P1317 AICE Chip Circuit Failure
P1317 is a manufacturer-specific diagnostic trouble code indicating a failure in the AICE (Automotive Ignition Control Equipment) chip circuit within the powertrain control module (PCM). This chip processes crankshaft position sensor signals to detect misfires per cylinder. When this code sets, the PCM has detected an internal electronic fault in this monitoring circuit, which typically disables the OBD-II system's ability to log and report misfires.
01. Most Common Causes
- Internal electronic failure of the AICE chip inside the PCM
- PCM damaged by overvoltage or a previous short circuit in the ignition system
- Incorrect PCM software update or reprogramming
- Faulty voltage supply or ground to the PCM
- Severe electromagnetic interference in the crankshaft position sensor wiring
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Misfire detection disabled; misfires may go unnoticed
03. Step-by-Step Diagnosis
Scan for additional codes and freeze frame data
Inspect PCM power and ground circuits for voltage drops or corrosion
Check for any aftermarket modifications or recent PCM programming
Test crankshaft position sensor and its wiring for interference or damage
If all else fails, replace or reprogram the PCM
1. Frequently Asked Questions
Is it safe to drive?▼
Driving is not recommended because the misfire monitor is disabled, which can lead to undetected misfires causing catalytic converter damage or other engine issues.
How much does it cost to fix?▼
Repair costs typically range from $500 to $1,500, depending on whether the PCM can be reprogrammed or needs replacement.