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P1635 Chevrolet Code - 5-Volt Reference Circuit Low Conditions

- Code Popularity: 51,221 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1635 Chevrolet?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • A/C Pressure sensor harness is open or shorted
  • MAP sensor harness is open or shorted
  • EGR valve harness is open or shorted
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How to Fix the DTC P1635 Chevrolet?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1635 Chevrolet code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

The P1635 code is set when the reference voltage from the sensor is our of range.

What are Code Possible Symptoms?

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

Code P1635 Chevrolet Description

The Powertrain Control Module (PCM) uses a common 5.0 Volt Reference 1 circuit as a sensor feed. This circuit supplies 5 Volts to the following sensors: The Air Condition (A/C) Pressure sensor, the Manifold Absolute Pressure (MAP) sensor, and the Engine Gas Recirculation (EGR) valve. The PCM monitors the voltage on the 5.0 Volt Reference 1 circuit.

OBDII Code P1635 Chevrolet - 5-Volt Reference Circuit Low Conditions - AutoCodes.com
P1635 Chevrolet Code - 5-Volt Reference Circuit Low Conditions

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Code P1635 Chevrolet comments

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