Bobcat Operator Display Code 66 - Engine Air Intake Heater Fault
Can I Drive?
Yes, But Fix Soon
DIY Difficulty
intermediate
Estimated Cost
$0-$2,500 depending on sub-system
What does BOBCAT-CODE-66 mean?
The BOBCAT-CODE-66 (Bobcat) diesel fault code means: Bobcat Operator Display Code 66 - Engine Air Intake Heater Fault. This is a moderate severity code.
Common Symptoms
- Hard cold start, no glow indicator
Probable Causes (Ranked by Likelihood)
- See specific cluster advice for this code family Varies
- Harness / sensor fault in affected system Likely
Step-by-Step Diagnostic Procedure
Refer to Bobcat Operation & Maintenance Manual code list.
Test intake heater relay; check current.
If persistent, connect Bobcat Service Analyzer for full SPN/FMI.
Frequently Asked Questions
What is Bobcat code CODE-66?
Bobcat CODE-66: Bobcat Operator Display Code 66 - Engine Air Intake Heater Fault. This code is reported on Bobcat equipment running the described engine family.
Can I keep working with Bobcat code CODE-66?
Usually drivable short-term, but fix soon to avoid derate or DPF issues.
How much does Bobcat CODE-66 cost to fix?
Typical repair cost: $0-$2,500 depending on sub-system. Off-road diesel shop labor runs $125-$175/hr in 2026. Dealer diagnostic software (Bobcat Service Analyzer) is usually required.