Suzuki Hayabusa B2594 Engine Trouble Code
What is Suzuki Hayabusa B2594?
Suzuki Hayabusa B2594 indicates potential catalytic converter failure. If completely failed, your vehicle may not run properly and fuel economy will suffer significantly. Average replacement cost is $2,000–$2,140. This repair requires professional service and should not be delayed.
B2594 on the Suzuki Hayabusa
The Suzuki Hayabusa features a sequential multi-port fuel injection (SMFI) system where injector timing is tightly synchronised with the crankshaft signal. Wear on the crankshaft reluctor ring teeth produces signal dropout events that accumulate and eventually trigger B2594.
Code Information
| Code Type: | OBD-II Body (B) Trouble Code |
| System: | Body |
| Vehicle: | Suzuki Hayabusa |
| Brand: | Suzuki |
| Model: | Hayabusa |
| Code: | B2594 |
B2594 Suzuki Hayabusa Symptoms
Check Engine Light
Illuminated Suzuki Hayabusa dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Suzuki Hayabusa
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Suzuki Hayabusa
Increased Emissions
Failed emissions test due to B2594
B2594 Code Structure
Understanding what each digit means in the B2594 body trouble code:
| B | 2 | 5 | 9 | 4 |
|---|---|---|---|---|
| Body Code | Fuel And Air Metering (Injector Circuit Malfunctions Only) | Fuel Composition Sensor Circuit Malfunction | Crankshaft Position Sensor A Circuit Malfunction | Timing Reference High Resolution Signal A Too Many Pulses |
How to Fix Suzuki Hayabusa B2594
Diagnostic Steps:
The catalytic converter has oxygen sensors before and after it. When warm and in closed-loop mode, the upstream O2 sensor reading should fluctuate, while downstream should remain steady.
Repair Solution:
Power steering pressure switch monitors system operation. If pressure changes are not detected after calibrated speed transitions, this DTC sets. Verify PSP switch operation and check for circuit opens or shorts.
Technical Notes:
B2594 DTCs can be triggered by upstream issues. For example, a dirty MAF sensor may cause incorrect fuel-trim adjustments, leading oxygen sensors to report mixture problems. Address root causes first.
Suzuki Hayabusa B2594 Repair Cost
MAF sensor replacement on the Suzuki Hayabusa for a B2594 fault runs $220–$380 at a franchised dealer. OEM-equivalent aftermarket sensors are available for $80–$130 and are a reliable option for vehicles outside the factory warranty period.
B2594 Description
B2594 engine trouble code is related to Timing Reference High Resolution Signal A Too Many Pulses.
Main Cause
The primary reason for B2594 OBD-II Engine Trouble Code is: Fuel Composition Sensor Circuit Malfunction.
Common B2594 Misdiagnosis on the Suzuki Hayabusa
Fuel injector replacement is over-prescribed on the Suzuki Hayabusa for B2594 when the actual fault is a weak fuel pump. Low fuel rail pressure causes lean misfire that looks identical to injector failure in static scan data without a live fuel pressure test.
DIY Repair Guide: B2594 on Suzuki Hayabusa
When replacing sensors on the Suzuki Hayabusa, always use anti-seize compound on the thread and dielectric grease on the electrical connector. This simple habit prevents the most common causes of sensor-related callbacks after repair.
Preventing B2594 on the Suzuki Hayabusa
Inspecting the Suzuki Hayabusa wiring harness conduit grommets annually — especially the floor pan grommet — costs nothing and takes 10 minutes. Catching moisture ingress early eliminates the most common electrical trigger for B2594 on this model.
Frequently Asked Questions — Suzuki Hayabusa B2594
A: If your Suzuki Hayabusa is within the factory powertrain warranty period (typically 3–5 years or 60,000–100,000 miles depending on region and generation), B2594 repairs caused by component defects should be covered. Bring your service history to the dealer appointment.