P0642 — Sensor Reference Voltage 'A' Circuit Low

Powertrain (engine/transmission)

Sensor Reference Voltage 'A' Circuit Low

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Can I drive with P0642?

You can usually drive home and book an inspection within a few days.

Frequently asked questions

What does fault code P0642 mean?

P0642 means Sensor Reference Voltage 'A' Circuit Low.

Can I keep driving with P0642?

You can usually drive home and book an inspection within a few days.

Related fault codes

• P0640 — Engine Intake Air Heater Control Circuit
• P0641 — Sensor Reference Voltage 'A' Circuit/Open
• P0643 — Sensor Reference Voltage 'A' Circuit High
• P0644 — Driver Display Serial Communication Circuit
• P0645 — A/C Clutch Relay Control Circuit /Open
• P0646 — A/C Clutch Relay Control Circuit Low
• P0647 — A/C Clutch Relay Control Circuit High
• P0648 — Immobilizer Lamp Control Circuit
• P0649 — Speed Control Lamp Control Circuit

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