Applicable Systems
OBD-II
Symptoms
TPS signal doesn't match expected range; signal dropouts or erratic readings at certain throttle angles.
Possible Causes
- TPS worn wiper track at specific position
- TPS connector intermittent
- Throttle body carbon buildup affecting movement
Troubleshooting Steps
- Step 1: Slowly sweep throttle and monitor TPS voltage
No dropouts in voltage - Step 2: Check TPS connector for loose terminals
Connector tight - Step 3: Inspect throttle body for carbon buildup
Throttle body clean - Step 4: Replace TPS if voltage dropout found
New TPS no dropouts - Step 5: Clear code and verify throttle response
Throttle response smooth
How to Reset
Clear with OBD-II scanner after repair.
Common Replacement Parts
- Throttle Position Sensor (OEM spec)
- Throttle Body Cleaner
Frequently Asked Questions
- Q: What causes TPS dead spots?
Wiper contact wear at commonly used throttle positions (usually idle and cruise). Creates dead spots where signal drops out.
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Source: SAE J2012 standard DTC list + OBD-II portal
Category: OBD-II
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