P1429 on 2014-2018 Chevrolet Silverado — Brake System Vacuum Pump Activation: Open Circuit
1 vehicles · 1 makes
Most Reported On
P1429 is an OBD-II diagnostic trouble code meaning “Brake System Vacuum Pump Activation: Open Circuit.” Manufacturer-specific code used by Volkswagen and Audi; Ross-Tech lists it as VAG code 17837 with the fault text "Circuit for Brake Vacuum Pump: Open Circuit." The control module commanded the electric brake vacuum pump on and detected an open in the pump's activation circuit, so the pump did not respond as expected. Manufacturer documentation lists the check engine light as the confirmed symptom; on vehicles that depend on this pump for power-brake assist, a genuinely dead pump can also make the pedal noticeably harder and lengthen stopping distances. Other manufacturers assign different meanings to P1429, so confirm the definition against the vehicle's make before diagnosing. This code is most commonly reported on 2014-2018 Chevrolet Silverado.
Common Causes
Diagnostic Tools
P1429 does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
FAQ
What does P1429 mean?
P1429 stands for "Brake System Vacuum Pump Activation: Open Circuit." Manufacturer-specific code used by Volkswagen and Audi; Ross-Tech lists it as VAG code 17837 with the fault text "Circuit for Brake Vacuum Pump: Open Circuit." The control module commanded the electric brake vacuum pump on and detected an open in the pump's activation circuit, so the pump did not respond as expected. Manufacturer documentation lists the check engine light as the confirmed symptom; on vehicles that depend on this pump for power-brake assist, a genuinely dead pump can also make the pedal noticeably harder and lengthen stopping distances. Other manufacturers assign different meanings to P1429, so confirm the definition against the vehicle's make before diagnosing.
What are the most common causes of P1429?
The most common causes of P1429 are: Failed electric brake vacuum pump (most common), Blown vacuum pump fuse or failed relay, Open, chafed, or corroded wiring between the module and the pump, Corroded or backed-out connector pins at the pump, Faulty brake booster control module (J542). The specific cause varies by vehicle.
How much does it cost to fix P1429?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P1429?
Au7o has documented P1429 across 1 vehicle models from 1 manufacturers: Chevrolet.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.