C1799 stands for "EPB Hall Effect Sensor Failure (Hall Sensor Plausibility)." The Electronic Parking Brake actuator uses Hall-effect sensors to count motor revolutions so the module can measure cable travel and applied clamp load. C1799 sets when those Hall sensor signals are missing, erratic, or implausible relative to the commanded motor operation, so the module cannot verify how far the actuator has travelled. Like C1785, Jaguar notes this fault is only detectable while the EPB motor is actually running. On Jaguar specifically, this code is documented across 1 model.
What causes C1799 on Jaguar vehicles?▼
Common causes on Jaguar: Failed Hall-effect sensor inside the EPB actuator assembly, Open, shorted or chafed Hall sensor signal / supply wiring to the actuator, Corroded or moisture-contaminated actuator connector (rear underbody exposure), Worn or seized actuator gearbox producing implausible travel counts, Failed EPB control module. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C1799 on a Jaguar?▼
Repair costs on Jaguar range from $500 to $1,300, depending on the specific model and root cause.
Which Jaguar models have C1799 documented?▼
Au7o has documented C1799 on 1 Jaguar model: XK.