P2170 moderate

EGR Throttle Position Sensor (Bank 1) Circuit Intermittent

The P2170 code means the vehicle's onboard diagnostic system has detected: EGR Throttle Position Sensor (Bank 1) Circuit Intermittent. This is a moderate severity code.

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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)

Intermittent EGR TPS connection Very High
Loose EGR TPS connector pins High
Cracked EGR TPS Moderate
Wiring chafing near EGR valve Low

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

Frequently Asked Questions

What does P2170 mean?

P2170 indicates: EGR Throttle Position Sensor (Bank 1) Circuit Intermittent. The ECM detected an abnormal condition in this sensor circuit.

Is P2170 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.