AutoCodes – Buick – P1346 Buick

P1346 Buick Code - Intake Camshaft Position Sensor System Performance

Quick Answer

The Camshaft Position (CMP) sensor input is used to detect an engine misfire. Common causes include Faulty Intake Camshaft Position sensor, Faulty Camshaft Position Solenoid Valve, Engine mechanical condition. 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: P1346 Buick indicates Intake Camshaft Position Sensor System Performance.
Common causes: Common causes include Faulty Intake Camshaft Position sensor, Faulty Camshaft Position Solenoid Valve, Engine mechanical condition.
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 3,630

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1346 Buick Description

The Camshaft Position (CMP) sensor input is used to detect an engine misfire. The Powertrain Control Module (PCM) also uses the CMP sensor signal as an input for modifying the fuel injection timing and for modifying the ignition timing.
The PCM receives information on the engine status from various engine sensors and then selects the most appropriate ignition timing settings from within the PCM's programming. The following are the most important inputs for determining ignition timing requirements:
- The engine speed
- The throttle position (TP)
- The intake air volume
- The engine coolant temperature (ECT)
- The knock sensor (KS) input

OBDII Code P1346 Buick - Intake Camshaft Position Sensor System Performance - AutoCodes.com — P1346 Buick Code - Intake Camshaft Position Sensor System Performance

What does this mean?

What are the Possible Causes of the DTC P1346 Buick?

Faulty Intake Camshaft Position sensor
Faulty Camshaft Position Solenoid Valve
Engine mechanical condition
Valve timing off
Intake Camshaft Position sensor harness is open or shorted
Intake Camshaft Position sensor circuit poor electrical connection

How to Fix the DTC P1346 Buick?

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 P1346 Buick 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 P1346 Buick Code

1. What does the OBDII code P1346 mean on a Buick?

P1346 indicates a problem with the intake camshaft position sensor system, specifically related to its performance or timing.

2. What are the common symptoms of code P1346 on a Buick?

Common symptoms include rough idling, reduced engine performance, poor fuel efficiency, difficulty starting, and the Check Engine Light being illuminated.

3. What causes the P1346 code to appear on a Buick?

This code can be caused by a faulty intake camshaft position sensor, a malfunctioning variable valve timing (VVT) system, low or dirty engine oil, a timing chain issue, or damaged wiring.

4. Can I drive my Buick with the P1346 code active?

It’s not recommended to drive for an extended period with this code active, as it can lead to reduced performance, poor fuel economy, and potential engine damage.

5. How do I diagnose the P1346 code on my Buick?

Start by checking the intake camshaft position sensor and its wiring for damage. Inspect the VVT system, verify the engine oil level and condition, and ensure proper timing chain alignment.

6. What role does engine oil play in the P1346 code?

Low or dirty engine oil can disrupt the operation of the variable valve timing system, which can trigger the P1346 code. Regular oil changes are crucial.

7. How much does it cost to fix the P1346 code on a Buick?

Repair costs can vary. Replacing the camshaft position sensor typically costs $100-$300, while more complex issues like timing chain repairs can cost significantly more, depending on labor rates.

8. What tools are needed to fix the P1346 code on a Buick?

You’ll typically need an OBDII scanner, a multimeter, basic hand tools, and possibly specialized tools for timing chain alignment or sensor replacement.

9. What happens if I ignore the P1346 code on my Buick?

Ignoring this code can lead to worsening engine performance, increased fuel consumption, and potential long-term engine damage.

10. Can a P1346 code be caused by a software issue in a Buick?

While rare, a faulty ECM (engine control module) or outdated software can sometimes contribute to this code. A software update or ECM inspection may be necessary.