AutoCodes – Cadillac – P1694 Cadillac

P1694 Cadillac Code - Tachometer Circuit High Voltage

Quick Answer

With the key on, the Powertrain Control Module (PCM) detects an open, short-to-ground or short-to-voltage condition in the Tachometer Circuit. Common causes include Faulty Tachometer, Tachometer harness is open or shorted, Tachometer 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: P1694 Cadillac indicates Tachometer Circuit High Voltage.
Common causes: Common causes include Faulty Tachometer, Tachometer harness is open or shorted, Tachometer 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 3,303

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 09, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1694 Cadillac Description

With the key on, the Powertrain Control Module (PCM) detects an open, short-to-ground or short-to-voltage condition in the Tachometer Circuit.

OBDII Code P1694 Cadillac - Tachometer Circuit High Voltage - AutoCodes.com — P1694 Cadillac Code - Tachometer Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1694 Cadillac?

Faulty Tachometer
Tachometer harness is open or shorted
Tachometer circuit poor electrical connection

How to Fix the DTC P1694 Cadillac?

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 P1694 Cadillac 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.

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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 P1694 Cadillac Code

1. What are the common symptoms of OBDII code P1694 Cadillac (Tachometer Circuit High Voltage)?

The common symptoms of code P1694 Cadillac include a non-functioning tachometer, erratic tachometer readings, and the Check Engine Light being illuminated.

2. What can cause OBDII code P1694 Cadillac to trigger?

The code P1694 Cadillac (Tachometer Circuit High Voltage) can be triggered by issues such as a faulty tachometer, a malfunctioning tachometer circuit, or a wiring problem in the tachometer system.

3. How can I diagnose the source of OBDII code P1694 Cadillac?

To diagnose the source of code P1694 Cadillac, you can start by checking the tachometer for proper operation, inspecting the tachometer wiring and connections, and using a diagnostic scanner to read the code and identify the specific issue.

4. What are some repair tips for addressing OBDII code P1694 Cadillac?

Repair tips for addressing code P1694 Cadillac include checking and repairing any damaged wiring, replacing a faulty tachometer, ensuring all connections are secure, and clearing the code with a diagnostic scanner after the repair.

5. Can I drive my Cadillac with OBDII code P1694 (Tachometer Circuit High Voltage)?

It is generally safe to drive your Cadillac with code P1694 as long as no other symptoms of engine trouble are present. However, it is recommended to address the issue promptly to prevent potential damage to the tachometer system.

6. How serious is OBDII code P1694 Cadillac (Tachometer Circuit High Voltage)?

Code P1694 Cadillac is not typically a serious issue that affects the drivability or safety of the vehicle. However, it is still important to address the problem to ensure the proper functioning of the tachometer and prevent potential electrical issues.

7. Can I reset OBDII code P1694 Cadillac without fixing the underlying issue?

While you can reset the code temporarily, it will likely reappear if the underlying issue causing code P1694 is not addressed. It is recommended to fix the problem to prevent further issues.

8. How much does it cost to repair OBDII code P1694 Cadillac?

The cost to repair code P1694 Cadillac can vary depending on the specific cause of the issue. Repair costs may include replacing a faulty tachometer, repairing wiring, or addressing other related issues. It is advisable to consult a professional mechanic for a more accurate estimate.

9. Will OBDII code P1694 Cadillac cause any damage if left untreated?

Leaving code P1694 Cadillac untreated may not cause immediate damage to the vehicle, but it can lead to inaccurate tachometer readings and potential electrical system issues over time. It is best to address the problem to maintain the proper functioning of the tachometer system.

10. How long does it take to repair OBDII code P1694 Cadillac?

The time it takes to repair code P1694 Cadillac can vary depending on the complexity of the issue and the availability of parts. Some repairs may be completed quickly, while others may require more time for diagnostics and troubleshooting.