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Code Alarm CA6151

Security system with remote start

6 Reviews

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Item # 220CA6151

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Our take on the Code Alarm CA6151

Your new car may have a keyless entry remote, but does that mean you've got a security system built in as well? Odds are you don't. And even if you have a factory-installed security system, very few of them include an impact sensor — an essential feature if you want to stop a thief from smashing a window and taking what they want.

We offer vehicle-specific interfaces that you'll need to complete your remote start/car security installation. Please identify your vehicle as we review every order to make sure you've got everything you need.

Your new car may have a keyless entry remote, but does that mean you've got a security system built in as well? Odds are you don't. And even if you have a factory-installed security system, very few of them include an impact sensor — an essential feature if you want to stop a thief from smashing a window and taking what they want.

Code Alarm's CA6151 keyless entry and security system protects your car and its contents with an impact sensor and more, so unwanted intrusions won't be a worry anymore. Plus, it adds the convenience of remote start — you can start your car before you leave the house or your office to avoid the worst of winter's bite and summer's sweltering heat. The remote start system works with diesel and hybrid vehicles too. The system includes:

  • a dual-stage magnetic shock sensor that detects unauthorized tampering;
  • a powerful 125 dB weatherproof siren;
  • two metal-clad remote controls;
  • remote door lock and unlock;
  • a starter interrupt feature which shuts down ignition during unauthorized use.

Ignition-activated doorlocks, carjacking protection, and automatic/last-door rearming provide additional reassurance. The CA6151 also features an override switch for valet parking, while the "silent choice" feature allows you to arm and disarm your car alarm without disturbing your neighbors. You can expand your protection even more by adding an optional sensor to the auxiliary input.

And here's another great feature. Everyone knows how hard it can be to find your vehicle in a crowded parking lot. The car-finding feature will sound your alarm at low volume so you can find your car more quickly.

Important Note:
We offer an interface that can save you lots of time when you install a Code Alarm system in most vehicles. For a limited time, you can save $60 on the interface if purchased with this Code Alarm system. Chat or call us at 1-888-955-6000 to see if the interface will work with your vehicle.

Product Highlights:

  • automotive keyless entry and security system with remote start
  • Remote Start function is for fuel injected, diesel, and hybrid vehicles only
  • two 4-button extended range metal-clad transmitters
  • dual-stage impact sensor — chirps when the vehicle's bumped and sets off the alarm with further violations
  • 125 dB weatherproof siren
  • starter interrupt
  • one auxiliary channel

Great alarm and Crutchfield is #1 for car audio and alarms

John L, Pittsburgh Pa.

What's in the Box:

  • CA-6151 control module
  • 2 CATX-MT 4-button 1-way remote transmitters (each with CR2016 battery installed)
  • Key ring
  • 125dB Weatherproof siren with 17" power/ground wires
  • Glass-mount antenna (with dual-sided adhesive pad)
  • Dual-stage shock sensor (with 4-wire harness)
  • 4-Pin Main Harness (Length: 3')
  • 6-Pin Starter Harness (Length: 2')
  • 6-Pin Output harness (Length: 3')
  • 8-Pin Input Harness (Length: 3')
  • 4-Pin Alternate Output Harness (Length: 3')
  • 3-Pin Lock Output Harness (Length: 3')
  • SPDT Relay (for starter interrupt) with attached 18" 4-wire harness
  • 5-Pin Antenna Ribbon Cable (Length: 8')
  • Spring-loaded pin switch (with three hex nuts and an external-tooth lock washer)
  • Owner's Guide
  • Installation Guide
  • Limited Warranty/Consumer Registration Card
  • On-line registration card
  • Maximum Insurance Discount Authorization card
  • Warning sticker
  • Code-Alarm window decal

Code Alarm CA6151 Reviews

Average Customer Review(s):

(6 Reviews)

Code Alarm CA6151

Anonymous from Dearborn Heights, MI on 3/18/2012

Crutchfield Customer Review (What's this?)

Install instructions were clear and easy to read. Installed it on my 2004 Silverado with the Flash Logic Module which made things very simple with the factory Anti theft and remote keyless entry. System works flawlessly and was easy to setup and program. Highly recommend this system especially at this price point.

Pros: Great value, straight forward installation, Reliable.


Great Alarm/Remote start

Mike from NC on 1/28/2012

Installed this on my 87 K5. Install was fairly easy, just time consuming. Crutchfield tech support was great, as usual, with the couple of questions I had. I would recommend changing all the fuse to Bussman circuit breaker fuses ( Range is great, remote start has been a nice convenience in the mornings. Wish this model of alarm had a zone sensor.

Pros: Great Range, Great Crutchfield tech support. Good for the price.

Cons: Cheap in-line fuses. Requires some mechanical/electrical knowledge of your vehicle.

Great alarm

John L from Pittsburgh Pa. on 1/28/2012

Crutchfield Customer Review (What's this?)

Great alarm and Crutchfield is #1 for car audio and alarms



Great product, love the features

Patrick B from Central Point, Or on 1/20/2012

Crutchfield Customer Review (What's this?)

Great Product, Easy install, Love the remote start, door locks and auto set features of this alarm system. It's a comfort to know your protected with this.

Pros: Price, install and set-up

Cons: None yet.


Ryan from Cape May, NJ on 1/15/2012

Crutchfield Customer Review (What's this?)

The alarm is great. Only thing that was bothersome is i had to call code alarms tech support so they could send me the starter kill relay diagram, which they told me got left out of the instruction manual. Also you need to visit their website for vehicle specific wiring. That includes extra relays you might need, and other small things you might need including resistors or diodes. Their tech support was really helpful on getting me all the info i needed. It does take a while to get everything connected, butit is a great alarm system.

Pros: Comes with 2 quality transmitters, they aren't cheap plastic. Comes with all the wire harnesses needed.

Cons: Failed to indicate the extra requirements for the install, which is understandable for a universal installation kit. Also i would recommend buying a roll of 22 gauge wire for running wires to the siren and hood pin if you need to install that, which is included in the kit.

Great product, long install

ChrisS from Oceanport, NJ on 2/13/2011

Crutchfield Customer Review (What's this?)

Great product, system works well and does everything stated, installation is very tricky and took some time, would get professional installation if i was to do it again. The range on the remotes are amazing!




Hands-on research

Product Research

Alarm Features
Remote Start Features

Alarm Features

Overview: The Code-Alarm CA6151, a part of the Professional Series line, has a remote start for cooling down or warming up your vehicle before you drive, a keyless entry system to remotely lock or unlock your doors, and a security system to protect your vehicle and its contents. It comes with two remotes.

Note: The remote start function is for fuel injected, diesel, and hybrid vehicles only.

Remotes: The CA6151 comes with two 1-way, 4-button remote transmitters (CATX-MT). The remotes have sturdy metal bezels, and operate at 433 MHz to give you excellent range. The 1-way remotes contain four buttons for lock, unlock, vehicle locator/panic mode, and remote start. Requires one CR2016 battery (installed). Additional remotes (up to a total of 4) can be programmed to operate the alarm/remote start.

Glass-Mount Antenna: The included glass-mount antenna includes two LEDs and the valet switch built in. Typically, the antenna is mounted high on your windshield near the rear-view mirror, using the provided dual-sided adhesive pad. This location gives you optimal range for the remotes, high visibility for the status LEDs, and a convenient location for the valet switch/programming button.

Data Bus Interface (DBI) Port: The alarm's control module has a 4-pin Data Bus Interface (DBI) port, which allows you to plug in an optional FlashLogic Transponder/Door Lock/Remote Start Interface (item # 220FLCAN) directly into the system. These modules, compatible with many late model vehicles, can save considerable installation time by eliminating the need to find and splice various wires within the vehicle. Typical connections that are made with the interfaces include tachometer, brake, door locks, and ignition/starter.

Note: Even with the interface, there will be some required splicing into your vehicle's factory wiring.

125dB Siren: The CA6151 includes a siren which emits a single tone pattern at 125dB, which is equal to the threshold of pain in humans. Its compact size (2-3/4" footprint diameter, 3-3/8" horn diameter) gives you additional mounting flexibility. The weatherproof design keeps the siren operating flawlessly in the harsh, under hood environment.

Silent Choice: The Silent Choice feature allows you to control the arm/disarm chirps from the remote control. The system default is with Silent Choice enabled, which requires a second press of the "lock" button to activate an audible arming response from the vehicle.

Active/Passive Operation: The system can be programmed for passive or active arming and door locking. Active arming/locking requires the use of the remote to arm the system or to lock the doors. When programmed for passive operation, the doors lock and the system is armed automatically 1 minute after the last door is closed.

Delayed Arming: For vehicles with a delayed dome light, the system can be programmed to delay arming up to 60 seconds after the lock button is pressed. Once programmed, the system will learn the timing of the dome light delay and add 2 seconds before arming.

Door Locks/Trunk Release: The alarm can lock and unlock the vehicle's doors using the remotes. The alarm can be wired to work with positive or negative switching locks, reverse polarity, and positive or negative multiplexed door locks. Additional relays may be required for installation. In addition to unlocking and locking the doors, the system can also open the vehicle's trunk or hatch.

Note: When interfacing with any other type of factory door lock system besides negative switching locks, or when using aftermarket door lock actuators, two SPDT relays (such as 120E5000) will be needed. If your vehicle requires the use of a Data Integration module that controls your factory door locks, no extra parts besides the Data Integration module will be required.

Two-stage Door Unlock: The alarm's door lock function can be set to operate in two stages. The driver's door only is unlocked with one press of the unlock button. A second press of the button within 3 seconds will unlock the remaining doors.

Shock Sensor: The included dual-stage magnetic shock sensor will respond with a warning chirp when there is a light impact to the vehicle. Harder impacts will fully trigger the alarm. You can bypass the shock sensor for one arm cycle, and will default back to normal operation the next time the system is armed. The shock sensor's sensitivity can be adjusted if needed.

Starter Interrupt Output: When the alarm is triggered, the system will disable the vehicle by interrupting the circuit to the starter via a relay. As long as the system is in alarm mode, the vehicle's engine cannot be started, preventing a possible theft. The relay needed to install this feature is included with the alarm.

Personal Protection Alarm Mode: The alarm's Personal Protection or Panic Mode will activate an alert when you press and hold the panic button continually for three seconds. The transmitter's normal functions are suspended during panic mode, except to allow you to lock or unlock the doors. You can manually shut off the alarm with the transmitter, or the system will automatically stop after 30 seconds.

Real Panic Sound (RPS): During panic and alarm trigger modes, the horn and/or siren will sound in a randomized pattern. This draws more attention to the vehicle that alarms without this feature.

Progressive Car Find: To assist you in locating your vehicle in a crowded parking lot, the Progressive Car Find feature will sound the alarm and/or honk the horn five times at low volume. If you have not located the vehicle, the system will repeat the action at increasingly higher volumes (low, medium, high) with each press of the button.

Carjack Mode: The CA6151 features a Carjack mode, which must be turned on in system programming. The Carjack mode provides a delayed and progressive alarm response, starting with siren chirping, to full alarm with flashing parking lights, to starter kill activation, rendering the vehicle disabled.

Auxiliary Output: The alarm features an auxiliary output to operate optional accessories such as power windows or sunroof, or a powered sliding door. This 500mA output is capable of driving relays, and can be programmed to operate in various timing configurations (i.e. push and hold, latched, latched until ignition on, etc.).

Remote Start Features

Operation: The Code-Alarm CA6151 can remotely start your vehicle using the remote transmitters. When activated, the system will sound, the parking lights will flash once, and the system will confirm that the vehicle is safe to start. If all safety parameters are correct, the vehicle will start within 5 seconds. Once started, the parking lights will turn on as a visual indication that the vehicle has started and is running. If the vehicle stalls or fails to start, the system will pause 5 seconds, then try two more times to start the vehicle. If the vehicle does not start after the third attempt, the starting process will be aborted. Before operating the vehicle, you will need to insert the key, turn to the On position, and depress the brake to disengage the starter procedure.

Single/Double Press: The system can be configured that the remote start is activated with either a single press of the transmitter button or with two presses of the button.

Special Vehicle Accommodations: The remote start can be configured to accommodate a variety of vehicle engine types. You can program the remote start for a gasoline engine, with no delay for the starter output wire, or program the unit for a diesel engine with a delay in the starter output wire of 10, 15, 20, or 40 seconds after the ignition has been powered up by the remote start. This delay is required in order for the diesel engine's glow plugs to become ready to start the engine. The system also features a special compatibility for a hybrid vehicle.

Quick Stop: This feature allows you to keep the engine running and the vehicle secure while you make a short stop, taking the keys with you.

Interval Starting: The CA6151 has the ability to start the vehicle every 2 or 3 hours over a 48-hour period. This is an especially useful feature in cold climates. You can select a two- or three-hour interval, as well as the run times in the programming setup. During this period, you can shut off the engine at any time using the remote transmitter.

Daily Start Timer: The system has the ability to start your vehicle based on a 24-hour countdown timer. Once you have finished operating the vehicle for the day, a quick procedure must be followed to complete the timer process.

Extended Run Time: The system allows you to extend the time the vehicle will be running when under remote start. For example, if you have your vehicle set to run for 20 minutes and the time remaining in the current run cycle is 5 minutes, you can reset it to run another full 20 minutes.

Turbo Timer: If your vehicle has a turbo, the Turbo Timer option will keep the engine running for a period of time (1, 3, or 5 minutes) after you turn off the ignition key. This allows the vehicle's turbo to properly cool before the engine is shut off.

Tach Mode: The system can be programmed to determine how it will monitor the engine running during remote start. It can be set to one of the following options:

  • Tach: hard wired directly to the tach wire of the vehicle to monitor AC voltage.
  • Tachless (Crank Average / Voltage): determines crank time by averaging the last 8 times the vehicle was started with the key, then monitors the change in voltage after remote start.
  • Hybrid (Crank Average / No Voltage): determines crank time by averaging the last 8 times the vehicle was started with the key.
  • DBI Port: monitors the vehicle's tach rate through an interface module connected to the DBI port.

Smart Tachless Mode: This mode is only available if a tach signal has never been learned to the system, and when activated, will automatically change the Tach Mode feature in option programming to Tachless without the need to enter the feature programming mode.

Safety Features: For safety and security reasons, the system will shut down or prevent the remote starter from activating if any of the following occur:

  • The vehicle hood is open.
  • The brake pedal is pressed prior to turning the ignition key to the On position.
  • The engine is over-revved (tach checking only).
  • The valet mode is active.


FlashLogic Interface Module: The optional FlashLogic Databus Interface Module (220FLCAN) communicates with your vehicle's Databus to provide plug-in capability for various functions of the Code-Alarm security system. Typical functions include tach input, door trigger, dome light supervision, factory alarm arm/disarm, trunk/hatch open, diesel glow plug input, remote start, and factory keyless entry controls. Compatibility and available functions vary depending upon year, make, and model of vehicle.

Note: Before installing, the FlashLogic module will need to configured for your specific vehicle via web-update. Some splicing into factory wiring will be required.

Dual-Zone Microwave Sensor: The optional Code-Alarm Dual-Zone Microwave Sensor (item # 220MV3) detects movement through a protected area, such as someone trying to reach inside your vehicle. It has two detection zones, exterior and interior. When the exterior field is penetrated, the alarm emits a series of warn-away tones. When the interior zone is penetrated, the alarm goes into full alert. The unit should be mounted in the interior of the vehicle, near the center.

Note: The MV-3 microwave sensor includes a Y-adapter harness, designed to connect both the MV-3 and the shock sensor included with the alarm to the single shock sensor port on the alarm. However, the Y-adapter will not fit the port on the included shock sensor, so that part of the adapter must be cut off and hardwired to the shock sensor's harness.

Universal Transponder Interface (UTI): The optional Universal Transponder Interface (UTI) works with vehicles that use an "immobilizer" key system, allowing you to operate the alarm system without interfering with the vehicle's anti-theft features. The UTI works with vehicles that have a transponder or RF-based immobilizer, including the GM Passkey systems.

Digital Tilt Sensor: The optional Code-Alarm DUB1 digital tilt sensor (220DUB1) can detect when the angle of your vehicle changes and trigger the alarm to protect you from tow trucks and tire or wheel thieves. After you have parked your vehicle, the DUB1 has a digital self-leveling feature to determine the angle of your parked vehicle. If that angle changes due to the vehicle being jacked up or towed, it will trigger a full alarm in the security system.

Door Lock Actuators: Power door locks can be added to a vehicle with manual door locks with a Door Lock Actuator, enabling you to lock/unlock your doors with the CA6151's keyless entry feature. A Standard 2-wire Door Lock Actuator (item # 220DA1) is available for normal manual door locks. For cable-driven door locking systems, a Motor Clutch-type Door Lock Actuator (item # 220DA2) and a Cable Kit (item # 220CLBK) will be needed. You will need an actuator for each door you want to control.

1-way Remote Transmitter: Up to 4 remote transmitters can be used with the CA6151 security system. Additional CATX-MT 1-way 4-button remotes (220CATXMT) can be purchased and programmed to operate your system.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.