AutoCodes – Generic – P2628

P2628 Code - Oxygen Sensor Pumping Current Trim Circuit High Bank 1 Sensor 1

Quick Answer

A resistor is installed in the Universal Heated Oxygen Sensor (HO2S) connector for part to part variance. Common causes include Faulty Heated Oxygen Sensor (HO2S), Heated Oxygen Sensor (HO2S) harness is open or shorted, Heated Oxygen Sensor (HO2S) 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: P2628 indicates Oxygen Sensor Pumping Current Trim Circuit High Bank 1 Sensor 1.
Common causes: Common causes include Faulty Heated Oxygen Sensor (HO2S), Heated Oxygen Sensor (HO2S) harness is open or shorted, Heated Oxygen Sensor (HO2S) 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 14,449

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 Jan 22, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P2628 Description

A resistor is installed in the Universal Heated Oxygen Sensor (HO2S) connector for part to part variance. The Powertrain Control Module (PCM) determines the value of this resistor by taking multiple measurements of the resistor during each ignition ON event. The PCM uses this value in order to compensate for the variance in the pumping current signal. The test fails if the PCM determines the resistance value is too high.

OBDII Code P2628 - Oxygen Sensor Pumping Current Trim Circuit High Bank 1 Sensor 1 - AutoCodes.com — P2628 Code - Oxygen Sensor Pumping Current Trim Circuit High Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P2628?

Faulty Heated Oxygen Sensor (HO2S)
Heated Oxygen Sensor (HO2S) harness is open or shorted
Heated Oxygen Sensor (HO2S) circuit poor electrical connection

How to Fix the DTC P2628?

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 P2628 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 P2628 code?

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Information for Specific Makes

P2628 Acura — Air/Fuel Ratio Sensor Bank 1 Sensor 1 Circuit High Voltage
P2628 Buick — HO2S Pump Current Trim Circuit High Voltage Sensor 1
P2628 Cadillac — HO2S Pump Current Trim Circuit High Voltage Sensor 1
P2628 Chevrolet — HO2S Pump Current Trim Circuit High Voltage Sensor 1
P2628 Dodge — Oxygen Sensor Positive Current Trim Circuit High Bank 1 Sensor 1
P2628 Ford — Oxygen Sensor Positive Current Trim Circuit High Bank 1 Sensor 1
P2628 GMC — HO2S Pump Current Trim Circuit High Voltage Sensor 1
P2628 Honda — Air/Fuel Ratio Sensor Bank 1 Sensor 1 Circuit High Voltage
P2628 Lincoln — Oxygen Sensor Positive Current Trim Circuit High Bank 1 Sensor 1
P2628 Mercury — Oxygen Sensor Positive Current Trim Circuit High Bank 1 Sensor 1

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.