What does it mean?
C1934 is a Chassis (ABS, traction control, steering) fault code. It indicates: HPU (Hydraulic Pump Unit) Pressurisation Failure.
HPU (Hydraulic Pump Unit) Pressurisation Failure
Severity
High
Can I keep driving?
Avoid extended driving; visit a service soon.
How is this code read?
This is a standard OBD-II code; any basic scanner reads it on vehicles built after 2004.
- CChassis
- 1Manufacturer-specific
- 9Chassis / ABS
- 34Sequence number
Codes From the Same System
All Fault CodesRelated Similar Codes
- C1930Air Suspension Front Compressor Relay Circuit Open
- C1931Air Suspension Front Compressor Relay Circuit Short To Battery
- C1932Air Suspension Front Compressor Relay Circuit Short To Ground
- C1933Solenoid Current Out Of Range
- C1935Chime Circuit Failure
- C1936Hydraulic Pump Relay Circuit Failure
- C1937Steering Wheel Angle Sensor Offset Failure
- C1938Invalid Steering Wheel Angle Sensor ID
This information follows the generic OBD-II definition and does not replace a vehicle-specific diagnosis. The severity rating is rule-based; an authorised diagnostic reading is required for a definitive answer.