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Code P1875

Quick reference

P1875 at a glance

Plain-language meaning
This code means that the car's computer has detected a problem with the electrical circuit that controls shifting between 6th and 5th gear. It's like a light switch that's stuck in the 'on' position when it should be 'off'.
Urgency
Moderate – It is advisable to address this issue soon to avoid potential transmission damage.
Difficulty
Moderate
System
Transmission Issue
Tools mentioned
OBD-II scanner, Multimeter, Wrench set

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means that the car's computer has detected a problem with the electrical circuit that controls shifting between 6th and 5th gear. It's like a light switch that's stuck in the 'on' position when it should be 'off'.

Explanation

The P1875 code indicates that there is an issue with the electrical circuit responsible for shifting the transmission from 6th to 5th gear, specifically that the voltage is higher than expected.

Technical description

The P1875 code is triggered when the transmission control module (TCM) detects a high voltage condition in the shift solenoid circuit responsible for the 6 to 5 gear shift. This could be due to a short circuit, a faulty solenoid, or a wiring issue.

Symptoms

• Transmission stuck in one gear

• Harsh or delayed shifting

• Check Engine Light illuminated

Common Causes

• Faulty shift solenoid

• Wiring issues such as short circuits

• Malfunctioning transmission control module (TCM)

Glossary

Shift Solenoid: An electromechanical device in the transmission that controls gear shifting.

Transmission Control Module (TCM): A computer that controls the transmission's functions.

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the wiring and connectors for damage or corrosion.

• Test the shift solenoid for proper operation.

Repair procedures

• Repair or replace damaged wiring or connectors.

• Replace the faulty shift solenoid.

• Reprogram or replace the transmission control module if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Wrench set

Estimated repair cost

$200 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Silverado

• GMC Sierra

• Cadillac Escalade

Preventive measures

• Regular transmission fluid checks and changes

• Routine inspection of wiring and connectors

• Avoid aggressive driving that can stress the transmission

Error code type

Transmission Issue

User experience recommendations

• Avoid driving at high speeds until the issue is resolved.

• Consult a professional mechanic for accurate diagnosis and repair.

Warranty information

Check with your vehicle manufacturer for warranty coverage on transmission components.

Historical data

The P1875 code has been associated with GM vehicles and is often related to wiring issues or solenoid failures.

Urgency level

Moderate – It is advisable to address this issue soon to avoid potential transmission damage.

Testing conditions

• Vehicle at operating temperature

• Transmission in drive mode

Component location

The shift solenoid is located inside the transmission, typically accessible by removing the transmission pan.

FAQs

Q: Can I drive with a P1875 code?
A: It's not recommended to drive with this code, as it can lead to further transmission damage.

Q: How do I reset the P1875 code?
A: After fixing the issue, you can reset the code with an OBD-II scanner.

Optional diagnostic gear

Tools that may help diagnose P1875

THINKCAR ThinkScan Bidirectional diagnostic tool illustration

High-End · Full-system diagnostics

THINKCAR ThinkScan Bidirectional

A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.

Network faults often require full-system access instead of a generic code reader alone.

View on Amazon
Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.

View on Amazon
WORKPRO Wiring Repair Kit diagnostic tool illustration

Universal · Wire connectors and repair kit

WORKPRO Wiring Repair Kit

Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.

Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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