Applicable Systems
EMCP 4.2
Symptoms
Front left wheel speed sensor signal fault; ABS may disable; speedometer may read incorrect.
Possible Causes
- Wheel speed sensor at front left faulty
- Sensor tone ring damaged
- Sensor wiring at wheel damaged
Troubleshooting Steps
- Step 1: Check front left wheel speed sensor resistance
Resistance 1000-2000 ohm - Step 2: Inspect sensor tone ring for damage
Tone ring intact - Step 3: Check sensor air gap (0.5-1.5mm)
Air gap within spec - Step 4: Inspect sensor wiring near wheel for damage
Wiring intact - Step 5: Replace sensor if faulty
Speed reading normal
How to Reset
Clear via Cat ET after sensor replacement.
Common Replacement Parts
- Wheel Speed Sensor P/N: 205-1560
Frequently Asked Questions
- Q: Do wheel loaders have ABS?
Some models have ABS or anti-skid control. Speed sensors at each wheel provide individual wheel speed data for traction and braking control.
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Source: caterpillarfaultcodes.com CID list
Category: Heavy Equipment
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