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Jeep PCM, ECM, ECU, Engine & Car Computer Replacement
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9 Jeep Models and 210 Modules: Wrangler Through Gladiator
Car Computer Exchange stocks 210 remanufactured Jeep PCM, ECM, and ECU modules across 9 model families, covering 1996 through 2020. Whether your Jeep's powertrain control module is called a PCM, ECM, ECU, engine control module, or car computer, every unit ships VIN-programmed and ready to install.
- Wrangler: 31 modules (TJ, JK, JL generations, 2.5L I4 through 3.6L Pentastar V6)
- Grand Cherokee: 67 modules (WJ, WK, WK2, 4.0L I6 through 6.4L HEMI V8)
- Cherokee: 30 modules (XJ 4.0L I6, KL 2.4L Tigershark and 3.2L Pentastar V6)
- Compass: 21 modules
- Patriot: 19 modules
- Commander: 12 modules (3.7L V6, 4.7L V8, 5.7L HEMI V8)
- Liberty: 11 modules (KJ and KK, 2.4L I4 through 3.7L V6)
- Renegade: 11 modules (1.4L Turbo I4, 2.4L Tigershark I4)
- Gladiator: 1 module
The 3.6L Pentastar V6 and 5.7L HEMI V8 are the most common engine platforms in the Jeep catalog. Both share PCM calibration families across the Stellantis lineup, with VIN programming identifying the exact vehicle.
Jeep PCM Failure Codes: P0600 Through P0700
A failing Jeep PCM triggers diagnostic trouble codes that flag internal memory, processor, or communication faults. If your scan tool returns "no communication with PCM" or multiple unrelated codes fire simultaneously, the module itself is the most likely source.
Common Jeep PCM and engine computer diagnostic codes include P0600 (serial communication link fault), P0601 (internal control module memory checksum error), P0606 (PCM processor fault), and P0700 (transmission control system malfunction, PCM-to-TCM communication).
On 2007-2011 Wrangler JK models with the 3.8L V6, the PCM can fail to send a charging signal to the alternator, draining the battery while driving. This is one of the most commonly reported Jeep-specific PCM failure patterns. Grand Cherokee WK2 models (2011-2013, 3.6L and 5.7L) can develop similar internal-circuit failures that trigger multiple codes at once.
If the same DTC returns after a scan tool clear and you have already replaced sensors and wiring, the engine control module is the next component to test.
SKIM to WIN: How Car Computer Exchange Programs Every Jeep Module
Every Jeep PCM, ECM, and engine control module from Car Computer Exchange ships pre-programmed to your VIN with your vehicle's anti-theft system pre-synced. No dealer visit. No separate programming fee.
Jeep anti-theft systems changed across three generations:
- SKIM (Sentry Key Immobilizer Module), 1998-2007: Locks out the engine if the PCM and transponder keys are not paired. Car Computer Exchange pre-syncs SKIM data during programming.
- SKREEM, mid-2000s forward: Replaced SKIM on later platforms with an updated authentication protocol.
- WIN (Wireless Ignition Node), 2008 and newer: The current anti-theft controller on modern Jeep models.
Car Computer Exchange runs every Jeep module through a 13-point quality check on a vehicle simulator before shipping, verifying sensor inputs, fuel maps, anti-theft pairing, CAN bus communication, and transmission logic under load. After installation, a key-on idle relearn (10 minutes, then drive cycle) completes the calibration.
Ship the old unit back in the prepaid box within 21 days and Car Computer Exchange activates a free lifetime warranty on the replacement. If the module does not resolve the issue, the 60-day Iron-Clad Guarantee covers a refund or exchange. Full warranty terms here. Dodge and Chrysler modules on the shared Stellantis platform follow the same programming and coverage.
TIPM or PCM? Diagnosing the Right Jeep Module
Jeep Wrangler, Grand Cherokee, Liberty, and Commander owners should check for TIPM (Totally Integrated Power Module) symptoms before replacing the PCM. Both modules cause overlapping electrical failures on the shared Stellantis platform.
If the fuel pump relay is the issue (engine cranks but won't start, fuel pump runs with key off), or wipers and headlights activate on their own, the TIPM is the more likely source. Jeep TIPM repair services from Car Computer Exchange rebuild the internal relay circuits and ship the module back programmed to your VIN.
If the codes point to internal processor or memory faults (P0601, P0606), the PCM is the problem. Chrysler and Dodge vehicles share the same TIPM-7 design, so the diagnostic logic applies across all Stellantis makes.
FAQs
What does the PCM do on a Jeep?
The PCM (powertrain control module) is your Jeep's central computer. It manages fuel injection, ignition timing, emissions, and automatic transmission shifting. When it fails, multiple systems go down at once, which is why a bad PCM often triggers several unrelated diagnostic codes simultaneously. ECM (engine control module) and ECU (electronic control unit) are older terms that describe the same module on modern Jeeps.
How do I know if my Jeep PCM is bad?
The strongest indicator is a scan tool showing "no communication with PCM." Other signs include a check engine light that won't clear after replacing sensors, erratic or harsh shifting, engine misfires, stalling, and poor fuel economy. If multiple unrelated codes fire at the same time, the PCM is the most likely source rather than individual components.
How much does a Jeep PCM replacement cost?
A dealer replacement typically runs $800 to $2,000 or more once you add parts, labor, and a separate programming fee. A remanufactured, VIN-programmed module from Car Computer Exchange costs less because programming is included and no dealer labor is required. Exact pricing depends on your Jeep's year, model, and engine size. Select your Jeep's year, model, and engine on the product page for current pricing.
Do I need to visit a dealer after installing a replacement Jeep PCM?
Not with a VIN-programmed module from Car Computer Exchange. Every Jeep PCM ships pre-programmed with your VIN, mileage, and latest factory software. The anti-theft system (SKIM, SKREEM, or WIN, depending on your model year) is pre-synced to your keys. Most buyers plug the module in and complete a short idle relearn. A dealer visit is only necessary if you purchase an unprogrammed module from another source.
What is the difference between a Jeep PCM, ECM, and ECU?
A PCM (powertrain control module) manages both engine and automatic transmission functions. An ECM (engine control module) handles the engine only. An ECU (electronic control unit) is a general term for any vehicle computer. Most Jeep models use a PCM because the engine and transmission share a single module. Car Computer Exchange lists Jeep modules under all three names so you find the right match regardless of which term your mechanic or parts catalog uses.
Does Car Computer Exchange carry modules for discontinued Jeep models?
Yes. Commander (2006-2010, 12 modules), Liberty (2002-2012, 11 modules), and Patriot (2007-2017, 19 modules) are all in the active catalog alongside current models like the Wrangler and Grand Cherokee. The full Jeep inventory covers 210 modules across 9 model families from 1996 through 2020.
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The most common questions related to exchanging your car computer for one that works.
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