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AutoCodes - GMC - P1402 GMC

P1402 GMC Code - Exhaust Gas Recirculation Supply Circuit

- Code Popularity: 194 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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Code P1402 GMC Possible Causes

  • Faulty Exhaust Gas Recirculation (EGR) Valve
  • Exhaust Gas Recirculation Valve harness is open or shorted
  • Exhaust Gas Recirculation Valve circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How do I Fix the Code P1402 GMC?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Does your GMC have Safety Recalls? → Check here

What is the Cost to Diagnose the Code P1402 GMC?

Labor: 1.0

The cost of diagnosing the P1402 GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

What are Code P1402 GMC Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P1402 GMC Description

The Engine Control Module (ECM) supplies the Exhaust Gas Recirculation (EGR) valve with a 5 V reference circuit, a low reference circuit, an H-bridge motor directional control circuit, and a signal circuit. The EGR position sensor provides a signal voltage that changes relative to the EGR position. The EGR position sensor information is transmitted between the EGR valve and the ECM on the signal circuit. The Mass Air Flow (MAF) sensor signal is used by the ECM to detect the proper amount of EGR flow. The ECM will close the EGR valve, then open the EGR valve to 100%. The ECM will then calculate the MAF difference and determine if the proper EGR flow has been detected. The Diagnostic Trouble Code (DTC) will be set when the ECM detects a low voltage on the EGR motor supply for greater than 2.5 s.
OBDII Code P1402 GMC - Exhaust Gas Recirculation Supply Circuit -
P1402 GMC Code - Exhaust Gas Recirculation Supply Circuit

Need More Information on the P1402 GMC Code?

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