P1610 ECM Keep Alive Memory Fault
The P1610 code indicates a failure in the Keep Alive Memory (KAM) test within the Engine Control Module (ECM). This memory retains adaptive learning data and diagnostic trouble codes even when the vehicle is off. The ECM has detected an inconsistency or error in reading/writing this memory, often due to a loss of constant power or an internal module failure. In many cases, this code is linked to the Nissan Anti-Theft System (NATS) or a problem in the ECM's backup power circuit.
01. Most Common Causes
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine may not start or may stall
- Loss of adaptive memory (e.g., idle or fuel trims reset)
- Possible anti-theft system activation
03. Step-by-Step Diagnosis
Check the Keep Alive memory fuse and replace if blown
Inspect the ECM power supply wiring for damage, shorts, or opens
Verify proper connection and terminal tension at the ECM connector
Test for constant battery voltage at the ECM Keep Alive power pin
If all else is normal, suspect internal ECM failure or NATS issue; perform ECM reprogramming or replacement if necessary
1. Frequently Asked Questions
Is it safe to drive?▼
No, it is not recommended to drive with this code as it may cause stalling or no-start conditions, and could leave you stranded.
How much does it cost to fix?▼
Repair costs vary widely: fuse replacement is under $20, wiring repairs $50-$200, ECM replacement $500-$1500, and NATS-related fixes $100-$400.