EGR Throttle Position Sensor (Bank 1) Circuit Low
The P2168 code means the vehicle's onboard diagnostic system has detected: EGR Throttle Position Sensor (Bank 1) Circuit Low. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $80 - $400 (parts and labor)
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Common Symptoms
- Check Engine Light on
- Rough idle
- Increased NOx emissions
- Failed emissions test
- Slight hesitation during acceleration
Probable Causes (Ranked by Likelihood)
- Short to ground in EGR TPS circuit Very High
- Failed EGR TPS with low output High
- Wiring shorted near engine Moderate
- ECM input shorted Low
Frequently Asked Questions
What does P2168 mean?
P2168 indicates: EGR Throttle Position Sensor (Bank 1) Circuit Low. The ECM detected an abnormal condition in this sensor circuit.
Is P2168 serious?
Moderate. The vehicle may enter limp mode. Repair promptly.
What should I check first?
Start with a visual inspection of the sensor wiring and connector. Use a scan tool to read sensor data and compare to expected values. Check reference voltage (typically 5V) at the sensor connector.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Read EGR position sensor data on scan tool
-
Inspect EGR valve and sensor for carbon buildup
-
Measure EGR TPS reference voltage and signal
-
Clean EGR valve and retest sensor operation
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Commonly Affected Vehicles
- 2010-2020 Toyota Camry 2.5L
- 2008-2018 Honda Accord 2.4L
- 2008-2018 Ford F-150 5.0L
- 2010-2019 Chevrolet Silverado 5.3L
Related Codes
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