AutoCodes – Generic – C1527

C1527 Code - Gear R Switch Error

Quick Answer

If the wrong reverse gear signal has been set for a certain period of time, a failure is recognized. Common causes include Faulty Gear R Switch, Gear R Switch harness is open or shorted, Gear R Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
C1527 indicates Gear R Switch Error.
Common causes
Common causes include Faulty Gear R Switch, Gear R Switch harness is open or shorted, Gear R Switch circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code Popularity 1,627
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Oct 22, 2020
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Code C1527 Description

If the wrong reverse gear signal has been set for a certain period of time, a failure is recognized. [A/T] Hydraulic Electronic Control Unit (HECU) receives reverse gear switch signal from TCM via C-CAN. [M/T] Cluster receives back up lamp signal from IPS (Intelligent Power Switch System) via B-CAN and sends it to HECU via C-CAN. The HECU monitors the Gear R Switch (Transaxle Range Switch). The HECU sets the OBDII code when the Gear R Switch is not to factory specifications.
OBDII Code C1527 - Gear R Switch Error - AutoCodes.com
C1527 Code - Gear R Switch Error

What are the Possible Causes of the DTC C1527?

  • Faulty Gear R Switch
  • Gear R Switch harness is open or shorted
  • Gear R Switch circuit poor electrical connection
  • Faulty Back-up Lamp Switch

How to Fix the DTC C1527?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1527 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the C1527 code?

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Need Help with the Code?

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Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C1527 Code

1. What does the OBDII code C1527 mean?

C1527 indicates a "Gear R Switch Error," typically related to a malfunction in the reverse gear switch or its associated circuitry.

2. What are the common symptoms of a C1527 code?

Symptoms include the reverse lights not working, failure of the backup camera to activate, or difficulty engaging reverse gear.

3. What causes the C1527 Gear R Switch Error?

Common causes include a faulty reverse gear switch, damaged wiring or connectors, or an issue with the transmission control module (TCM).

4. How can I diagnose the C1527 code?

Inspect the reverse gear switch, check for damaged or corroded wiring, and use a multimeter to test the circuit continuity.

5. Can a faulty reverse light trigger the C1527 code?

Yes, if the reverse light circuit is shorted or open, it can indirectly cause the Gear R Switch Error.

6. Is it safe to drive with the C1527 code?

While it may not impact forward driving, it can affect reverse gear functions, making it unsafe in certain situations like parking or reversing.

7. How do I fix the C1527 Gear R Switch Error?

Repair or replace the reverse gear switch, fix damaged wiring, and clear the code using an OBDII scanner.

8. Does the C1527 code require professional repair?

If you're comfortable with basic electrical diagnostics, you can attempt repairs. Otherwise, consult a mechanic for accurate troubleshooting.

9. Will clearing the C1527 code fix the problem?

Clearing the code won't resolve the underlying issue; you need to address the cause first to prevent the code from returning.

10. Can a failing transmission cause the C1527 code?

In rare cases, internal transmission problems affecting reverse gear engagement might contribute to this error.

Discuss the causes and fixes for C1527 OBDII Code

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