AutoCodes – Jeep – P1488 Jeep

P1488 Jeep Code - 5 Volt Supply Voltage Low Condition

Quick Answer

The Diagnostic Trouble Code (DTC) will be set when the Engine Control Module (ECM) detected the 5-volt reference voltage at the input sensors was low during the constant monitor test. Common causes include Faulty Manifold Absolute Pressure (MAP) Sensor, Faulty Camshaft Position Sensor, Sensor harness is open or shorted. 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: P1488 Jeep indicates 5 Volt Supply Voltage Low Condition.
Common causes: Common causes include Faulty Manifold Absolute Pressure (MAP) Sensor, Faulty Camshaft Position Sensor, Sensor harness is open or shorted.
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 3,753

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 30, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
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Code P1488 Jeep Description

The Diagnostic Trouble Code (DTC) will be set when the Engine Control Module (ECM) detected the 5-volt reference voltage at the input sensors was low during the constant monitor test.

OBDII Code P1488 Jeep - 5 Volt Supply Voltage Low Condition - AutoCodes.com — P1488 Jeep Code - 5 Volt Supply Voltage Low Condition

What does this mean?

What are the Possible Causes of the DTC P1488 Jeep?

Faulty Manifold Absolute Pressure (MAP) Sensor
Faulty Camshaft Position Sensor
Sensor harness is open or shorted
Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1488 Jeep?

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 P1488 Jeep 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.