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DTC codes / GM codes / P1696

P1696 · GMRemote Keyless Entry Voltage High

P1696 on a GM vehicle means the body control module (BCM) has detected a voltage on the remote keyless entry (RKE) circuit that is higher than the expected operating range. The BCM monitors the RKE receiver signal and sets this code when the voltage exceeds its calibrated threshold, typically due to a short to voltage or a faulty receiver.

SystemPowertrain
Code typeGM specific
SeverityLow
Fix difficultyIntermediate
AreaComputer and output circuits

Symptoms you may notice

  • The keyless entry remote may stop working or work intermittently
  • The security light or service vehicle soon light may illuminate
  • The vehicle may fail to recognize the key fob when starting
  • Other RKE functions such as trunk release or panic alarm may be inoperative
  • Often no symptoms besides the warning light, especially if the fault is intermittent

Common causes, most likely first

  1. Faulty RKE receiver module internally shorted to voltage
  2. Chafed or shorted wiring in the RKE circuit contacting a power wire
  3. Water intrusion into the RKE receiver connector causing corrosion and voltage bleed
  4. BCM internal fault incorrectly reading the RKE voltage
  5. Aftermarket alarm or remote start installation tapping into the RKE circuit
  6. Loose or damaged ground connection for the RKE receiver causing reference voltage shift

How to diagnose and fix it

  1. Scan all modules for related codes and record freeze-frame data to confirm the fault conditions
  2. Inspect the RKE receiver connector and wiring for corrosion, chafing, or signs of water intrusion
  3. Measure voltage on the RKE signal circuit at the receiver with the key off and key on to compare against specifications
  4. Disconnect the RKE receiver and check if the high voltage remains on the BCM side, isolating whether the fault is in the receiver or wiring
  5. Check for aftermarket accessories spliced into the RKE circuit and remove or repair any poor connections
  6. If voltage is present on the signal wire with the receiver disconnected, trace the harness for a short to voltage and repair as needed
  7. Replace the RKE receiver or BCM only after confirming the fault is internal to the component

Before you replace the RKE receiver

  • A common oversight is assuming the RKE receiver is bad when the real problem is a shorted wire behind the dash or in the door boot, so always perform voltage checks with the receiver disconnected.
  • Aftermarket remote starters and alarm systems frequently backfeed voltage into the RKE circuit, setting P1696 even though the factory components are healthy.
  • The BCM may set P1696 intermittently due to a poor ground at the receiver, which raises the reference voltage and mimics a short to voltage.
  • This code does not always mean the receiver has failed; a weak or incorrect battery in the key fob can cause erratic signal voltage that the BCM interprets as high.
  • On some GM models, a faulty ignition switch or body control module ground can cause shared reference voltage issues that trigger P1696 along with other communication codes.

Can I keep driving with P1696?

The vehicle remains safe to drive because P1696 affects only the keyless entry convenience system and does not impair engine, transmission, or braking operation. Avoid relying on the remote until repaired, and use the key manually to lock or unlock the doors.

Tools that help

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Guidance is general and written for GM vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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