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Code P1696

Quick reference

P1696 at a glance

Plain-language meaning
This means there's a problem with the car's main relay, which is like a switch that helps turn on important parts of the car. It's not working right now.
Urgency
High – This issue can prevent the vehicle from starting or cause it to stall unexpectedly.
Difficulty
Moderate
System
Electrical Circuit Issue
Tools mentioned
Multimeter, OBD-II scanner, Relay tester

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

Laymans terms

This means there's a problem with the car's main relay, which is like a switch that helps turn on important parts of the car. It's not working right now.

Explanation

The P1696 code indicates that the main relay control circuit is experiencing a low voltage condition.

Technical description

The main relay is responsible for supplying power to critical components of the vehicle's engine management system. A low condition in the control circuit means that the relay is not receiving the necessary voltage to operate correctly, which can prevent the vehicle from starting or running properly.

Symptoms

• Engine will not start

• Intermittent stalling

• Check engine light is on

Common Causes

• Faulty main relay

• Wiring issues such as shorts or open circuits

• Failed engine control module (ECM)

Glossary

Relay: An electrical device that opens or closes a circuit under the control of another electrical circuit.

ECM: Engine Control Module, the computer that controls engine functions.

Diagnosis steps

• Check the main relay for proper operation.

• Inspect wiring and connectors for damage or corrosion.

• Test the ECM for faults.

Repair procedures

• Replace the faulty main relay.

• Repair or replace damaged wiring or connectors.

• Replace the ECM if necessary.

Tools required

• Multimeter

• OBD-II scanner

• Relay tester

Estimated repair cost

$100 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Chrysler PT Cruiser

• Jeep Grand Cherokee

• Dodge Neon

Preventive measures

• Regularly inspect and maintain electrical connections.

• Avoid exposure of electrical components to moisture.

• Perform regular vehicle diagnostics.

Error code type

Electrical Circuit Issue

User experience recommendations

• Do not ignore the check engine light.

• Get the vehicle diagnosed by a professional if unsure.

• Regular maintenance can prevent such issues.

Warranty information

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

Historical data

This code has been associated with electrical issues in certain Chrysler and Jeep models, often due to relay or wiring problems.

Urgency level

High – This issue can prevent the vehicle from starting or cause it to stall unexpectedly.

Testing conditions

• Vehicle in ignition on position

• Battery fully charged

Component location

The main relay is typically located in the engine compartment, often within the fuse box.

FAQs

Q: Can I drive my car with a P1696 code?
A: It's not recommended, as the vehicle may stall or fail to start.

Q: How can I reset the P1696 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, the code will return.

Optional diagnostic gear

Tools that may help diagnose P1696

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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