AutoCodes – Generic – P1496

P1496 Code - 5 Volt Supply Voltage Low Condition

Quick Answer

With the key on or engine running, the Powertrain Control Module (PCM) detects that the 5-volt supply to the sensors was under 3.5v for 5 seconds. Common causes include Shorted sensor, Sensor harness is open or shorted, Sensor 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: P1496 indicates 5 Volt Supply Voltage Low Condition.
Common causes: Common causes include Shorted sensor, Sensor harness is open or shorted, Sensor 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 23,579

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 Aug 25, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1496 Description

With the key on or engine running, the Powertrain Control Module (PCM) detects that the 5-volt supply to the sensors was under 3.5v for 5 seconds. Possible causes include a shorted 5-volt power supply, a shorted sensor, or its related feed circuit.

OBDII Code P1496 - 5 Volt Supply Voltage Low Condition - AutoCodes.com — P1496 Code - 5 Volt Supply Voltage Low Condition

What does this mean?

What are the Possible Causes of the DTC P1496?

Shorted sensor
Sensor harness is open or shorted
Sensor circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1496?

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 P1496 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 P1496 code?

Need more information on how to fix the P1496 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1496 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1496 Chrysler — 5 Volt Supply Voltage Low Condition
P1496 Dodge — 5 Volt Supply Voltage Low Condition
P1496 Jeep — 5 Volt Supply Voltage Low Condition
P1496 KIA — EGR Stepper Motor Malfunction
P1496 Mazda — EGR Valve Motor Coil 1 Open Or Short
P1496 Mitsubishi — 5 Volt Supply Output Too Low
P1496 Subaru — EGR Signal Line 2 Circuit Low

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 P1496 Code

1. What does the OBDII code P1496 mean?

P1496 indicates a "5 Volt Supply Voltage Low Condition," meaning the vehicle's Powertrain Control Module (PCM) has detected an issue with the 5-volt reference circuit.

2. What are the common symptoms of code P1496?

Symptoms may include difficulty starting the engine, poor engine performance, erratic idle, reduced fuel efficiency, or the check engine light being illuminated.

3. What causes the P1496 code to appear?

Common causes include a short to ground in the 5-volt reference circuit, a faulty PCM, a damaged wiring harness, or a failed sensor that relies on the 5-volt supply.

4. Can a bad sensor trigger the P1496 code?

Yes, a faulty sensor drawing excessive current or shorted internally can cause the 5-volt supply to drop, triggering the P1496 code.

5. How do I diagnose the P1496 code?

Start by inspecting the wiring and connectors for damage or corrosion, then use a multimeter to check the 5-volt supply at affected sensors. If all circuits are fine, test or replace the PCM.

6. Can a blown fuse cause the P1496 code?

In some cases, a blown fuse related to the 5-volt circuit may cause the P1496 code, so checking the fuses is a good step in the diagnostic process.

7. Is it safe to drive with the P1496 code?

Driving with the P1496 code is not recommended, as it can lead to poor performance, stalling, or further damage to the vehicle's electrical system.

8. What sensors typically rely on the 5-volt reference circuit?

Sensors like the throttle position sensor (TPS), manifold absolute pressure sensor (MAP), and crankshaft position sensor (CKP) often rely on the 5-volt reference circuit.

9. How much does it cost to fix the P1496 code?

Repair costs vary depending on the cause, ranging from $50 for minor wiring repairs to several hundred dollars if the PCM needs replacement.

10. Can a failing PCM cause the P1496 code?

Yes, a failing PCM that cannot maintain the 5-volt reference supply can trigger the P1496 code, though this is less common than wiring or sensor issues.