P1600 on Honda
Loss of Keep Alive Memory (KAM) Power
P1600 on Honda vehicles indicates loss of keep alive memory (kam) power. Au7o has documented this code across 1 Honda model — most commonly on CR-Z. This manufacturer-specific code (common on Ford) means the engine computer lost its Keep Alive Memory (KAM) power, the constant battery feed that lets the PCM retain learned data such as fuel trims, idle, and transmission adaptive settings even when the key is off. An open circuit, weak battery, or recently disconnected battery can interrupt this feed and set the code. After it sets, the vehicle may idle or shift oddly until it relearns. It is usually a wiring, ground, or battery issue rather than a failed computer. Typical repair costs on Honda range from $1,000 to $3,000, depending on the specific model and root cause.
Common Causes of P1600
- •Weak, discharged, or recently disconnected battery
- •Open or broken KAM power circuit wiring
- •Corroded or loose battery terminals or ground
- •Blown fuse feeding KAM power
- •Poor PCM connector contact
- •Faulty PCM (less common)
P1600 on Honda by Model
Honda CR-Z(1 issue)
- IMA Hybrid Battery Pack Degradation and Recalibration Issues2011-2016
The CR-Z uses Honda Integrated Motor Assist (IMA) system with a nickel-metal hydride (NiMH) battery pack located behind the rear seats. The battery pack degrades over time, losing capacity and causing the IMA system to become less effective at assisting acceleration and regenerating energy. The battery management system can also lose its calibration, causing incorrect state-of-charge readings and frequent IMA warning lights. In severe degradation, the IMA system shuts down entirely, leaving the car running on the 1.5L engine alone.
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View P1600 across all makes →Frequently Asked Questions
What does P1600 mean on Honda?▼
P1600 stands for "Loss of Keep Alive Memory (KAM) Power." This manufacturer-specific code (common on Ford) means the engine computer lost its Keep Alive Memory (KAM) power, the constant battery feed that lets the PCM retain learned data such as fuel trims, idle, and transmission adaptive settings even when the key is off. An open circuit, weak battery, or recently disconnected battery can interrupt this feed and set the code. After it sets, the vehicle may idle or shift oddly until it relearns. It is usually a wiring, ground, or battery issue rather than a failed computer. On Honda specifically, this code is documented across 1 model.
What causes P1600 on Honda vehicles?▼
Common causes on Honda: Weak, discharged, or recently disconnected battery, Open or broken KAM power circuit wiring, Corroded or loose battery terminals or ground, Blown fuse feeding KAM power, Poor PCM connector contact. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1600 on a Honda?▼
Repair costs on Honda range from $1,000 to $3,000, depending on the specific model and root cause.
Which Honda models have P1600 documented?▼
Au7o has documented P1600 on 1 Honda model: CR-Z.