P0605 on Jeep
Internal Control Module Read Only Memory (ROM) Error
P0605 on Jeep vehicles indicates internal control module read only memory (rom) error. Au7o has documented this code across 1 Jeep model — most commonly on Grand Cherokee. The module's internal Read Only Memory (ROM), which holds the operating program/calibration, failed its self-test. The stored program is corrupt or unreadable, an internal module hardware fault. Typical repair costs on Jeep range from $300 to $1,000, depending on the specific model and root cause.
Common Causes of P0605
- •Corrupted internal ROM/program memory
- •Failed or interrupted reprogramming
- •Low/unstable voltage during operation
- •Internal electronic component failure
- •Defective control module
P0605 on Jeep by Model
Jeep Grand Cherokee(1 issue)
- Powertrain Control Module (PCM) Failure Causing Intermittent Warm-Weather Stalling and No-Start1999-2004
The WJ PCM (engine computer) can develop internal faults — often heat/temperature-related micro-cracks or solder failures — that cause intermittent stalling, hard-to-diagnose no-starts and driveability problems that come and go with ambient temperature. A well-known WJ case: a 2000 4.7L stalled only when outside air exceeded ~60F; a rebuilt/replaced PCM cured it after many other parts were replaced in vain.
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View P0605 across all makes →Frequently Asked Questions
What does P0605 mean on Jeep?▼
P0605 stands for "Internal Control Module Read Only Memory (ROM) Error." The module's internal Read Only Memory (ROM), which holds the operating program/calibration, failed its self-test. The stored program is corrupt or unreadable, an internal module hardware fault. On Jeep specifically, this code is documented across 1 model.
What causes P0605 on Jeep vehicles?▼
Common causes on Jeep: Corrupted internal ROM/program memory, Failed or interrupted reprogramming, Low/unstable voltage during operation, Internal electronic component failure, Defective control module. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0605 on a Jeep?▼
Repair costs on Jeep range from $300 to $1,000, depending on the specific model and root cause.
Which Jeep models have P0605 documented?▼
Au7o has documented P0605 on 1 Jeep model: Grand Cherokee.