Error code
OBD2 P2521
OBD2P2521
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
A/C Request 'A' Circuit High.
Severity
moderateCan drive but may experience A/C issues.
Summary
P2521 indicates that there is an issue with the A/C Request 'A' circuit being too high, likely due to wiring problems near the AJC control module.
Common Causes
- Wiring short to positive
- AJC control module failure
Fixes
FAQ
What does P2521 mean?
P2521 means there is a problem with the A/C Request 'A' circuit, possibly due to wiring issues or AJC control module failure.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P2500Generator Lamp/L-Terminal Circuit Low
- P2501Generator Lamp/L-Terminal Circuit High
- P2502Charging System Voltage
- P2503Charging System Voltage Low
- P2504Charging System Voltage High
- P2505ECM/PCM Power Input Signal
- P2506ECM/PCM Power Input Signal Range/Performance
- P2507ECM/PCM Power Input Signal Low
- P2508ECM/PCM Power Input Signal High
- P2509ECM/PCM Power Input Signal Intermittent
- P2510ECM/PCM Power Relay Sense Circuit Range/Performance
- P2511ECM/PCM Power Relay Sense Circuit Intermittent