P0622 on Jeep
Generator Field "F" Terminal Control Circuit
P0622 on Jeep vehicles indicates generator field "f" terminal control circuit. Au7o has documented this code across 1 Jeep model — most commonly on Grand Cherokee. A fault in the generator field 'F' terminal control circuit that the PCM uses to control alternator field excitation and regulate output. The circuit is open, shorted, or not responding as commanded.
Common Causes of P0622
- •Faulty alternator/voltage regulator
- •Open or short in the 'F' terminal circuit
- •Corroded/damaged wiring or connectors
- •Poor ground
- •Internal PCM driver fault
P0622 on Jeep by Model
Jeep Grand Cherokee(1 issue)
- Sudden Alternator Failure Causing Stall / Fire Risk (Recalls 14V-634, 17V-435)2011-2014
Grand Cherokees with electro-hydraulic power steering subject the alternator to cyclical electrical loads that cause thermal failure of the internal diodes. The alternator can fail suddenly, stalling the vehicle without warning and, in some cases, short-circuiting and causing an under-hood fire. Multiple NHTSA campaigns cover the 160/180/220-amp units.
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View P0622 across all makes →Frequently Asked Questions
What does P0622 mean on Jeep?▼
P0622 stands for "Generator Field "F" Terminal Control Circuit." A fault in the generator field 'F' terminal control circuit that the PCM uses to control alternator field excitation and regulate output. The circuit is open, shorted, or not responding as commanded. On Jeep specifically, this code is documented across 1 model.
What causes P0622 on Jeep vehicles?▼
Common causes on Jeep: Faulty alternator/voltage regulator, Open or short in the 'F' terminal circuit, Corroded/damaged wiring or connectors, Poor ground, Internal PCM driver fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0622 on a Jeep?▼
Repair costs vary widely depending on the root cause and specific Jeep model.
Which Jeep models have P0622 documented?▼
Au7o has documented P0622 on 1 Jeep model: Grand Cherokee.